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How many sessions of quantum key distribution are allowed from the first launch to the next restart of the system? Laser Phys. (IF 1.2) Pub Date : 2024-02-26 S N Molotkov
Quantum cryptography systems are systems for extending the initial start key, which is required at the start of the system, to ensure information-theoretic authentication of messages in the classical communication channel. In subsequent sessions, a quantum key is generated, part of which is used for authentication in subsequent sessions. There is a fundamental question for quantum cryptography—how
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Hybrid modeling and optimization of fiber laser hole cutting of austenitic stainless-steel sheets using response surface Laser Phys. (IF 1.2) Pub Date : 2024-02-22 Zhenhua Niu, Mohammad Hossein Razavi Dehkordi, Mohammadreza Ghazi, Mohammad Akbari
In this study, an efficient approach was proposed to systematically model and optimize the laser small hole cutting process parameters using a hybrid approach for the design of experiment and multi-objective genetic algorithm optimization. The central composite design and response surface methodology were used to effectively model the impact of four main factors: cutting speed, laser power, gas pressure
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Study on the spectra of Tieguanyin tea and ash by laser-induced breakdown spectroscopy Laser Phys. (IF 1.2) Pub Date : 2024-02-15 Jingwen Li, Lixing Yao, Li Shen, Cong Wang
Tea ash is the inorganic residue of tea after a series of chemical and physical reactions under high temperature environment. The compositions of tea and ash are very different. In addition, the compositions of ash are closely related to the quality of tea. In this work, the compositions of Tieguanyin tea and ash were analyzed by laser-induced breakdown spectroscopy (LIBS), and the differences of elements
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Effects of detuning on entropic uncertainty bound and quantum correlations in dissipative environments Laser Phys. (IF 1.2) Pub Date : 2024-02-15 Shahram Mehrmanesh, Maryam Hadipour, Soroush Haseli
One of the fundamental arguments in quantum information theory is the uncertainty principle. According to this principle, two incompatible observables cannot be measured with high precision at the same time. In this work, we will use the entropic uncertainty relation in the presence of quantum memory. Considering a dissipative environment, the effects of the detuning between the transition frequency
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Mode-locked thulium-doped fiber laser using a stretched few-mode fiber as a saturable absorber Laser Phys. (IF 1.2) Pub Date : 2024-02-15 Xiuqi Wang, Mengping Zhong, Huanhuan Li, Kunyang Wang, Can Li, Junjie Zhang, Shiqing Xu
In this work, an all-fiber saturable absorber (SA) based on nonlinear multimode interference in a short few-mode fiber (FMF) was proposed. Saturable absorption in this all-fiber device was demonstrated with an absorption modulation depth and a saturation fluence of 14.3% and 55.6 μJ cm−2, respectively. A stable mode-locking operation was observed in a thulium-doped passively mode-locked fiber laser
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Passively mode-locked Er-doped fiber laser with single and double wavelength pulses based on germanene saturable absorber Laser Phys. (IF 1.2) Pub Date : 2024-02-13 Jiashuai Ding, Xueyao Liu, Tuo Li, Xiaofeng Zou, Yanfeng Yu, Nannan Xu, Xinxin Shang, Hua Lu, Chen Cheng, Pu Huang, Huanian Zhang, Dengwang Li
In this paper, we focus on the single crystal material germanium (Ge), which is fabricated into saturable absorbers (SAs) employing liquid phase exfoliation, and validate it with an erbium-doped fiber laser (EDFL). The Ge SA was obtained with a modulation depth of 9.8% and a saturation intensity of 11.02 MW cm−2. The single-wavelength mode-locked pulse with a minimum pulse width of 847 fs was obtained
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The influence of Ohmic noise on the dynamics of three-spin open quantum system Laser Phys. (IF 1.2) Pub Date : 2024-02-12 Muhammad Javed, Sidra Salim, Sumayya Said, Khushnood Shah, Atta ur Rahman
The dynamics of open quantum systems under decoherence effects remain a hotly debated topic in the case of the practical deployment of quantum information processing. In this regard, we examine how the three-qubit mixed state is affected by changes in the cut-off frequency of the Ohmic spectral density in a harmonic reservoir. Specifically, the degree of quantum memory-assisted entropic uncertainty
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Self-focusing/defocusing of skew-cosh-Gaussian laser beam for collisional plasma Laser Phys. (IF 1.2) Pub Date : 2024-02-12 K Y Khandale, S S Patil, P T Takale, A S Patil, R T Patil, S D Patil, M V Takale
