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Stable Ultrashort Pulse Generation Using a Coiled and Tapered Few-Mode-Fiber Polarization Controller as a Saturable Absorber J. Russ. Laser Res. (IF 0.9) Pub Date : 2024-03-15 F. Y. Zhao, X. H. Hu, F. M. Zou, T. Zhang, Y. S. Wang, J. Q. Lan
We present a coiled and tapered graded-index few-mode-fiber (FMF) polarization controller (PC) as a saturable absorber (SA) in an all-fiber laser. We obtain the 845 fs ultrashort pulse with a signal-to-noise ratio (SNR) of 65 dB, using a tapered graded-index FMF of 40 cm in the cavity. The spectrum is centered at 1588.2 nm with a 3 dB spectral bandwidth of 4.04 nm. Furthermore, a Q-switched mode-locked
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Generation of Dual-Wavelength Optical Domain–Wall Dark–Bright Pulses by Composite Filtering Effects J. Russ. Laser Res. (IF 0.9) Pub Date : 2024-03-15
Abstract Optical domain–wall (DW) solitons have attracted considerable attention for their special applications in wavelength-division multiplexing and signal processing in optical communications. In this study, we construct a dispersion-managed fiber laser with a composite filtering effect composed of nonlinear polarization rotation (NPR) filtering and Lyot filtering for achieving dual-wavelength
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Corrosion Performance of Graphene-Strengthened CoCrFeNiMo0.2 High-Entropy Alloy in Simulated Acid Rain Prepared by Laser Cladding J. Russ. Laser Res. (IF 0.9) Pub Date : 2024-03-15 Xingwu Qiu
We study the graphene (Gr)-strengthened CoCrFeNiMo0.2 high-entropy alloys (HEAs) prepared by laser cladding. The corrosion properties of the alloys under simulated acid rain conditions are studied through rainfall experiments, electrochemical experiments, and immersion experiments. The experimental results show that the microstructure of the Gr-strengthened CoCrFeNiMo0.2 HEAs mainly including three
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Research on Ghost Imaging Method Based on Binocular Vision Matching Fusion J. Russ. Laser Res. (IF 0.9) Pub Date : 2024-03-15 Hualong Ye, Daidou Guo, Tongxu Xu
In order to meet the visual characteristics of human eyes, in this paper, we propose a ghost imaging method based on binocular vision matching fusion. The imaging process of the left-eye camera and the right-eye camera in binocular vision system is realized, using ghost imaging algorithm, and its weak signal imaging characteristics can effectively compensate the parallax between the left-eye camera
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Nanosecond Pulse Generation in the C-Band Region Using Silver Sulfide as a Saturable Absorber J. Russ. Laser Res. (IF 0.9) Pub Date : 2024-03-15 Norizan Ahmed, Nur Farhanah Zulkipli, Nurhaffizah Hassan, Rosmawati Shafie, Syazilawati Mohamed
We successfully demonstrate the generation of nanosecond pulses in a passively Erbium-doped fiber laser (EDFL) by an Ag2S-based saturable absorbeer (SA). A simple and low-cost liquid phase exfoliation (LPE) method is used to fabricate the SA. Through LPE, the SA element is coated onto a thin film of polyvinyl alcohol (PVA), which serves as the host material. The Ag2S SA film exhibits good nonlinear
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Research on a Broadband Compact Polarization Beam Splitter J. Russ. Laser Res. (IF 0.9) Pub Date : 2024-03-15
Abstract Many devices based on silicon and other photonic integrated circuit platforms exhibit significant polarization dependence. Polarization beam splitter (PBS) is a device that split optical signals into transverse electric (TE) and transverse magnetic (TM) modes. Among various PBSs, asymmetric directional couplers are widely used due to their fine performance, but their working bandwidth is limited
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Numerical Simulation and Experimental Study of Nanosecond Pulsed Laser Cleaning of Aluminum Alloy Surface Paint Layer J. Russ. Laser Res. (IF 0.9) Pub Date : 2024-03-15 Tanghao Wang, Shanman Lu, Hanqi Liu, Jun Ying, Wei Zhang
In this paper, we present a finite element model that utilizes simulation software to simulate the process of moving nanosecond pulsed laser cleaning on the surface paint layer of 2A12 Aluminum alloy. The objective is to analyze the impact of different laser parameters on the distribution of temperature field within both the paint layer and the substrate surface. Furthermore, we perform experimental
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Nonlinear Optical Properties of Plasmon–Exciton Nanostructures Based on PbS Quantum Dots and Gold Nanorods in the Field of Nanosecond Laser Pulses J. Russ. Laser Res. (IF 0.9) Pub Date : 2024-03-14 A. I. Zvyagin, T. A. Chevychelova, K. S. Chirkov, M. S. Smirnov, O. V. Ovchinnikov, E. P. Denisova
