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Introduction to the Special Issue on Optical Fiber Sources and Amplifiers Fiber Integr. Opt. (IF 0.644) Pub Date : 2021-01-07 Mário F. S. Ferreira; Mukul Chandra Paul
(2021). Introduction to the Special Issue on Optical Fiber Sources and Amplifiers. Fiber and Integrated Optics. Ahead of Print.
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Modelling and simulation methods for microstructured optical fibers Fiber Integr. Opt. (IF 0.644) Pub Date : 2020-12-10 Sílvia M.G. Rodrigues; Margarida Facão; Mário F. S. Ferreira
ABSTRACT In this paper, we present guidelines for the simulation of microstructured optical fibers (MOFs), for finding their guided modes and their nonlinear and dispersive characteristics. For the case of hollow-core MOFs, we also present guidelines for studying their photonic bands. Then, we review the results of nonlinear pulse propagation on those MOFs, showing how some of them are particularly
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All Polarization-maintaining Passively Mode-locked Ytterbium-doped Fiber Lasers, Behavior under Two Different Cavity Configurations Fiber Integr. Opt. (IF 0.644) Pub Date : 2020-11-22 C. Cuadrado-Laborde; A. Carrascosa; A. Díez; J.L. Cruz; M.V. Andrés
ABSTRACT In this work, we review our recent investigations on the behavior of a polarization-maintaining passively mode-locked ytterbium-doped laser in two different cavity configurations, namely: fiber-ring (FR) and Fabry-Perot (FP). Opposed to standard configurations that rely on the use of strong filtering within the cavity by including an ad hoc component with this purpose, here the filtering action
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Controlling the Soliton Explosions in Fiber Lasers with Parameter Management Fiber Integr. Opt. (IF 0.644) Pub Date : 2020-11-08 Sofia C. V. Latas; Mário F. S. Ferreira
ABSTRACT We investigate different ways of controlling the soliton explosions in passively mode-locked fiber lasers through management of the system parameters. Assuming a set of reference values for these parameters, we find that the number of soliton explosions increases with the magnitude of fiber anomalous dispersion. The soliton explosions are suppressed and the stationary pulse width is reduced
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Microwave Photonic Mixer Using DP-DDMZM for Next Generation 5G Cellular Systems Fiber Integr. Opt. (IF 0.644) Pub Date : 2020-09-30 Amitesh Kumar; Abhinav Gautam; Vishnu Priye
ABSTRACT Microwave frequency down-conversion at 4.5 GHz using proposed photonic mixer is analyzed on various aspects in this manuscript. The proposed microwave photonic down-converter employs a Dual-Parallel Dual-Drive Mach–Zehnder Modulator (DP–DDMZM) that makes the system more compact than previously reported photonic mixers. Suppressed carrier modulation technique is used to increase the sideband
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High-dimensional quantum key distribution with statistical and intensity fluctuations Fiber Integr. Opt. (IF 0.644) Pub Date : 2020-09-24 Yang Wang; Ya-Hui Gan
ABSTRACT High-dimensional quantum key distribution (HD-QKD) can higher the secret-key capacity and tolerate more errors. Several HD-QKD experiments have been demonstrated over deployed fibers to show promising future toward high-dimensional quantum communication networks. However, the practical security of HD-QKD systems should be widely considered before large-scale application of HD-QKD systems.