The inverse relationship between the linear increase in skewness parameter s and the domain’s width of the order of skewness n plays a vital role in both critical beam radius and propagation dynamics of skew-cosh-Gaussian (skew-chG) laser beams. The interplay between the skewness parameter s and the order of skewness n is explored analytically and graphically in the current study to unveil the complexity
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Investigation of renal calculi fragmented tracer particles in lithotripsy model by laser speckle technique Laser Phys. (IF 1.2) Pub Date : 2024-02-09 R Balamurugan, K Rathina
We have developed a laser sheet method to evaluate micro-sized fragmented calcium oxalate granular particles created kidney stones suspended in a Newtonian fluid in an in vitro model. These tracer particles are examined by laser optical techniques. An optical setup is configured with a laser sheet to conduct image velocimetry on these calcium oxalate seed particles in the urine environment. The experimental
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Belt conveyor speed detection based on fiber-optic Sagnac interferometer vibration sensor Laser Phys. (IF 1.2) Pub Date : 2024-02-01 Yaru Hou, Pingjuan Niu, Jia Shi, Yuan Xie, Mengyu Yang
With their long transportation distance and high productivity, belt conveyors are characterized as the main equipment for bulk material transportation in coal mines and other key industries. However, its speed detection method has always been an engineering challenge under harsh working conditions. In this work, the elastic-optical effect of the polarization-maintaining fiber is used to design a fiber
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Research on multi-image encryption method based on image scaling and ghost imaging Laser Phys. (IF 1.2) Pub Date : 2024-02-01 Guoqiao Qiu, Yiqiang Zhang, Leihong Zhang
Optical information processing technology itself is characterized by high speed and parallelism, while the wavelength of light is short and the loading information capacity is large. Therefore, optical encryption is of great significance in the field of image encryption. For multi-image encryption, a multi-image encryption system (ISK-MGI) based on image scaling and ghost imaging is proposed in this
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Resonant second-harmonic generation of self-focused oblique incident laser beam in plasma Laser Phys. (IF 1.2) Pub Date : 2024-01-31 Vinay Sharma, Vishal Thakur, Sushila Srivastava, Niti Kant
The present manuscript aims to realize the effect of self-focusing on second-harmonic generation (SHG) by oblique incident laser beams in plasma. When an intense laser beam is obliquely incident on the plasma, it is resolved into reflected and refracted components, and resonant SHG is produced in the reflected component on account of the self-focusing of the incident laser. With the help of paraxial
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Organic frame metal structure materials UIO-66 for picosecond ultrafast pulsed fiber lasers Laser Phys. (IF 1.2) Pub Date : 2024-01-30 Guanyun Ding, Yichao Zhang, Linshi Wang, Yuxian Zhang, Jianqi Huang, Kaiqi Liu, Yuyue Gu, Zhaogang Nie, Guanyu Liu
The UIO-66 studied in this paper exhibits unprecedented thermal stability with a very high surface area and mechanical strength. This unique combination of properties opens up a wide range of promising applications. Here, we investigate the saturable absorption effects and ultrafast photonic applications of UIO-66. It shows that UIO-66 could emerge as a novel nonlinear material for ultrafast optics
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Polarization state transition mechanism of light through turbid media by Monte Carlo simulation Laser Phys. (IF 1.2) Pub Date : 2024-01-25 Yuhu Ren, Jimo Jian, Wenjiang Tan, Jing Wang, Tao Chen, Haikun Zhang, Wei Xia
We study the propagation of polarized light through turbid media with high scattering coefficient (μ s = 50 cm−1) and disclose the physical processes involved in the evolution of Stokes vector. The results show that the components of the Stokes vector can be expressed as the superimposition of the generalized divergence and the generalized curl of the two orthogonal electric field vectors. The components
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Dynamic all-optical memory switching based on atomic optical bistable behavior in a three level Λ-type atomic system Laser Phys. (IF 1.2) Pub Date : 2024-01-18 Haiqiang He, Bixuan Fan, Min Xie
We theoretically investigate the atomic optical bistability (AOB) in a three-level Λ-type atomic system confined in a unidirectional optical ring cavity. The role of the intensity or detuning of the control field on AOB is explored, and results show that absorption, dispersion, and nonlinearity can be modified significantly by the control field due to quantum coherence and interference in multilevel