We present the results of our study of nonlinear optical response observed in plasmon–exciton nanostructures based on PbS quantum dots passivated with thioglycolic acid and gold nanorods under the influence of 10 ns second harmonic pulses (532 nm) of Nd3+:YAG laser. We show that the association of components of a hybrid nanostructure leads to increase in the reverse saturable absorption in PbS quantum
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Temperature Dependence of the Linewidths and Amplitudes of the Sub-Doppler Resonances of 87Rb D2 Line Detected with σ(σ)-Polarized Pumping and Probe Laser Beams J. Russ. Laser Res. (IF 0.9) Pub Date : 2024-03-11
Abstract We asses impact of the temperature of 87Rb atoms on the linewidths and amplitudes of the F = 1 → F′ = 0, 1, 2 and F = 2 → F′ = 1, 2, 3 hyperfine resonances of the 87Rb D2 line, using the circularly-polarized pumping beam and the probe laser beam. To achieve high-precision and accuracy, frequency-stabilized narrow-linewidth extended-cavity diode lasers, we employ a temperature-controlled Fabry–Pérot
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Population Distribution and Splitting Nonlinearity for Rydberg Atomic Gas under Multiple Fields J. Russ. Laser Res. (IF 0.9) Pub Date : 2024-03-11 Chao Li, Guo Ma, Yunyun Zhang, Shengzhao Wang
Rydberg atom has a very large polarizability proportional to n7 (n is the principal quantum number), the energy interval between adjacent energy levels is in the microwave frequency band, and the transition between adjacent energy levels has a huge dipole moment proportional to n4; as a result, the Rydberg atom is extremely sensitive to the external field, making it an important means of microwave
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Laser-Induced Hyper-Sound Surface Acoustic Waves as a Probe of Extended Defects in Crystalline CdZnTe J. Russ. Laser Res. (IF 0.9) Pub Date : 2024-03-08
Abstract For CdZnTe crystals containing extended defects – coherent and incoherent twin boundaries, as well as lamellar systems of twins, we measure the propagation patterns of surface acoustic waves (SAW) in the gigahertz range excited by a sharply focused femtosecond laser pulse. Comparison of the calculated SAW radial velocities with experimental data allows us to determine the local crystallographic
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Probability Representation of Nonclassical States of the Inverted Oscillator J. Russ. Laser Res. (IF 0.9) Pub Date : 2024-03-08 Matyas Mechler, Margarita A. Man’ko, Vladimir I. Man’ko, Peter Adam
We determine the evolving probability representations of several important nonclassical states of the inverted oscillator by applying the method of integrals of motion for this system. The considered nonclassical states initially prepared in the potential of the harmonic oscillator are even and odd Schrödinger cat states, squeezed coherent states, and lattice superpositions of coherent states. The
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The Physical Transient Spectrum and Squeezing of a Three-Level Atom Interacting with Two-Mode Field in Finite Pair Coherent State in the Presence of a Classical External Field J. Russ. Laser Res. (IF 0.9) Pub Date : 2024-03-08 A.-S. F. Obada, E. M. Khalil, S. Sanad, H. F. Habeba
We investigate effects of a classical external field and the initial state of the field on the nonlinear interaction of a Λ-type three-level atom with the two-mode field through the Raman type interaction. Appropriate canonical transforms are performed for atomic states. The analytic solution to the model is obtained, using the Schrödinger differential equation. The wave function is obtained under
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Passive Q-Switching of a Cladding Pumped Erbium–Ytterbium Co-Doped Fiber Laser Induced by the Kerr Effect J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-12-04 Mingzhi Chi, Zhan Hong Lip, Ahmad Haziq A. Rosol, Xiau San Cheng, Zian Cheak Tiu, Moh Yasin, Sulaiman Wadi Harun
In this letter, we propose a passively Q-switched all-fiber laser and demonstrate how to utilize a multimode double-clad Erbium–Ytterbium co-doped fiber as an active medium. The Q-switching is obtained based on the Kerr effect of multimode interference, which induced intensity modulation inside the linear cavity laser. Stable Q-switched pulses are obtained at 1552.3 nm with the repetition rate varying