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Spectroscopic Properties of Holmium-Aluminum-Germanium Co-doped Silica Fiber Fiber Integr. Opt. (IF 0.644) Pub Date : 2020-10-18 Yuri O. Barmenkov; Alexander V. Kir’yanov; Miguel V. Andrés
ABSTRACT We report the basic spectroscopic properties of a home-made holmium-aluminum-germanium co-doped silica fiber, designed for laser applications. We present the ground-state and excited-state absorption spectra of the fiber along with the up-conversion emission spectrum under laser action, which served for making an energy levels’ diagram of Ho3+ ion. We discuss the ways to assess the kinetics
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A Continuously Tunable Booster Optical Amplifier-Based Fiber Ring Laser Covering L and Extended L Bands Fiber Integr. Opt. (IF 0.644) Pub Date : 2020-10-05 Khurram Karim Qureshi
ABSTRACT We propose and demonstrate a simple design of semiconductor fiber ring laser covering a broad tunable range, comprising L and extended L bands. The proposed laser can be continuously tuned over 54 nm from 1578 to 1632 nm with a total output power of around 5.2 dBm and having a side mode suppression ratio (SMSR) of around 55 dB by incorporating a Fabry Pérot tunable filter. The generated output
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Performance Analysis on Single- and Double-Pass Ytterbium-Doped Fiber Amplifier in the 1 µm Region Fiber Integr. Opt. (IF 0.644) Pub Date : 2020-10-13 Dunya Zeki Mohammed; A. H. Al-Janabi
ABSTRACT In this work, single- and double-pass configurations of ytterbium-doped optical fiber amplifiers (YDFAs) have been investigated. This low quantum defect rare-earth dopant and their performance near 1 µm region has been comprehensively investigated on the basis of gain and noise figure in relation with input signal power and input pump power. The obtained results showed that at an input pump
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Design of Photonic Crystal Fiber Refractive Index Sensor Based on Surface Plasmon Resonance Effect for the Dual-Wavebands Measurement Fiber Integr. Opt. (IF 0.644) Pub Date : 2020-10-04 Chaobin Ren; Jinhui Yuan; Kuiru Wang; Binbin Yan; Xinzhu Sang; Chongxiu Yu
ABSTRACT In this paper, we propose a photonic crystal fiber (PCF) refractive index (RI) sensor based on the surface plasmon resonance (SPR) effect. The coupling and sensing characteristics of the proposed PCF-SPR RI sensor are investigated by the finite element method. The proposed PCF-SPR RI sensor can achieve the dual-wavebands measurement. By controlling the analytes height and incident light wavelength
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Dynamics of Compressed Optical Pulse in Cubic-quintic Media Fiber Integr. Opt. (IF 0.644) Pub Date : 2020-08-13 Sudipta Das; Golam Ali Sekh
We consider optical pulse propagation in cubic-quintic nonlinear media and analyze the dynamics of pulse compression within the framework of variational approach. Based on a potential model we find effective pulse width for stable propagation. We see that a pulse propagating in cubic media gets compressed due to quintic nonlinearity. The value of width of a compressed pulse decreases with the increase
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Sc2O3 PVA Film for Switching and Mode-Locking Application in Erbium-Doped Fiber Laser Cavity Fiber Integr. Opt. (IF 0.644) Pub Date : 2020-08-13 N. F Zulkipli; F. S. M. Samsamnun; a. H. a Rosol; a. Altuncu; M. F. M. Rusdi; M. B. H. Mahyuddin; M. I. M. A. Khudus; E. Hanafi; S. W. Harun
We generated Q-switched and mode-locked pulses by making use of the saturable absorption characteristic of scandium oxide (Sc2O3) film, which was obtained by embedding Sc2O3 nanopowders into polyvinyl alcohol film. The Q-switched laser operated at center wavelength of 1560.5 nm with the maximum pulse energy of 65.6 nJ and 4.4% slope efficiency. With the addition of a 200 m extra single-mode fiber in
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Nickel Nanoparticles Saturable Absorber for Multiwavelength Pulses Generation in Ytterbium-Doped Fiber Laser Fiber Integr. Opt. (IF 0.644) Pub Date : 2020-05-29 Ansam M. Salman; Abdulhadi Al-Janabi
We report on the generation of multiwavelength Q-switched pulses from a Ytterbium-doped fiber laser (YDFL) cavity by employing a nickel nanoparticle (Ni-NPs) thin film as an optical modulator. Owing to the high nonlinearity of Ni-NPs and the distinguished saturable absorption property, stable single-, dual-, triple-, or quadruple-line, Q-switched generation with a 0.7 nm channel spacing have been achieved
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Nickel Nanoparticles Saturable Absorber for Multiwavelength Pulses Generation in Ytterbium-Doped Fiber Laser Fiber Integr. Opt. (IF 0.644) Pub Date : 2020-05-29 Ansam M. Salman; Abdulhadi Al-Janabi
We report on the generation of multiwavelength Q-switched pulses from a Ytterbium-doped fiber laser (YDFL) cavity by employing a nickel nanoparticle (Ni-NPs) thin film as an optical modulator. Owing to the high nonlinearity of Ni-NPs and the distinguished saturable absorption property, stable single-, dual-, triple-, or quadruple-line, Q-switched generation with a 0.7 nm channel spacing have been achieved
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Multitasking and Cascadable Microwave Photonic Signal Processing Topologies with Silicon Photonic Technologies Fiber Integr. Opt. (IF 0.644) Pub Date : 2020-04-30 Shijie Song; Suen Xin Chew; Liwei Li; Xiaoke Yi; Linh Nguyen; Robert Minasian
Microwave photonics (MWPs) is an emerging interdisciplinary field, where photonics technologies are adopted to facilitate the generation, transmission, detection, and processing of signals at radio-wave, microwave, and millimeter-wave frequencies. Recently, the integrated photonic technology has demonstrated its capability to miniaturize photonic circuits on a single chip, which paves the way for next-generation
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Deployment of Fiber-Based Access in the Kosovan Telecommunications Market Fiber Integr. Opt. (IF 0.644) Pub Date : 2020-04-23 Jakup Ratkoceri; Bostjan Batagelj
The existing fiber-based optical access technologies in the Republic of Kosovo are reviewed in this article. A historical background to the wireline technologies is provided with the focus on fiber-based technologies. This is combined with a description of the current deployments and the future prospects for fiber-based optical access technologies. In addition, the market share in the Kosovan telecommunications
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Optical Fiber Sources and Amplifiers Fiber Integr. Opt. (IF 0.644) Pub Date : 2020-03-19 Mário F. S. Ferreira; Mukul Chandra Paul
(2020). Optical Fiber Sources and Amplifiers. Fiber and Integrated Optics. Ahead of Print.