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Dynamic laser speckle study on the effect of TiO2 and SiO2 nanoparticles in coatings Laser Phys. (IF 1.2) Pub Date : 2024-01-17 R Balamurugan, A R Arul, H B Ramalingam, R Venckatesh
The coatings of TiO2 and SiO2 nanoparticles mixed with latex paint on the sample are studied. The sample coin is coated primarily with latex paint alone and then with additives such as TiO2 and SiO2 nanoparticles separately with the same percentage of concentration. The sample is illumined by a coherent source of light and produces tiny bright and dark fingerprints by the interference effect of the
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High power narrow linewidth fiber laser based on superfluorescent white noise modulation Laser Phys. (IF 1.2) Pub Date : 2024-01-09 X Shan, T Hou, F Li, R Zhu
High power narrow linewidth fiber lasers have important applications in the fields of national defense, military and industrial intelligent manufacturing. At present, the power enhancement of narrow linewidth lasers is limited by the nonlinear and thermal effects of fiber, among which the stimulated Brillouin scattering (SBS) effect is highly destructive due to its low threshold. The SBS effect is
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Ultra-broadband high-efficiency solar absorber based on Ti-GaAs-Au structure for UV to near-infrared spectral range Laser Phys. (IF 1.2) Pub Date : 2024-01-04 Jincheng Wang, Hengli Feng, Yang Gao
In this study, we propose an ultra-broadband solar absorber composed of a trapezoidal base, an outer circular ring, and four nano-cylinders. The absorber has a covered bandwidth range of 300–4000 nm and a temperature range of 373–973 K. The average absorptance within the mentioned wavelength range is over 96.52%, and the efficiency of solar energy thermal conversion is above 0.9 at 373–973 K under
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Quantum super-resolution with balanced homodyne detection in low-earth-orbit Laser Phys. (IF 1.2) Pub Date : 2023-12-28 Ronakraj K Gosalia, Robert Malaney, Ryan Aguinaldo, Jonathan Green
Quantum super-resolution involves resolving two sources below the Rayleigh limit using quantum optics. Such a technique would allow high-precision inter-satellite positioning and tracking on communication and navigation constellations. Due to the size, weight and power constraints typical of low-earth-orbit (LEO) satellites, a simple solution is often preferred. Here, we show that a balanced homodyne
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Wavelength-stabilized figure-of-9 thulium-doped all-fiber laser emitting 560 fs pulses Laser Phys. (IF 1.2) Pub Date : 2023-12-22 Moritz Bartnick, Gayathri Bharathan, Thorsten A Goebel, Ria G Krämer, Stefan Nolte, Camille-Sophie Brés
We demonstrate a figure-of-9 all-fiber thulium-doped laser (TDFL) that generates 560 fs long pulses at 1948 nm wavelength. In order to achieve self-starting passive mode-locking, we utilize an in-fiber Faraday rotator to induce a nonreciprocal phase shift. To the best of our knowledge, this is the first all-fiber TDFL that combines an artificial saturable absorber (SA) with a chirped fiber Bragg grating
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Manipulating helical phase of HHG vortex with atomic states Laser Phys. (IF 1.2) Pub Date : 2023-12-21 Kecheng Liu, Guizhong Zhang, Shenghua Zhang, Wei Shi, Jianquan Yao
By deploying the strong-field approximation theory, we perform numerical simulation on atomic high-order harmonic generation (HHG) of hydrogen and HHG vortices generated by hydrogen layer. Our results show that the atomic HHG spectra demonstrate peak-shifting and the helical phase of the HHG vortex can be manipulated with initial states of atoms, all ionized by oppositely polarized bicircular ω and
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Enhancing the capacity of quantum dense coding from correlated amplitude damping channel via non-Hermitian operation Laser Phys. (IF 1.2) Pub Date : 2023-12-08 Yang Leng, Fei Chen
Using the non-Hermitian operation approach, we propose a scheme to protect and enhance quantum dense coding from correlated amplitude damping (AD) decoherence. In contrast to the results of memoryless AD channel, we show that the memory effects play a significant role in the suppression of quantum dense coding sudden death. Moreover, we find that the damaged quantum dense coding can be effectively
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Tunable wide spacing all-fiber dual-wavelength holmium-doped fiber laser using a Lyot filter operating above 2 µm Laser Phys. (IF 1.2) Pub Date : 2023-12-08 H Ahmad, J W Chiam, M Z Samion, M K A Zaini, M Z Zulkifli, K Thambiratnam