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An Efficient Method for Determining the Output Plane of a Small-Sized Phase Object in Application to Its Image Processing J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-12-04 E. V. Parkevich, A. I. Khirianova, T. F. Khirianov, K. T. Smaznova, D. V. Tolbukhin, Ya. K. Bolotov, S. A. Ambrozevich
We propose an efficient method for determining the position of the output plane of a phase object, which is registered by a lens system in the presence of a defocusing effect. The method involves the simultaneous employment of 2D diffraction maps of the diffracted wave constructed for its forward and inverse directions of propagation relative to the object output plane. We show that the resultant diffraction
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Explorative Research on 100 mW Magnitude Optical Frequency Transmission Via Fiber J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-11-29 Jing Gao, Linbo Zhang, Xue Deng, Dongdong Jiao, Xiang Zhang, Qi Zang, Mengfan Wu, Guanjun Xu, Ruifang Dong, Tao Liu, Shougang Zhang
In this work, we investigate the optical frequency transmission with a magnitude of 100 mW through a 20 m polarization-maintaining fiber, using the phase noise compensation method. In order to minimize potential noise caused by stray light reflections in the fiber, we incorporate two acoustic-optic modulators to spectrally separate the heterodyne signal, effectively suppressing these sources of noise
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Optical and Color Modification in Polycarbonate/ZnS-NiO Nanocomposite Films Due to Laser Exposure J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-11-29 Samir A. Nouh, Eman M. Mahrous, Faten AlSomali, Rehab Yajzey, Kaoutar Benthami, Ghada Abbady
We fabricate a nanocomposite (NC) of polycarbonate (PC), Zinc sulfide (ZnS) and Nickel oxide (NiO) nanoparticle by the sol-gel and ex-situ casting processes. We trust that this study is novel in the area of the impact of laser on such NC. The Rietveld alteration of XRD records indicates that both the prepared ZnS and NiO have a nano-nature of an average particle size of 4 and 18 nm. Samples of the
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Microstructure and Properties of Laser Cladding Graphene Reinforced CoCrFeNiTi High-Entropy Alloy J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-11-29 Xingwu Qiu
The graphene (Gr) reinforced CoCrFeNiTi high-entropy alloys (HEAs) were prepared, using laser cladding technology based on CO2 gas laser. The effect of Gr on microstructure, mechanical properties, and corrosion resistance of the HEAs is studied. The experimental results indicate that the main microstructure of Gr/CoCrFeNiTi HEAs is equiaxed grains, with precipitated phases filled between the grains
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Theoretical Analysis of Space and Wavelength Division Multiplexing Er3+/Yb3+ Co-Doped Seven-Core Fiber Amplifier J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-11-29 A. Nassiri, M. Elmouaddine, A. Boulezhar, H. Idrissi-Saba
Space division multiplexing (SDM) Erbium/Ytterbium (Er3+/Yb3+) co-doped seven-core fiber amplifier is one of the potential configurations used to accommodate the rapid development of the capacity of optical fiber transmission systems. To increase the demand transmission capacity and enhance the gain characteristics limited by only Erbium-doped multicore fiber amplifier for SDM-WDM system, we propose
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Design and Analysis of Holmium-Doped Fiber Amplifier for WDM System in 1990 – 2100 nm Wavelength Range at Higher Bit Rates J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-11-25 Hafiz Muhammad Obaid, Kinzah Noor, Maaz Tahir Malik, Abdul Rehman
In this paper, we focus on the performance optimization of Holmium-doped fiber amplifier (HDFA) for wavelength-division-multiplexed (WDM) optical communication system in the 1990 – 2100 nm wavelength range at higher bit rates. We investigate the proposed amplifier for 12×100 Gb/s WDM system at channel spacing of 10 nm. An average gain and noise figure of 32.17 and 8.2 dB, respectively, are obtained
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Efficient Continuous-Wave Deep-Red Pr :YLF Laser Double-Pass-Pumped by a Fiber-Coupled Blue Laser Diode J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-11-25 Wensheng Zhang, Yuanyuan Liu, Hong Liang
We present an efficient continuous-wave deep-red Pr :YLF laser with a double-pass-pumping architecture. The fiber-coupled blue laser diode is used as the pump source. With an incident pump power of 15.3 W, the deep-red Pr :YLF laser reaches the 5.02 W output power at 720.8 nm, corresponding to a slope efficiency of 40.2%. In addition, we estimate the beam quality factor to be about 2.0.