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Microwave Photonic Up- and Down-Converter with Tunable Phase Shift Based on an Integrated Dual-Polarization Dual-Parallel Mach–Zehnder Modulator without Optically Filtering Fiber Integr. Opt. (IF 0.644) Pub Date : 2020-03-02 Dou Chen; Jianxin Ma
In this paper, we propose and numerically simulate a microwave photonic phase-tunable frequency converter (MPPTFC) without optically filtering to realize both frequency up- and down-conversion and a full 360° phase-shift for the microwave signal based on an integrated dual-polarization dual-parallel Mach–Zehnder modulator (DP-DPMZM). In the proposed scheme, both microwave RF signal and frequency-tunable
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Correction Fiber Integr. Opt. (IF 0.644) Pub Date : 2020-02-20
(2020). Correction. Fiber and Integrated Optics. Ahead of Print.
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Quantum Communications Fiber Integr. Opt. (IF 0.644) Pub Date : 2020-01-26 Mário F. S. Ferreira; Armando N. Pinto; Hannes Hübel
(2020). Quantum Communications. Fiber and Integrated Optics. Ahead of Print.
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Sensors of Encoding and Decoding Based on Superstructure Fiber Bragg Gratings Modulated in Amplitude and Phase for applications in systems OCDMA - 63 chip Fiber Integr. Opt. (IF 0.644) Pub Date : 2019-12-23 Antonio Francisco Gomes Furtado Filho, Juscelino Sales Chaves, José Rubens Rodrigues de Sousa, Giannini Italino Alves Vieira, Marcio de Melo Freire, Antonio Sergio Bezerra Sombra
In this paper, we report a series of incremental optical coding and decoding sensors using their respective fiber Bragg grating superstructure (SS-FBG). We performed a comparative study of the encoding/decoding bipolar and unipolar sequences using these grids. The modulation in the refractive index can be changed by discrete jumps in phase (± π) or variations in the amplitude of the specific grid regions
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Optical 8PSK Generation by Cascading Squared and Rectangular QPSK Using Microring Modulators Fiber Integr. Opt. (IF 0.644) Pub Date : 2019-12-23 Sanjukta Bhowmik, Satyabrata Singha, Bishanka Brata Bhowmik
We have proposed and successfully simulated a general design concept of an 8PSK generator using a silicon microring modulator. Usually, quadrature phase-shift keying (QPSK) is generated using in-phase/quadrature modulator in balanced condition or in un-balanced condition showing a square-shape and rectangular-shape constellation mapping in complex plane, respectively. By introducing 8 dB loss in the
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Comparison of Self-Injection Locking of DFB-LD by Optical Fiber and Optical Waveguide Ring Resonators Fiber Integr. Opt. (IF 0.644) Pub Date : 2019-12-22 Cong Wang, Rong Zhang, Zhenming Zhao, Chen Chen, Mei Kong
Utilizing the frequency selection characteristic of ring resonators, self-injection-locking linewidth narrowing and frequency stabilization of distributed feedback laser diodes (DFB-LDs) can be achieved under the aid of ring resonators. In this paper, the self-injection-locking effects of a DFB-LD realized by two fiber ring resonators and an optical waveguide ring resonator are compared. The influences
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Integrated Photonic Filters in Support of Converged 5G Mobile Fronthaul & Midhaul Transport Layers Fiber Integr. Opt. (IF 0.644) Pub Date : 2019-12-04 Giannis Giannoulis, Konstantinos Tokas, Giannis Poulopoulos, Giannis Kanakis, Panagiotis Toumasis, Konstantina Kanta, Dimitrios Apostolopoulos, Hercules Avramopoulos
A Wavelength Division Multiplexing (WDM)-enabled analog mobile fronthaul architecture is presented supporting enhanced flexibility by exploiting the fine filtering properties of a fully reconfigurable, silicon photonics-based filtering element. Numerical studies are presented emphasizing on the flexibility, low-energy consumption, and the compatibility of our proposed chip-scale implementations with
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Beyond 400 Gbps: Reaching for Higher Data Rates and Connectivity Fiber Integr. Opt. (IF 0.644) Pub Date : 2019-11-18 Henri Hodara, Edvin Skaljo
In this paper, we discuss in details information and communication developments (1) that have arisen in support of a rapidly expanding internet (Internet of Things, IoT) coupled with a proliferation of data centers; (2) the ensuing data rates explosion capable of reaching 800 Gb/s with coherent technology over a single wavelength; as well as (3) an increased connectivity through 5G transport networks