In this work, we successfully demonstrated an all-fiber, dual-wavelength holmium-doped fiber laser (HDFL) with a tunable wavelength spacing range of 8 nm to 24 nm. The HDFL utilizes a Lyot filter to obtain a stable dual wavelength output, with the Lyot filter being constructed from a polarizer, a 20 m polarizing maintaining fiber (PMF) and two polarization controllers (PCs). The dual-wavelength HDFL
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Reconstruction method of computational ghost imaging under atmospheric turbulence based on deep learning Laser Phys. (IF 1.2) Pub Date : 2023-12-05 Jingyao Xia, Leihong Zhang, Yunjie Zhai, Yiqiang Zhang
Ghost imaging, as an emerging imaging method, has great advantages in harsh environment with its off-object imaging characteristics. In this paper, we use a turbulence model based compressive sensing computational ghost imaging system to simulate atmospheric turbulence, analyze the effects of various factors on the imaging results, and recover the images under extreme turbulence conditions using conditional
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Improved calculation of the Mie solution and the geometrical optics approximation for large droplets Laser Phys. (IF 1.2) Pub Date : 2023-12-05 Dmitrii N Gabyshev, Rodion M Ganopolsky
This article considers energy distribution of light inside a uniformly illuminated transparent water droplet. Two methods are used: the geometrical optics approximation and the Mie solution derived from wave optics. The authors describe in detail calculation algorithms suitable for efficient computer implementation and ways to improve them. In the limit for large droplets, both similarities and differences
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Structural changes in the crystal lattice in enamel under Er,Cr:YSGG laser irradiation and oven heated by Rietveld analysis Laser Phys. (IF 1.2) Pub Date : 2023-12-04 J S Rabelo Neto, P A da Ana, V L Mazzocchi, M E G Valério, D M Zezell
Changes in the crystal lattices and compositions of the dental enamel powders were evaluated after oven or Er,Cr:YSGG laser irradiation. A decrease in the Ca/P ratio to levels close to the ideal theoretical value of laser irradiation caused a considerable decrease in the hydroxyapatite crystallite size but without changes in the crystallographic phase. These changes alter the material, can affect the
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Laser speckle-based estimation of surface condition for designing quieter material Laser Phys. (IF 1.2) Pub Date : 2023-11-30 Mausumi Mahapatra, Priyanka P Singh, Ganeswar Nath
Laser speckle is a non-contact, non-interfering, non-destructive, rapid and controllable technique with a large area of coverage that has attracted much attention for surface analysis of materials. The emergence of different natural cellulosic materials as potential candidates for the replacement of synthetic ones is promising, but their sustainability from the point of view of material design is still
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Simulation of x-ray bremsstrahlung generation under vacuum heating of solid target electrons Laser Phys. (IF 1.2) Pub Date : 2023-11-30 O F Kostenko
An extended Brunel model of hot electron generation in nonrelativistic laser-plasma interactions is considered. The model takes into account the permittivity of the surface plasma and the energy absorbed by electrons accelerated by the electric field components perpendicular and parallel to the target. A model for the generation of x-ray bremsstrahlung in the case of a Gaussian laser beam is presented
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Impact of intensity error on temperature estimation in laser-induced breakdown spectroscopy: a numerical study Laser Phys. (IF 1.2) Pub Date : 2023-11-24 Lekha Mary John, K K Anoop
Laser-induced breakdown spectroscopy (LIBS) is a cutting-edge technique for the compositional analysis of multi-element materials. Under standard circumstances for laser-induced plasma (T e = 1 eV and N e = 1016 cm−3), we simulated the emission spectrum of a binary alloy (with 70 wt.% Cu–30 wt.% Al). We used the Saha ionization equilibrium formulas to calculate the population of neutral and ionized
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A five-level cold atomic system for the orbital angular momentum exchange based on a four-wave mixing setup Laser Phys. (IF 1.2) Pub Date : 2023-11-24 E Ali, S M Husein Kamona, T Kh Hussein, H A Abbas, F A Rasen, M S Alhassan, S M Hameed, D N Al-Saidi, A Alawadi, A Alsalamy
In this paper, we suggest a theoretical model for the exchange of the orbital angular momentum (OAM) state of laser fields in a real cold atomic system for realization in an experimental setup. By using four-wave mixing (FWM) processes, we study the spatial dependence of the new weak generated signal light under electromagnetically induced transparency conditions when one of the laser lights becomes