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Kerr Effect as a Mode Locker in Er-Doped Fiber Laser J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-11-25 Yu Chen, Ahmad Haziq A. Rosol, Sin Jin Tan, Zian Cheak Tiu, Kaharudin Dimyati, Sulaiman Wadi Harun
We propose and demonstrate a passively mode-locked all-fiber laser utilizing a multimode interference effect in graded-index multimode fiber (GIMF). The mode-locking is obtained due to the Kerr effect in GIMF, which induces the intensity modulation inside the ring cavity laser. We obtain stable soliton mode-locked pulses at a center wavelength of 1574.1 nm, with a fixed repetition rate of 22 MHz and
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A Visible and Infrared Image Fusion Method Based on Ghost Imaging J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-11-25 Ye Hualong
In the natural light imaging scene, it is often illuminated by a variety of wavelength light sources. To obtain images with better robustness and richer information, in this paper, we propose a method of visible and infrared image fusion based on ghost imaging, which fully combines the advantages of visible and infrared imaging. In fact, two single wavelength illumination information and detection
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Interaction of Terahertz Radiation Pulse with a Plasma Layer in a Magnetic Field J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-11-24 Vyacheslav E. Grishkov, Polina D. Trofimova, Sergey A. Uryupin
We consider the interaction of Gaussian pulse of electromagnetic radiation with a plasma layer located in a constant magnetic field directed along the layer boundaries. We show that, when exposed to a long pulse, the transmitted pulse amplitude decreases due to a partial reflection from the layer boundaries and the influence of electron collisions. When exposed to a short pulse, in the case where the
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An Apertureless Scanning Near-Field Optical Microscope Probe with a Lateral Resolution of 10 – 15 nm Observed with a Semiconductor Structure J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-11-24 D. V. Kazantsev, A. V. Klekovkin, I. I. Minaev, E. A. Kazantseva, S. N. Nikolaev
Using InSb/GaSb semiconductor quantum dots, we demonstrate the lateral spatial resolution of scattering apertureless near-field microscope equal to 10 – 15 nm at a wavelength of λ = 10.7 μm provided by a single-mode CO2 laser. The measurement conditions make it possible to undoubtedly exclude any artifacts caused by the sample topography and other similar factors. We identify the strongly localized
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Effect of Geometric Parameters of Metallic Nanoprisms on the Plasmonic Resonance Wavelength J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-11-24 Alexey D. Kondorskiy, Arseniy V. Mekshun
We study the effect of geometric dimensions on the optical properties of equilateral triangular gold and silver nanoprisms with rounded corners. An analytical expression for calculating the spectral characteristics of the main longitudinal plasmonic resonance of such nanoprisms is obtained. As variables, the expression includes the nanoprism dimensions, its composition, and the permittivity of the
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Theoretical Analysis of Resonant Hyper-Raman Scattering of Light by 2 LO Phonons in a CdS Crystal J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-11-24 Ludmila E. Semenova
We theoretically study resonant hyper-Raman scattering of light by 2 LO phonons in a CdS crystal with the wurtzite structure. The scattering process involving the two-photon dipole transitions to B and C excitons of the s-type is considered. The different sequences of intermediate states are taken into account. It is shown that the inclusion of the possible dipole transitions to the deeper valence
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A Small-Size 3d Object Detection Network for Analyzing the Sparsity of Raw Lidar Point Cloud J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-11-24 Bo Zhang, Haosen Wang, Suilian You, Chengfeng Bao, Shifeng Wang, Bo Lu, Jonghyuk Kim
LiDAR is one of the main sensors for 3D object detection in autonomous driving. LiDAR has the advantages of high precision and high resolution, but as the distance increases, the points it acquires become sparse, resulting in uneven sampling points and hindering the feature extraction of discrete objects. Current 3D object detection methods using LiDAR ignore the sparse features of the original LiDAR
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Tuning the efficiency of Random Laser Generation in a Suspension of ZnO Nanoparticles by Means of its Directional Freezing J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-11-23 S. F. Umanskaya, M. A. Shevchenko, N. V. Tcherniega, A. N. Maresev, A. A. Matrokhin, M. A. Karpov, V. V. Voronova
In this paper, we introduce a novel approach to control the random lasing based on multiphoton luminiscence in Zinc oxide (ZnO) nanoparticle water suspension during its guided freezing process. The freezing process leads to the formation of a particle layer on the ice surface, consequently reducing the photon’s scattering mean free path in the medium, as well as increase in the efficiency of the second