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Simplified Approach for Optimizing Optical Asymmetric Curved Waveguides of Broadband Directional Couplers Fiber Integr. Opt. (IF 0.644) Pub Date : 2019-09-16 Lemi Bedjisa Dano, San-Liang Lee, Wen-Hsien Fang
Optical broadband directional couplers (BDCs) are indispensable components for providing wavelength-insensitive and flexible optical splitting in the construction of functional photonic integrated circuits (PICs). The existing BDC device structures are usually required to determine specific design parameters for different waveguide structures and operating wavelength bands. To circumvent this dilemma
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Data Centers and beyond, Optical Fiber Communications Breakthroughs from OFC 2019 Fiber Integr. Opt. (IF 0.644) Pub Date : 2019-08-19 H. Hodara, G. Mitchell
Fiber-optic communication breakthroughs are presented every year at the Optical Communication Conference, OFC. This paper reviews some of the key papers presented at the OFC 2019, held March 3 through 7 in San Diego, CA. Some of the conference themes were: Data Center Connectivity, 5G Networks, and major advances in components and in communication systems. The Conference stressed the work carried out
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Design of Two 8-Channel Optical Demultiplexers Using 2D Photonic Crystal Homogeneous Ring Resonators Fiber Integr. Opt. (IF 0.644) Pub Date : 2019-08-08 Vahid Fallahi, Masoud Mohammadi, Mahmood Seifouri
Ring resonators have always been referred to as a highly flexible structure for designing optical devices. In this paper, we have designed and evaluated two 8-channel optical demultiplexers using photonic crystal ring resonators. The purpose of this study is to investigate the flexibility of this type of resonator for designing and manufacturing optical devices based on photonic crystals. To the extent
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Experimental Verification on a Slicing Management Based on the mPlane Monitoring Plane with GPON Comparison Fiber Integr. Opt. (IF 0.644) Pub Date : 2019-07-11 E. Tego, F. Matera, V. Attanasio, E. Nastri
We experimentally verify a slicing approach, operating in a PBB-TE core and PON access architecture, based on the mPlane measurement plane, also adopted to manage slicing instances. The key element of this paper is the proposal and the implementation of the Slicing End Point (SEP), that is the client element to set up the slice path, and, at the same time, it allows us to monitor the network performance
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Design and Simulation of Broadband Beam Splitter on a Silicon Nitride Platform for Optical Coherence Tomography Fiber Integr. Opt. (IF 0.644) Pub Date : 2019-07-10 Bhawna Sharma, Kamal Kishor, Sandeep Sharma, Roshan Makkar
Integrated photonics enables the miniaturization of bulk optical components for biosensing applications such as optical coherence tomography (OCT) and is therefore promising for future lab-on-chip solutions. Here, we report the design and simulation of a compact low loss broadband beam splitter with arbitrary coupling ratios on silicon nitride platform for OCT systems. The reported coupler uses asymmetric
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Single-Longitude-Mode Fiber Laser Implementation by Using Only Two Subring Cavities in Serial/Parallel Connection Fiber Integr. Opt. (IF 0.644) Pub Date : 2019-07-09 Hsin-Che Lee, Yin-Wen Lee, Jiun-Shin Chang, Shien-Kuei Liaw
By incorporating double-ring cavities and a piece of un-pumped Er3+-doped fiber (EDF) as a saturable absorber, we report a single-longitude-mode EDF fiber laser at C-band. The single-longitude-mode is obtained, the first time, by inserting only two subring cavities in either serial connection or parallel connection. The fiber laser has an optical signal-to-noise-ratio of 34.5 dB and a maximum power
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Microwave Photonic Phase Shifter Based on an Integrated Dual-polarization Dual-parallel Mach-Zehnder Modulator without Optical Filter Fiber Integr. Opt. (IF 0.644) Pub Date : 2019-06-03 Zhentao Guo, Jianxin Ma, Shanguo Huang, Xinlu Gao
A frequency-doubled microwave photonic phase shifter (MPPS) without optical filter is proposed. The MPPS is based on an integrated dual-polarization dual-parallel Mach-Zehnder modulator (DP-DPMZM) and a polarization modulator (PolM). The DP-DPMZM with a 90° polarization rotator in one arm is used to generate an optical carrier suppressed double sideband (OCS-DSB) signal with orthogonal polarization