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Multipulse operation in Mamyshev oscillator: influence of external seed source Laser Phys. (IF 1.2) Pub Date : 2023-11-24 Anshuman Nigam, Pradeep K Gupta, C P Singh, Bhuvnesh1, P K Mukhopadhyay, R Arya, S K Dixit
We study the influence of an external seed source on the startup of a fiber Mamyshev oscillator (MO). Depending on the seed source parameters, while keeping MO parameters fixed, we observe diverse mode-locked operations from the MO, generating stable single, double, triple and even up to a group of seven pulses. The probability of the occurrence of such mode-locked operations is studied. There can
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The vortex light induced electric dipole and electric quadru-pole transition in Ca atom Laser Phys. (IF 1.2) Pub Date : 2023-11-23 Zhenzhong Lu, Min Liu, Ce Feng, Jiannan Zhou
The Laguerre–Gaussian beam induced electric transition model is presented. The major mechanism of angular momentum exchange between the light and the atomic system is discussed. The influence of the topological charge on the transition probability and selection rules is obtained. Our results show that the Ca(4s2 1S0–4s3d 1D2) electric quadrupole transition selection rules are sensitive to the sign
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Highly sensitive temperature sensor using nested hollow-core anti-resonant fibers Laser Phys. (IF 1.2) Pub Date : 2023-11-16 Xiao Yue-Yu, Lai Yan-Xiang, Yao Rui-Ming
A highly sensitive temperature sensor based on composite nested negative curvature hollow-core fiber is proposed. Three resonant tubes are nested inside the cladding tubes to induce a resonant coupling between the fundamental core mode and the dielectric mode of the nested resonant tube. Three glass-sheet conjoined nested tubes are introduced to suppress the comparatively low loss higher-order mode
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High sensitivity refractive index sensor based on double peanut-shaped and etched multimode fiber structures Laser Phys. (IF 1.2) Pub Date : 2023-11-13 Huijing Wei, Fang Wang, Xu Wang, Yufang Liu
A fiber optic refractive index (RI) sensor based on an etched multimode fiber (MMF) with a double peanut-shaped structure is proposed and experimentally demonstrated. The sensor consists of two peanut-shaped and a section of etched MMF tapered fiber structure. The excitation of the fundamental mode to higher-order modes is facilitated by using the beam splitting/coupling effect of the double peanut-shaped
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High-efficiency continuous-wave Tm-doped fiber laser with a single fiber Bragg grating at 1942 nm Laser Phys. (IF 1.2) Pub Date : 2023-11-07 Chao Yang, Xin Li, Bowen Zheng, Yongliang Li, Youlun Ju
We report a continuous-wave Tm-doped fiber (TDF) laser with a single fiber Bragg grating (FBG). The Fresnel effect presenting in the passive fiber end-face and high-reflectivity FBG established the resonator. The peak wavelength of the laser was 1942.25 nm with a spectral linewidth of 194 pm. The maximum output power was 37.5 W, corresponding to a slope efficiency of 63.7% with a beam quality factor
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Improving the capacity of quantum dense coding via non-Hermitian operation Laser Phys. (IF 1.2) Pub Date : 2023-11-07 Yang Leng, Fei Chen
We propose a novel method to enhance the capacity of quantum dense coding under amplitude damping noise using non-Hermitian operations. With the assistance of non-Hermitian operations, we show that the capacity of quantum dense coding can always be larger than 1 for any two-qubit states. In particular, the non-Hermitian operation can improve quantum dense coding more efficiently in the case of strong
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Ultrafast nonlinear absorption in MoTe2 and MoTe2/MoS2 nanocomposite films and its application to all-optical logic gates Laser Phys. (IF 1.2) Pub Date : 2023-11-06 Anam Saifi, Sukhdev Roy
We present a detailed theoretical analysis of ultrafast saturable absorption (SA) and reverse SA (RSA) in MoTe2 nano-films with femtosecond (fs) laser pulses at 800 nm. A transition from RSA to SA occurs on increasing the thickness from 30 nm to 80 nm at a constant pump intensity of 141 GW cm−2. On the other hand, a transition from SA to RSA occurs upon increasing the pump intensity in an 80 nm thick
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Design and analysis of a group-III nitride superlattice structure based semiconductor laser diode for blue region emission Laser Phys. (IF 1.2) Pub Date : 2023-11-03 Uppala Sireesha, Nikhil Deep Gupta