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Coupled Nonlinear Optical Processes During Absorption by Manipulating the Induced Cubic Susceptibility J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-11-23 Rena J. Kasumova
We present a theoretical study of the experimentally proved fact that, in perspective nonlinear materials with an absorption band in the tuning frequency range, two simultaneous three-wave processes are realized – optical parametric generation and generation of the second harmonic of an idler wave. The analysis is carried out, taking into account the depletion of the pump wave, the phase mismatch,
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Exploring the Survival and Sudden Death of Quantum Correlations in an Open Atomic Laser System J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-11-23 Ebisa Mosisa Kanea, Chimdessa Gashu Feyisa
We focus our study on the quantum correlations of coupled photon pairs produced in an open atomic laser system, where quantum coherence is brought about by the superposition of a coherent atomic state and a coherent classical field. Quantum properties produced by photon–photon correlations are a long sought-after goal in quantum information science and technology, because photons combine at room temperature
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A Prototype Model of Laser Radar J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-11-23 Niranjan Kumar, Srest Somay
We examine and test in the laboratory our laser pulse remote sensing system, based on the number of cycles of a local oscillator. We calculate the range of an object, using a peak transmission power of 2 mW from a Mesa HP-pumped He–Ne laser with a pulse frequency of 3 kHz and a pulse width of 150 ns; also, we establish a correlation between the counted cycle and the laser wavelength. The results of
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Tantalum Selenide Micro-Wafer Terahertz Emitter J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-11-23 Chuanxiang Ye, Jintao Wang
Terahertz waves possess distinct characteristics, including such as transience, coherence, low energy, penetration, and fingerprint spectroscopy, which render them well-suited for a diverse range of applications in security inspection, nondestructive testing, and environmental detection. However, the efficiency of terahertz wave generation remains constrained by the terahertz source. To address this
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Controlled Optical Contrast Caused by Reversible Laser-Induced Phase Transitions in GeTe and Ge2Sb2Te5 Thin Films in the Spectral Range from 500 to 20,000 nm J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-11-23 Anton A. Burtsev, Alexey V. Kiselev, Vitaly V. Ionin, Nikolay N. Eliseev, Mariya E. Fedyanina, Vladimir A. Mikhalevsky, Alexey A. Nevzorov, Oleg A. Novodvorsky, Andrey A. Lotin
In this paper, we present the results of an experimental study of the controlled contrast of optical properties of Germanium Telluride (GeTe) and Germanium Antimony Telluride (Ge2Sb2Te5 or GST) 100 nm thin films, caused by laser-initiated reversible phase transitions from the amorphous-tocrystalline state, and vice versa. We demonstrate a high contrast in the transmissivity and reflectivity spectra
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Maxwell–Boltzmann and Druyvesteyn Distribution Functions Expressing the Particle Velocity and the Energy in Sheath Plasmas J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-11-23 Pawan K. Tiwari, Ravindra Kumar, Kritika Halder, Yeon Soo Lee
The energy distribution of particles in a gaseous system is well understood through the implementation of a statistical tool, namely, the Maxwell–Boltzmann distribution function in the velocity–space coordinate system. The Maxwell–Boltzmann distribution function is utilized to investigate the velocity distribution of plasma particles like electrons, assuming that their collision frequency does not
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Broadband High-Resolution Stigmatic Spectral Imaging in the XUV Range J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-08-29 A. O. Kolesnikov, A. N. Shatokhin, E. A. Vishnyakov, E. N. Ragozin
We describe the experimental implementation of high-resolution soft X-ray spectrographs, which are stigmatic throughout their operating range. The optical configuration comprises a grazing-incidence plane VLS grating and a broadband normal-incidence focusing mirror with an aperiodic multilayer coating structure. The operating range is defined by the aperiodic multilayer mirror in use (Mo/Si: 12.5 –
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Effect of Fast Axial Flow CO2 Laser Processing Parameters on Graphene/AlxCoCrNiTi High Entropy Alloy J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-08-29 Xingwu Qiu
The energy distribution characteristics of fast axial flow CO2 lasers demonstrate that they are often used for cutting and welding metal materials, and it is generally believed that they are not suitable for material heat treatment. In order to expand the application range of these lasers, we prepare graphene (Gr) reinforced high entropy alloy (HEA) coatings, employing this type of laser under loworder