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Design of Hamming Code Checker Using Titanium-Diffused Lithium Niobate-Based Waveguide Fiber Integr. Opt. (IF 0.644) Pub Date : 2019-05-31 Vivek Kumar Srivastava, Amrindra Pal, Sandeep Sharma
This work presents an electro-optic effect-based design for the widely used Hamming code for checking single bit errors in the received data. The structure is based on Mach-Zehnder Interferometer, designed using Titanium-diffused Lithium Niobate-based waveguides. The proposed device has been successfully tested using the beam propagation method. For a received 7-bit code, the three simultaneously generated
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Fabrication and Gamma-Ray Irradiation Effect on Optical and Mechanical Properties of Germano-Silicate Glass Fibers with Inner Cladding of B and F Doped Silica Glasses Fiber Integr. Opt. (IF 0.644) Pub Date : 2019-04-18 S. Ju, P. R. Watekar, Y.-T. Ryu, Y. Lee, S. G. Kang, Y. Kim, K. Linganna, Y. H. Kim, W.-T. Han
The effect of glass composition, pure silica glass, boron-doped and fluorine-doped silica glasses of inner cladding, in the germano-silicate glass core fibers on optical and mechanical properties upon the γ-ray irradiation was investigated. Enhanced radiation hardening at 1,550 nm was found in both the B- and F-doped fibers after the γ-ray irradiation with dose-rate of 1.25 kGy/h. The radiation-induced
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Design of a Novel Mid-Infrared Single-Polarization Single-Mode Photonic Crystal Fiber with Low Loss, High Nonlinearity, and Large Bandwidth Fiber Integr. Opt. (IF 0.644) Pub Date : 2019-03-26 Zhanqiang Hui, Dongyang Hou, Youkun Zhang, Shixiu Wei, Junhua Xu
A novel mid-infrared Ge20Sb15Se65 chalcogenide-based single-polarization single-mode (SPSM) photonic crystal fiber (PCF) with rectangular latticed circular air holes is proposed. The properties of SPSM bandwidth, confinement loss, and nonlinearity are analyzed in the 3 μm~8 μm mid-infrared region using the finite -difference time-domain (FDTD) method. The influences of different geometrical parameters
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Realization of Quantum SWAP Gate Using Photonic Integrated Passive and Electro-optically Active Components Fiber Integr. Opt. (IF 0.644) Pub Date : 2019-03-01 Shahram MohammadNejad, Anahita KhodadadKashi
We report on the theoretical design and simulation of a photonic quantum circuit that operates as a single-photon, two-qubit swap gate. In this approach, the circuit is implemented in Titanium indiffused LiNbO3 channel waveguides, and polarization and spatial encoding are utilized to realize the qubits. A set of basic components comprising a dual periodically poled waveguide for two simultaneous Type-0
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Improving Locking Accuracy of Resonant Optical Gyroscope by Laser and Acoustooptic Frequency Shifter Jointed Pound-Drever-Hall Technique Fiber Integr. Opt. (IF 0.644) Pub Date : 2019-02-20 Rong Zhang, Cong Wang, Heng Wang, Xiuli Li, Jiaxuan Li, Mei Kong
A laser and acoustooptic frequency shifter jointed Pound-Drever-Hall technique is designed to lock the resonant optical gyroscope. Utilizing direct digital synthesizer (DDS) technology and temperature control in the driver, the frequency-shift precision of the acoustooptic frequency shifter higher than 1 Hz is obtained. Experiments show that compared with locking by tuning the laser only, the zero-bias
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Q-Switched Thulium-Doped Fiber Laser with Pure Titanium-Film-Based Saturable Absorber Fiber Integr. Opt. (IF 0.644) Pub Date : 2019-02-11 A.R. Muhammad, R. Zakaria, M. T. Ahmad, H. R. A. Rahim, H. Arof, S.W. Harun
We demonstrate the generation of Q-switching pulse train in thulium-doped fiber laser (TDFL) cavity by employing titanium-based saturable absorber (Ti-SA). The Ti-SA was fabricated by depositing titanium particles molecules using electron beam evaporation on the surface of a polyvinyl alcohol (PVA) film. Subsequently, stable Q-switched pulses were obtained within the 1,552 nm pump power range from
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An Inverter-Based, CMOS, Low-Power Optical Receiver Front-End Fiber Integr. Opt. (IF 0.644) Pub Date : 2019-01-22 Soorena Zohoori, Mehdi Dolatshahi, Majid Pourahmadi, Mahmoud Hajisafari
In this paper, a low-power optical receiver front-end which consists of a transimpedance amplifier (TIA) and three stages of limiting amplifier (LA) for 2.5 Gb/s applications is proposed in 0.18 µm CMOS technology. The proposed TIA benefits from a modified inverter structure, in which the input resistance is properly reduced due to the use of diode-connected transistors in comparison with conventional