The demand for high-power blue laser diodes (LDs) in the range above 2 W has been steadily increasing due to their applications in solid-state lighting, projection displays, high-density optical data storage and underwater communication. However, current designs face limitations in terms of achieving both high power output and efficiency. This work focuses on the design, development and numerical analysis
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Trapped Bose–Einstein condensates with nonlinear coherent modes Laser Phys. (IF 1.2) Pub Date : 2023-10-31 V I Yukalov, E P Yukalova, V S Bagnato
The review presents the methods of generation of nonlinear coherent excitations in strongly nonequilibrium Bose-condensed systems of trapped atoms and their properties. Non-ground-state Bose–Einstein condensates are represented by nonlinear coherent modes. The principal difference of nonlinear coherent modes from linear collective excitations is emphasized. Methods of generating nonlinear modes and
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Q-switched pulse generation by stimulated Brillouin scattering assisted four-wave mixing effect in erbium–bismuth co-doped multi-elements silica glass based optical fiber laser Laser Phys. (IF 1.2) Pub Date : 2023-10-31 A Ghosh, H N A Ali, N Arsad, U K Samanta, S Das, A Dhar, A H A Rosol, M Yasin, S W Harun, M C Paul
We demonstrate Q-switched pulse generation at the 1562.5 nm region by using a 70 cm long erbium–bismuth co-doped alumina–germania–hafnium–yttria silica glass-based fiber as a gain medium in a simple ring resonator configured without saturable absorber and optical isolator devices. The Q-switching was obtained based on a stimulated Brillouin scattering assisted four-wave mixing effect in the gain medium
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A verifiable (t,n) threshold quantum secret sharing scheme based on asymmetric binary polynomial Laser Phys. (IF 1.2) Pub Date : 2023-10-31 Feiting Guan, Jiansheng Guo, Lele Li
Threshold quantum secret sharing is a typical method for quantum secret sharing (QSS) schemes. In this paper, we propose a verifiable t,n threshold QSS scheme based on the d -dimensional Bell state and asymmetric binary polynomial. In this scheme, the dealer encodes the secret using the asymmetric binary polynomial and generates the corresponding secret share for each participant. Then, the dealer
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Two-dimensional tin diselenide as the saturable absorber for passively Q-switched Er:YAP 3 μm solid-state laser Laser Phys. (IF 1.2) Pub Date : 2023-10-31 Xiangzheng Kong, Xiaohui Hu, Chun Qi, Long Du, Maorong Wang, Qiaojun Liu, Shuaiyi Zhang
A passively Q-switched (PQS) Er:YAP laser at ∼3 μm with the two-dimensional saturable absorber (SA) tin diselenide (SnSe2) nanosheet as SA was successfully demonstrated for the first time. Under the maximum absorbed pump power of 4.0 W, the obtained continuous-wave maximum output power of Er:YAP laser was 258 mW with a corresponding slop efficiency of 7.18%. In the PQS experiment, laser pulses with
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Sub-Doppler dichroism as a useful tool in alkali atom hyperfine spectroscopy Laser Phys. (IF 1.2) Pub Date : 2023-10-30 Mohammad Karami, Zahra Heydarinasab, Farrokh Sarreshtedari
Analytical modeling of the sub-Doppler dichroic atomic vapor laser lock error signal shows that the slope of this error signal could be of interest for the identification of transitions in alkali atom hyperfine spectroscopy. Among four D1 line transitions of alkali atoms, the slope sign of the sub-Doppler error signal is different only for the case when the Landé g-factor is negative for both the ground
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Numerical simulation of coherent mid-infrared supercontinuum generation based on carbon chloride core tapered photonic crystal fibers Laser Phys. (IF 1.2) Pub Date : 2023-10-30 Hong-Ping Zhang, Bin Zhao, Rong-Ze Ma, Zhen-Rui Li, Peng-Fei Wang
We numerically studied coherent mid-infrared (MIR) supercontinuum (SC) generated by filling carbon chloride (CCl4, C2Cl4) into the tapered photonic crystal fiber (PCF). The mechanism involves nonlinear soliton compression, Raman soliton self-frequency shift and dispersive wave generated in a carbon chloride core tapered PCF pumped by a 1.98 μm femtosecond laser. Numerical solution of the generalized
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Optomechanically induced grating in a graphene based nanocavity Laser Phys. (IF 1.2) Pub Date : 2023-10-30 B S Abdullaeva, T Alawsi, A Alawadi, A Alsalamy
The optomechanically induced grating (OMIG) in a nanocavity using a bilayer graphene system as the intracavity medium has been proposed. We investigate the effects of different parameters on the Fraunhofer diffraction pattern of the incident probe light. Here, one mirror of the nanocavity is considered coherently driven by the standing wave coupling and probe fields, whereas the second mirror has mechanical