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Development of Nano-Photonic Structure for Implementation of Frequency Encoded Two-State Pauli X Gate J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-08-29 Ayan Dey, Suranjan Lakshan, Sourangshu Mukhopadhyay
We develop an all-optical two-state Pauli X logic gate, using two-dimensional nano-photonic crystals (PhCs) based on photonic-crystal semiconductor optical amplifier switches (pc-SOA). An all-optical two-state Pauli X logic gate device is implemented by exploiting the cross-gain modulation property of pc-SOA (XGM) and the frequency encoding technique, which is constructed using a nano-structured p
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Diffraction Losses of a Dielectric Open Resonator J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-08-26 Alexei V. Popov, Marina N. Popova
This paper was stimulated by the experimental studies of solid-state lasers initiated by N. G. Basov and carried out at the Laboratory of Luminescence of the P. N. Lebedev Physical Institute under the direction of M. D. Galanin and A. M. Leontovich in the 1960-ies. Here, the classical parabolic equation method is extended in order to calculate complex eigenfrequencies of optical oscillations in a dielectric-filled
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High-Energy Nd :YAG Laser Technology Based on Dust-Cloud Pyrotechnic Pumping J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-08-26 Wei Jiang, Caiguo Zheng, Cheng Ye, Zao Yi, Fusheng Zheng, Yongjian Tang
To overcome the low efficiency of traditional pyrotechnic solid-state laser energy conversion, we design a dust cloud pyrotechnic-pumped Nd :YAG laser based on the thermal radiation model and Lambert–Beer law, which effectively addresses the issue of self-absorption during the combustion of traditional pyrotechnic compositions. Therefore, the laser output energy increases significantly. A laser energy
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Formation of Low-Coherent Beams in Nd:YVO4 and Nd:YAG Lasers J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-08-26 Alexey L. Koromyslov, Yuri V. Senatsky
Lasers with low-coherent radiation have attracted the attention since the first publications on this topic in the 1960s and up to the present time, thanks to their numerous applications. Compact lowcoherent lasers with a flow of the active medium through the pumped region can be done, using dense mixtures of solid particles and a liquid – slurry lasers. The preparation of slurry compositions based
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High-Sensitivity Two-Core Dual-Polarization Photonic-Crystal-Fiber Surface-Plasmon-Resonance Sensor Based on Indium Tin Oxid J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-08-26 Nan Cui, Honggang Pan, Ailing Zhang, Zihong Zhao, Zhipan Chen, Bo Zhang, Sihang Lin, Guangxiao Cao
In this paper, we propose a high-sensitivity two-core dual-polarization photonic-crystal-fiber surfaceplasmon-resonance (PCF-SPR) sensor based on Indium Tin oxide (ITO). ITO is a conductor material with adjustable photoelectric properties and low losses in the infrared range, and the two-core structure could better direct the incident light to the metal surface to enhance the coupling. According to
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Evolution Properties of a Partially Coherent Laguerre Pulsed Vector Vortex Beam in a Turbulent Atmosphere with Anisotropy J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-08-26 Bangzhuo An, Yonggen Xu, Wenli Liu, Nianchi Hao, Yongtao Liu, Xueru Deng
Based on the extended Huygens–Fresnel principle, we derive the analytical expression of the crossspectral density matrix of a partially coherent Laguerre pulsed vector vortex beam (PCLPVVB) propagating through isotropic and anisotropic atmospheric turbulence. Our outcomes reveal that the atmospheric turbulence affects the evolution of spectral intensity distribution of PCLPVVB, and the beam quickly
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Comparative Study of Two Definitions of the Turbulent Distance for Laser Beams Propagating Through Non-Kolmogorov Atmospheric Turbulence J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-08-26 Yongping Huang, Zhichun Duan, Xingyong Huang, Shiwei Xie
Using two definitions of the turbulent distance to characterize the laser beam propagation through atmospheric turbulence, we derive a general analytical expression for the beam spread η depending on the turbulence parameter T(α) with the generalized exponent α and on the initial second-order beam moments in the z = 0 plane. Larger values of η correspond to a larger influence of atmospheric turbulence
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Doped Effects of Quaternary AlInGaN Last Quantum Barrier for Deep-Ultraviolet Laser Diodes Without Electron Blocking Layer J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-08-26 Mengshuang Yin, Xien Sang, Yuan Xu, Fang Wang, Juin J. Lion, Yuhuai Liu