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Design Investigation of 2 × 2 Mach–Zehnder Optical Switch Based on a Metal–Polymer–Silicon Hybrid Plasmonic Waveguide Fiber Integr. Opt. (IF 0.644) Pub Date : 2018-11-14 Maithem S. Jaber, Shelan K. Tawfeeq, Raad S. Fyath
In this paper, a miniaturized 2 × 2 electro-optic plasmonic Mach–Zehnder switch (MZS) based on metal–polymer–silicon hybrid waveguide is presented. Adiabatic tapers are designed to couple the light between the plasmonic phase shifter, implemented in each of the MZS arms, and the 3-dB input/output directional couplers. For 6 µm-long hybrid plasmonic waveguide supported by JRD1 polymer ( r33= 390 pm/V)
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SDOWN: A Novel Algorithm and Comparative Performance Analysis of Underlying Infrastructure in Software Defined Heterogeneous Network Fiber Integr. Opt. (IF 0.644) Pub Date : 2018-10-10 Sanjeev Singh, Rakesh Kumar Jha
In this article, a comparative performance analysis of three (03) different algorithms operating in the control plane of the three (03) varied architectures such as Physically Distributed, Logically Distributed, and Physically Centralized Architecture has been done. The paper also elucidates the working and implementation of the three proposed architectures with suitable block diagram of system model
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Physical Layer Framework for the Multi-Gigabit Copper-Fiber Access Networks Fiber Integr. Opt. (IF 0.644) Pub Date : 2018-10-05 Rainer Strobel
In future, Internet access speeds beyond 1 Gbit/s will be required, which is mainly provided by fiber connections in the fixed access network. A high-performance copper-based transmission technology can enable fiber to the building and fiber to the home installations in a cost-effective copper/fiber hybrid network. ITU has started a project for multi-gigabit copper access (MGfast), as a successor of
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End of Volume Fiber Integr. Opt. (IF 0.644) Pub Date : 2018-10-05
(2018). End of Volume. Fiber and Integrated Optics: Vol. 37, No. 6, pp. 347-347.
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Theoretical Study on Passively Mode-Locked Fiber Lasers with Saturable Absorber Fiber Integr. Opt. (IF 0.644) Pub Date : 2018-10-05 Ahmed Nady, F. H. Mathkoor, Sulaiman Wadi Harun
In this paper, passively mode-locked erbium-doped fiber lasers based on saturable absorber (SA) have been theoretically studied. The energetics and pulse properties for different fiber laser cavity configurations have been investigated and the effects of each component (active fiber, passive fiber, and SA) in the laser cavity have been studied. This numerical study takes into account the temporal change
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Simulation of Third-Order Intermodulation Distortion Suppression Incorporating Dual-Parallel Mach–Zehnder Modulator in a CR-SSB Modulation Fiber Integr. Opt. (IF 0.644) Pub Date : 2018-09-19 Wen Liu, Jianxin Ma, Junyi Zhang, Qi Zhang, Xiaoli Yin, Xiangjun Xin, Shanguo Huang
A novel scheme is proposed to enlarge the spurious free dynamic range (SFDR) of microwave photonic (MWP) link by using dual-parallel Mach–Zehnder modulator, which modifies the single sideband signal and replaces the optical carrier with an unmodulated one to remove the optical main sources of third-order intermodulation distortion (IMD3). Simulation results show that the IMD3 and fifth-order intermodulation
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Linearized Electro-Optical Modulation for Analog Radio over Fiber Fiber Integr. Opt. (IF 0.644) Pub Date : 2018-08-29 Luis Ernesto Ynoquio Herrera, Renata Goldman Leibel, Gustavo Castro do Amaral, Patryk Jay Urban, Jean Pierre von der Weid
Intermodulation distortion (IMD) in Analog Radio-over-Fiber (a-RoF) poses a severe limitation to achievable error-free transmission. In this work, an optical feed-forward linearization scheme is presented and compared to an electrical pre-distortion solution. Both techniques show identical performance for intermodulation compensation of neighboring frequencies. The former suits wideband multi-carrier
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Role of a Measurement Plane to Monitor and Manage QOS in Optical Access Networks Fiber Integr. Opt. (IF 0.644) Pub Date : 2018-07-11 Edion Tego, Francesco Matera, Luca Rea, Emanuele Nastri, Vincenzo Attanasio