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Modulating dual-wavelength optical fiber vector solitons Laser Phys. (IF 1.2) Pub Date : 2023-10-30 Guangyu Xu, Yangyang Peng, Yongqiang Tang, Keyun Zhang, Meisong Liao, Yongzheng Fang, Yan Zhou
Optical fiber vector solitons have potential applications in the field of high-capacity optical fiber communications and have been widely explored in recent years. Here, we theoretically modulate dual-wavelength optical fiber vector solitons in an optical fiber system at a wavelength regime of 1 μm while considering the influence of group velocity dispersion. When the input dual-wavelength optical
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Optical dipole potential energy of a two-level atom interacting with a tightly focused truncated optical Bessel beam Laser Phys. (IF 1.2) Pub Date : 2023-10-25 M Alquraishi, V E Lembessis, A Lyras, O M Aldossary
Truncated optical Bessel (TOB) beams are an orthonormal set of optical vortex beams that possess orbital angular momentum (OAM). It is characterized by a significant longitudinal electric field component at the sub-wavelength scales. The photons of a circularly polarized TOB beam also carry spin angular momentum (SAM) and can interact with a two-level atom, in the far-off resonance regime, giving rise
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A compact high power diode side-pumped 2.09 μm Tm,Ho:YAG laser Laser Phys. (IF 1.2) Pub Date : 2023-10-19 Jian-Hong Wu, Shi-Feng Du, Hai-Long Wang, Yun Gao, Yong Bo, Da-Fu Cui, Qin-Jun Peng
We demonstrate a high power compact continuous-wave diode side-pumped Tm,Ho:YAG all solid-state laser at room temperature. A high dopant concentration ratio of Tm,Ho:YAG (3 at.% Tm3+, 0.1 at.% Ho3+) crystal rod with laser diode (LD) side-pumped architecture is employed as a laser head. With a single laser head in a plane-parallel short cavity, a maximum 57 W output power is obtained at a temperature
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Analysis of the stability region of light bullets propagating in the tunnel ionization mode in dielectric Laser Phys. (IF 1.2) Pub Date : 2023-10-16 Aleksandr N Bugay, Vyacheslav A Khalyapin
An analytical estimation of the parameters of light bullets formed in the region of anomalous group dispersion in dielectrics under conditions of tunneling photoionization has been carried out. A system of ordinary differential equations for the parameters of a laser pulse is obtained by the method of moments. A new analytical approximation is proposed for calculating the contribution of tunneling
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Red and green dual-wavelength Pr:LiGdF4 laser with a single birefringent filter Laser Phys. (IF 1.2) Pub Date : 2023-10-16 Junwen Bai, Xinhua Fu
A simultaneous continuous-wave (CW) dual-wavelength Pr:LiGdF4 laser using a single birefringent filter (BF) plate under excitation with a frequency doubled optically pumped semiconductor laser (2 ω-OPSL) was experimentally demonstrated. We calculate the wavelength-dependent loss property of the BF. By adjusting the BF plate, the spectral intensity ratio of the generated wavelengths can be maintained
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Self-induced Q-switched fiber laser using tantalum aluminum carbide as a passive modulator Laser Phys. (IF 1.2) Pub Date : 2023-10-16 S A Anuar, M F A Rahman, A M M Nasir, A A Latiff, M F M Rusdi, S W Harun
A self-induced Q-switched erbium-doped fiber laser operating at 1563 nm was achieved by integrating a passive modulator based on tantalum aluminum carbide (Ta2AlC) MAX phase film embedded into polyynyl alcohol. The modulator, serving as a saturable absorber (SA), established a modulation depth of 9% and a saturation intensity of 0.3 MW cm−2. Upon integration of the film SA, a stable Q-switched fiber
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Externally pumped yellow laser source emitting at 577 nm Laser Phys. (IF 1.2) Pub Date : 2023-10-10 Great Chayran, Venkatesan Jambunathan, Martin Smrz, Tomas Mocek
We demonstrated a 577 nm yellow laser source with a proper combination of Raman medium and frequency doubling medium, pumped externally. Cryogenic Yb:YAG oscillator acts as an external pump source, and it generates 1.2 mJ energy at 1 KHz emitting around 1029 nm. Using a Raman resonator with Ba(NO3)2 as Raman medium, stimulated Raman scattering around 1153.4 was generated. Finally, 577 nm yellow laser
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Efficient two-dimensional Fraunhofer diffraction pattern via electron spin coherence Laser Phys. (IF 1.2) Pub Date : 2023-10-06 H Meddour, Sh Askar, S Dehraj, F Al-dolaimy, B S Abdullaeva, A Alsaalamy, M N Fenjan, A Alawadi, S H Kareem, D Thabit