In this work, we investigate the performance of doped quaternary AlInGaN last quantum barrier (LQB) of deep-ultraviolet laser diodes (DUV LDs) without the electron blocking layer (EBL). The results indicate that the stimulated radiation recombination rate of the n–p-doped LQB structure increases. Compared with the undoped LQB structure, the threshold current of the n–p-doped structure of quaternary
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Beam Propagation Factor of a Partially Coherent Twisted Elliptical Vortex Beam in Inhomogeneous Atmospheric Turbulence J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-08-26 Wenli Liu, Yonggen Xu, Bangzhuo An, Qian Xu, Nianchi Hao, Yongtao Liu
Based on the extended Huygens–Fresnel principle and the second-order moments of the Wigner distribution function (WDF), we derive the analytical formulas for the root-mean-square (rms) spatial width, rms angular width, and M2-factor of a partially coherent twisted elliptical vortex beam (PCTEVB) propagating through the inhomogeneous atmospheric turbulence. The spatial spreading, angular width, and
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A Parametric Study on the Effects of the Electrode Size on the Performance of a Small-Size RF-Excited Fast-Axial-Flow CO2 Laser J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-08-26 K. Silakhori, R. Neshati, D. Esmaeilpour Ghoochani, F. Kazemyzade, M. Ilchi, M. Talebi, Z. Rajabi, Z. Pourhasan Nezhad
We construct and characterize a small-size fast-axial-flow RF-excited CO2 laser. The laser, including a pair of 10 cm long electrodes symmetrically positioned around a quartz tube, is driven by an RF generator with the 1 kW maximum power at a frequency of 13.56 MHz. The output power and efficiency of the laser are experimentally measured under different structural and operational conditions, such as
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Generation of Picosecond Pulses in Erbium-Doped Fiber Lasers Via Mode Locking Using V4AlC3 Thin Film J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-08-26 Nur Zulaikha Mohd Safuan, Ahmad Haziq A. Rosol, NurFarhanah Zulkipli, Moh Yasin, Sulaiman Wadi Harun
Short pulses are showing increasing importance in various industrial and scientific applications. Here, we exploit the saturable absorption of a ternary layered MAX-phase compound of Vanadium Aluminum carbide (V4AlC3) to produce mode-locked pulses in Erbium-doped fiber-laser (EDFL) cavity. The V4AlC3 composite thin film with a modulation depth of 24% is successfully obtained by embedding the commercial
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High-Sensitivity All-Optical Pressure Sensor Based on Photonic-Crystal Nanotechnology J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-07-13 Kouddad Elhachemi, Dekkiche Leila
In this study, we investigate a new design of a high-sensitivity photonic-crystal pressure sensor (PCPS). The basic structure consists of a triangular array of silicon rods suspended in air. The designed sensor comprises two quasilinear waveguides that are coupled through a resonant cavity. The detection principle is based on the change in the refractive index of the Si material as a function of the
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The Ti3SiC2 Max Phase Material for Q-Switched Pulse Generation J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-07-13 M. A. A. B. Sahib, Rozalina Zakaria, Nur Farhana Zulkipli, Ahmad H. A. Rosol, Moh Yasin, Sulaiman Wadi Harun
We report the feasibility of a Ti3SiC2 MAX phase material as absorber for Q-switched pulse generation in the 1550 nm region. The proposed saturable absorber (SA) is fabricated by embedding Ti3SiC2 particles into polyvinyl alcohol (PVA) thin film and incorporated into Erbium-doped fiber laser (EDFL) cavity via a sandwich-structured fiber-ferrule platform. The SA thin film exhibits a linear absorption
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AlGaN-Based Deep-Ultraviolet Laser Diodes with Quaternary AlInGaN Last Quantum Barrier J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-07-13 Mengshuang Yin, Aoxiang Zhang, Xien Sang, Yuan Xu, Fang Wang, Juin J. Lion, Yuhuai Liu
We propose the quaternary AlInGaN last quantum barrier (LQB) structure to improve the performance of deep-ultraviolet (DUV) laser diodes (LDs). Here, we investigate three LQB structures – Al0.63In0.03Ga0.34N LQB, Al0.65In0.03Ga0.32N LQ band, and Al0.68In0.03Ga0.29N LQB. We find that the Al0.68In0.03Ga0.29N LQB structure significantly reduces the electron leakage in the p-region, improves the carrier
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Experimental Studies of the Influence of Scintillation on a FSO Communication System for Visible and Infrared Wavelengths J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-07-13 Shibabrata Mukherjee, Sujoy Paul, Saswati Mazumdar
On the “Free Space Optical” (FSO) communication link, the atmospheric scintillation phenomena play a crucial role. The severity of the scintillation can seriously impair the FSO link’s performance. In this article, we consider two wavelengths of FSO link, visible (638 nm) and infrared (980 nm), and measure their performances in a developed artificial scintillation simulation chamber, with the severity
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Study of Transient Thermal Effects in a Nd :YAG Laser Under Quasi-Continuous Laser-Diode End Pumping J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-07-13 Peijin Shang, Lu Bai, Shiyu Wang