In this work, we propose a measurement plane for Software Defined Networking (SDN) architectures for monitoring the network performance and supporting the orchestrator in managing the optical link resources. Concerning the measurement plane, we consider two models that we adopted in other contests: Misurainternet and mPlane. However, due to better scalability, the tests reported in this paper refer
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Dual-Output Mach–Zehnder Modulator for Optical Access Networks Fiber Integr. Opt. (IF 0.644) Pub Date : 2018-06-19 Yibeltal Chanie Manie, Run-Kai Shiu, Peng-Chun Peng, Po-Tso Shen, Mekuanint Agegnehu Bitew, Bao-Yi Guo
This paper employs dual-output Mach–Zehnder Modulator (MZM) for optical access networks without optical filters. Light waves generated from multiple laser sources are multiplexed and fed into dual-output MZM. Biasing the dual-output MZM at null point generates central carriers in one output port and first-order sidebands in another output port. Reflective semiconductor optical amplifier modulates both
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Enhancement of Optical Fiber Coupling Based on Collimated and Focused Laser Diode Beam with Micro Aspherical Plano-Convex Lens Fabricated by Excimer Laser Fiber Integr. Opt. (IF 0.644) Pub Date : 2018-06-01 Muttahid Ull Hoque
In this article, we have proposed and demonstrated experimentally the double plano-convex micro-aspherical lens scheme to amplify an edge-emitting laser diode (LD) to optical fiber coupler. Both microlenses have two different profiles along their x- and the y-axes direction. The optical simulation software Zemax is used to design and optimize the proposed microlens profile and then fabricate by an
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Twin-Ring Optical WDM-MAN Enabling Triple-Hierarchical Reconfigurations and Quadruple-Shared Protections Fiber Integr. Opt. (IF 0.644) Pub Date : 2018-05-30 Jian Chen, Kaiyu Gou, Chaoqin Gan, Chang Lv, Yuchao Zhang
An optical wavelength division multiplexing metro access network is proposed in this paper. With the design of flexible distribution node (FDN), three kinds of reconfigurable networks can be flexibly built to achieve intra- and inter-optical network unit (ONU)-direct communications. With the adoption of multiple tangent twin-ring topologies, four-level shared protections covering both feeder and distribution
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Analysis of Optical Erasure Efficiency in WDM-PONs Employing Carrier Remodulation Fiber Integr. Opt. (IF 0.644) Pub Date : 2018-05-08 Camilla de Santana Batalha, Ulysses Rondina Duarte, Maria Aparecida Gonçalves Martinez, Murilo A. Romero
This paper proposes a method to monitor the operation performance of reflective semiconductor optical amplifier (RSOA)-based optical network units (ONUs) in wavelength-reuse wavelength-division-multiplexing passive optical network topologies. For this goal, the optical erasure efficiency of ONU RSOA is numerically evaluated through remote measurements at the optical line terminal site, using the VPI
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Large-Scale Location-Aware Services in Access: Hierarchical Building/Floor Classification and Location Estimation Using Wi-Fi Fingerprinting Based on Deep Neural Networks Fiber Integr. Opt. (IF 0.644) Pub Date : 2018-04-27 Kyeong Soo Kim, Ruihao Wang, Zhenghang Zhong, Zikun Tan, Haowei Song, Jaehoon Cha, Sanghyuk Lee
We report the results of our investigation on the use of deep neural networks (DNNs) for building/floor classification and floor-level location estimation based on Wi-Fi fingerprinting. We propose a new DNN architecture based on a stacked autoencoder for feature space dimension reduction and a feed-forward classifier for multi-label classification with arg max functions to convert multi-label classification
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Analysis of physical layer performance of data center with optical wavelength switches based on advanced modulation formats Fiber Integr. Opt. (IF 0.644) Pub Date : 2018-04-20 Iftikhar Ahmad, Mohsan Niaz Chughtai
In this paper the IRIS (Integrated Router Interconnected spectrally), an optical domain architecture for datacenter network is analyzed. The IRIS integrated with advanced modulation formats (M-QAM) and coherent optical receiver is analyzed. The channel impairments are compensated using the DSP algorithms following the coherent receiver. The proposed scheme allows N2 multiplexed wavelengths for N×N