In this letter, we have discussed the two-dimensional diffraction pattern via electron spin coherence in a GaAs quantum dot. Impulsive stimulated Raman excitation utilizing coherent optical fields is employed for the purpose of regulating the electron spin coherence within a charged ensemble of GaAs quantum dots, by means of an intermediate charged exciton (trion) state. We show that for the coupling
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Low-power red laser and blue LED on circadian gene mRNA levels in human breast cancer cells Laser Phys. (IF 1.2) Pub Date : 2023-10-06 Rickson Souza Ribeiro, Juliana Alves Rodrigues, Márcia dos Santos Soares, Andre Luiz Mencalha, Adenilson de Souza da Fonseca
Low-power blue light-emitting diode (LED) and red laser have been used for therapeutic proposals based on photobiomodulation (PBM). This effect is trigged after absorption of radiation by photoacceptors, which lead to molecular, cellular and systemic responses. Cryptochromes are involved in circadian cycle control, and associated with development and progression of tumors. Despite such proteins are
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Crosstalk characteristics of orbital angular momentum of focused perfect vortex beam in atmospheric turbulence Laser Phys. (IF 1.2) Pub Date : 2023-10-06 H Wei, Q Du, C Shi, X Xue, D Cai
The perfect optical vortex beam (POV) is a special kind of vortex beam, whose radius is independent of its orbital angular momentum (OAM) mode, but the atmospheric turbulence (AT) causes crosstalk between different topological charges, which is a serious challenge in OAM-based communication system. We establish a theoretical model with a turbulence suppression effect for deriving the spiral spectrum
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Tuning stability enhancement of all-fiber acousto-optic tunable filter based on multi-piezoelectric transducer Laser Phys. (IF 1.2) Pub Date : 2023-10-06 Feng Qiu, Yongzhong Bai, Dingrong Qu, Guangbin Shan, Lei Han, Yanling Zhang
All-fiber acousto-optic tunable filters (AOTFs) have advantages of wide wavelength tuning range, fast tuning speed and low insertion loss. The resonance wavelength of the all-fiber AOTF can be tuned by adjusting the driving frequency of the piezoelectric transducer (PZT). In general, the driving voltage needs to be tuned in wide range in the wavelength tuning process, due to the existence of resonance
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High-power and efficient vortex Nd:YVO4 laser using annular pumping Laser Phys. (IF 1.2) Pub Date : 2023-10-03 Li Fan, Liming Wang, Ran Sun, Huibo Fan, Jun Zhu
Optical vortex lasers that carry orbital angular momentum are of great significance for many applications. A high-power and efficient continuous-wave vortex Nd:YVO4 laser at 1064 nm was demonstrated with annular pumping based on an axicon. The high-quality LG01 vortex beams with maximum output power up to 6.25 W was achieved under the absorbed pump power of 14.4 W, corresponding to an optical conversion
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Development of a bilayer NiCrAlY/YSZ coating on IN713 LC superalloy by laser cladding Laser Phys. (IF 1.2) Pub Date : 2023-09-28 Ali Khorram, Maysam Nicknia
In this study, bilayer laser cladding of Inconel 713LC superalloy was performed by a Nd:YAG laser. Amdry 997 powder was used as the first layer and Metco 204NS ceramic powder as the second layer. The experiments were carried out with different laser parameters to investigate the influence of heat input and laser power density on the microstructure and the hardness of coating. The study revealed that
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Design of a novel D-shaped SPR sensor with high sensitivity based on PCF for ultra-low refractive index detection Laser Phys. (IF 1.2) Pub Date : 2023-09-25 Biyun Luo, Mengdi An, Tianqi Hu, Hongzhi Jia
In this paper, a novel D-shaped plasmon resonance sensor based on photonic crystal fiber (PCF) is proposed to detect analytical materials with low refractive index. There are three arc-shaped small holes on both upper and lower edges of the fiber core, which can enhance the surface plasmon effect. The operation wavelength of the sensor is from 2243 nm to 2651 nm when its measurable refractive index
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Valuation of theoretical and experimental thresholds fluences of pure metals using laser induced plasma spectroscopy (LIPS) Laser Phys. (IF 1.2) Pub Date : 2023-09-22 Nasar Ahmed, Rinda Hedwig, Marincan Pardede, Koo Hendrik Kurniawan, Abdul Jabbar, Muhammad Aslam Baig
The present studies demonstrate the valuation of threshold fluence of pure metals using the laser-induced plasma spectroscopy technique. The optical emission spectra of the s, p, and d-block elements including Li, Mg, Sr, Ba, Al, Sn, Pb, Cu, Zn, Au, Cd, and Ag were recorded using a Q-switched Nd:YAG laser operating at 532 nm and an Echelle spectrograph (Andor Mechelle M500) equipped with a gated ICCD