We develop a quasi-steady-state thermal model to analyze transient thermal effects in a Nd :YAG laser rod under quasi-continuous laser-diode (LD) end pumping. Included is a quasi-adiabatic model for pump durations and a quasi-steady-state heat dissipation model for pump-free durations. We give an approximate expression of the transient temperature-difference distribution function of the crystal under
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Tunable and Switchable Low-Threshold Multi-Wavelength Erbium-Doped Fiber Pulsed Laser Based on Lyot Filter and NOLM J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-07-13 Honggang Pan, Zhipan Chen, Ailing Zhang, Bo Zhang, Yaomei Peng, Zhanzhi Liu, Qianxu Wang, Nan Cui, Junpeng Zhou
We experimentally demonstrate a tunable and switchable low-threshold multi-wavelength erbiumdoped fiber pulsed laser. It is based on a composite structure of Lyot filter and nonlinear optical loop mirror. At a threshold of 30 mW, single-wavelength and dual-wavelength states can be obtained with a tuning range of 5 nm for the single wavelength and 1 nm for the dual wavelength. By adjusting the pump
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341 W Continuous-Wave Dual-End-Pumped Tm:YAP Slab Laser J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-07-13 Qunlong Long, Jimeng Gao, Qingwen Han, Lei Wang, Yong He, Yefei Mao
In this study, we demonstrate a high-power continuous-wave (CW) Tm:YAP slab laser that is endpumped by laser diodes in a dual-end-pumped configuration. The laser delivers an output power of up to 341.6Wat 1.99 μm, corresponding to a slope efficiency of 49.4% and an optical-to-optical conversion efficiency of 41.6% with respect to the total incident pump power of 822 W. To our knowledge, this is the
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High-Resolution Single-Photon Imaging with a Low-Fill-Factor 32×32 SPAD Array by Scanning in the Photosensitive Area J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-07-13 Hengshuo Guo, Yahui Li, Guilong Gao, Gang Wang, Mengmeng Yue, Chao Ji, Di Wang, Xiaoqiang Feng
Single-photon light detection and ranging (LiDAR) provides the single-photon sensitivity and picosecond time resolution, which is rapidly developing in three-dimensional (3D) imaging applications. Spatial resolution and imaging quality of LiDAR based on the single-photon avalanche-diode (SPAD) array detectors are difficult to improve, because currently available SPAD arrays still have small size array
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Thermal Analysis of HO : CaF2 Crystal Pumped by 1.9 μm Laser Diode J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-07-13 Huanhuan Min, Xiaohu Han, Lulu Gao, Xuejun Zhai, Guanghua Liu, Ruijun Lan, Yingjie Shen
In this paper, we establish a three-dimensional heat conduction and thermal stress model of a bulk crystal. Based on planar strain assumption of solid-state lasers, we study the thermal conduction and thermal stress of the bulk Ho : CaF2 laser-medium end-pumped by the Gaussian beam. We establish a thermal model of the plate crystal with complex boundary conditions and discuss the effect of pump energy
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Excitation Dynamics of Interacting Rydberg Atoms in Lithium Magneto-Optical Trap J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-07-13 Sergey A. Saakyan, Vladimir A. Sautenkov, Stepan V. Klimov, Alexander A. Nazarov, Andrey A. Bobrov, Boris B. Zelener
We study the time-resolved Rydberg excitation dynamics for Lithium atoms confined in a magneto-optical trap. Loss of neutral atoms due to Rydberg excitation is measured by means of analyzing the absorption of a weak probe beam. Our experiment demonstrates the existence of both density-dependent excitation blockade and excitation facilitation effects. Moreover, we measure the frequency shift of the
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The Third Closed-Loop Control for Compensating Light Power Fluctuations in the Interferometric Fiber-Optic Gyroscope J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-07-13 Shijie Zheng, Mengyu Ren, Xin Luo, Hangyu Zhang, Guoying Feng
In the interferometric fiber-optic gyroscope (IFOG), the stability of the light source is crucial. The fluctuations of light source power (LSP) do greatly compromise the performance of IFOG. When the driving current of the light source has fluctuations of about 0.5 to 2 mA, the bias stability of the gyroscope becomes 2 to 3 orders of magnitude worse. However, simplifying the light source is an important
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Effects of Plasma Plumes by Pulsed Laser Irradiating Centimeter-Level Space Debris J. Russ. Laser Res. (IF 0.9) Pub Date : 2023-07-13 Yingwu Fang
Our aim in this paper is to address the effects of plasma expansion plumes by pulsed laser irradiating the centimeter-level space debris. A dynamic model of centimeter-level space debris irradiated by pulsed laser was established based on the finite element method (FEM), and the evolutionary processes and dynamics of plasma expansion plumes were simulated by COMSOL platform. Based on the simulation