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1.25–2.5 Gb/s Simple Nyquist Transmitters for Coherent UDWDM-PON with Enhanced Spectral Efficiency Fiber Integr. Opt. (IF 0.644) Pub Date : 2018-04-19 J. Camilo Velásquez, Jeison Tabares, Iván N. Cano, Josep Prat
We present a coherent ultra-dense wavelength division multiplexing passive optical network (UDWDM-PON) with enhanced spectral efficiency. The benefit of using Gaussian or Nyquist pulse-shaping filters at the transmitter is evaluated through numerical simulations and experiments. The transmitters consist of directly phase modulated distributed feedback (DFB) lasers through beat signals whose duty-cycle
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Analysis of Online DBA Algorithm with Adaptive Sleep Cycle in WDM EPON Fiber Integr. Opt. (IF 0.644) Pub Date : 2018-04-06 Bojan Pajčin, Petar Matavulj, Mirjana Radivojević
In order to manage Quality of Service (QoS) and energy efficiency in the optical access network, an online Dynamic Bandwidth Allocation (DBA) algorithm with adaptive sleep cycle is presented. This DBA algorithm has the ability to allocate an additional bandwidth to the end user within a single sleep cycle whose duration changes depending on the current buffers occupancy. The purpose of this DBA algorithm
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Smart Phase Tuning in Microwave Photonic Integrated Circuits Toward Automated Frequency Multiplication by Design Fiber Integr. Opt. (IF 0.644) Pub Date : 2018-04-06 N. Nabavi
The author investigates the monitoring methods for fine adjustment of the previously proposed on-chip architecture for frequency multiplication and translation of harmonics by design. Digital signal processing (DSP) algorithms are utilized to create an optimized microwave photonic integrated circuit functionality toward automated frequency multiplication. The implemented DSP algorithms are formed on
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Spectral amplitude code label switching system for IM, DQPSK and PDM-DQPSK with frequency swept coherent detection Fiber Integr. Opt. (IF 0.644) Pub Date : 2018-03-27 Aboagye Adjaye Isaac, Cao Yongsheng, Chen Fushen
We present and compare the outcome of implicit and explicit labels using intensity modulation (IM), differential quadrature phase shift keying (DQPSK), and polarization division multiplexed (PDM-DQPSK). A payload bit rate of 1, 2, and 5 Gb/s is considered for IM implicit labels, while payloads of 40, 80, and 112 Gb/s are considered in DQPSK and PDM-DQPSK explicit labels by stimulating a 4-code 156-Mb/s
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Next Generation Access Network Deployment in Croatia: Optical Access Networks and Current IoT/5G Status Fiber Integr. Opt. (IF 0.644) Pub Date : 2018-03-20 Damir Breskovic, Mladen Sikirica, Dinko Begusic
This paper gives an overview and background of optical access network deployment in Croatia. Optical access network development in Croatia has been put into a global as well as in the European Union context. All the challenges and the driving factors for optical access networks deployment are considered. Optical access network architectures that have been deployed by most of the investors in Croatian
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Design of Multi-core Fiber Patch Panel for Space Division Multiplexing Implementations Fiber Integr. Opt. (IF 0.644) Pub Date : 2018-03-16 Luz E. González, Alvaro Morales, Simon Rommel, Bo F. Jørgensen, N. Porras-Montenegro, Idelfonso Tafur Monroy
A multi-core fiber (MCF) patch panel was designed, allowing easy coupling of individual signals to and from a 7-core MCF. The device was characterized, measuring insertion loss and cross talk, finding highest insertion loss and lowest crosstalk at 1300 nm with values of 9.7 dB and -36.5 dB respectively, while at 1600 nm insertion loss drops to 4.8 dB and crosstalk increases to -24.1 dB. Two MCF splices
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Surface Modified Long Period Fiber Grating Sensor for Rapid Detection of Aspergillus Niger Fungal Spores Fiber Integr. Opt. (IF 0.644) Pub Date : 2018-03-16 Monika Gambhir, Shilpi Gupta, Priya John, Ramakanta Mahakud, Jitendra Kumar, Om Prakash
We present development of a compact and label-free sensor based on the surface modification of copper vapor laser fabricated long period fiber gratings for detection of airborne Aspergillus niger (A. niger) fungal spores. Surface of sensors were functionalized with monoclonal glucose oxidases IgG1 for target-specific covalent binding. In process of functionalization and binding of 103 cfu/ml of pathogenic
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