Results 11 to 20 of about 108,935 (277)

Single-Frequency Ring Fiber Laser with Random Distributed Feedback Provided by Artificial Rayleigh Scattering [PDF]

Photonics
Femtosecond (fs) laser inscription technology allows for the production of in-fiber disordered structures with an enhanced level of Rayleigh backscattering with relatively few induced losses. These properties enable the application of these structures as
Mikhail I. Skvortsov, Kseniya V. Proskurina, Evgeniy V. Golikov, Alexander V. Dostovalov, Alexey A. Wolf, Zhibzema E. Munkueva, Sofia R. Abdullina, Vadim S. Terentyev, Olga N. Egorova, Sergey L. Semjonov, Sergey A. Babin   +10 more
doaj   +4 more sources

Tunable Erbium-Doped Fiber Laser Based on Random Distributed Feedback [PDF]

IEEE Photonics Journal, 2014
A tunable erbium-doped fiber (EDF) laser based on random distributed feedback through backward Rayleigh scattering in a 20-km-long single-mode fiber and a tunable fiber Fabry-Perot interferometer filter is demonstrated.
Lulu Wang, Xinyong Dong, Perry Ping Shum, Haibin Su   +3 more
doaj   +2 more sources

Detached Error Feedback for Distributed SGD with Random Sparsification [PDF]

, 2020
The communication bottleneck has been a critical problem in large-scale distributed deep learning. In this work, we study distributed SGD with random block-wise sparsification as the gradient compressor, which is ring-allreduce compatible and highly computation-efficient but leads to inferior performance.
An Xu, Heng Huang 0001
openaire   +4 more sources

Lyot-filter-based multiwavelength random distributed feedback fiber laser [PDF]

SPIE Proceedings, 2014
Multiwavelength lasing in the random distributed feedback fiber laser is demonstrated by employing an all fiber Lyot filter. Stable multiwavelength generation is obtained, with each line exhibiting sub-nanometer line-widths. A flat power distribution over multiple lines is also obtained, which indicates the contribution of nonlinear wave mixing towards
Srikanth Sugavanam, Zhijun Yan, Vladimir Kamynin, Andrew S. Kurkov, Lin Zhang, Dmitry Churkin   +5 more
openaire   +3 more sources

NLSE-based model of a random distributed feedback fiber laser [PDF]

SPIE Proceedings, 2014
In this work we propose a NLSE-based model of power and spectral properties of the random distributed feedback (DFB) fiber laser. The model is based on coupled set of non-linear Schrödinger equations for pump and Stokes waves with the distributed feedback due to Rayleigh scattering.
Smirnov, Sergei V., Churkin, Dmitry V.
core   +4 more sources

Limited-Feedback Distributed Relay Selection for Random Spatial Wireless Networks [PDF]

2019 IEEE Global Communications Conference (GLOBECOM), 2019
This paper considers a location-based optimal relay selection scheme for a relay-assisted wireless network where available decode-and- forward relays are distributed as a homogeneous Poisson point process. To solve an optimum relay selection problem, a central entity or the source requires information pertaining to all relay locations.
Hazer Inaltekin, Saman Atapattu, Jamie S. Evans   +2 more
openaire   +3 more sources

TUNABLE ULTRA-LONG RANDOM DISTRIBUTED FEEDBACK FIBER LASER [PDF]

Jurnal Teknologi, 2016
A 72 km open-ended symmetrical tunable random distributed feedback fiber laser (RDB-FL) with different pumping schemes is presented in this study. The random distributed feedback was contributed by Rayleigh scattering in the single-mode fiber while distributed gain was provided by the effect of stimulated Raman scattering.
Zainol Abidin, Nadiah Husseini, Abu Bakar, Muhammad Hafiz, Tamchek, Nizam, Mahdi, Mohd Adzir   +3 more
openaire   +4 more sources

Spatial location of correlations in a random distributed feedback Raman fiber laser [PDF]

Optics Letters, 2019
Nonlinear interactions between different components of multiwavelength radiation are one of the main processes shaping properties of quasi-CW fiber lasers. In random fiber lasers, nonlinear influence may be more complicated, as there are no distinct longitudinal modes in radiation because of the random nature of the feedback.
I. D. Vatnik, O. A. Gorbunov, S. Sugavanam, D. V. Churkin, E. V. Podivilov   +4 more
openaire   +4 more sources

Random distributed feedback Raman fiber laser with polarized pumping [PDF]

Laser Physics Letters, 2014
In this letter, the polarization properties of a random fiber laser operating via Raman gain and random distributed feedback owing to Rayleigh scattering are investigated for the first time. Using polarized pump, the partially polarized generation is obtained with a generation spectrum exhibiting discrete narrow spectral features contrary to the smooth
H Wu, Z N Wang, D V Churkin, I D Vatnik, M Q Fan, Y J Rao   +5 more
openaire   +3 more sources

Pump distribution effect in dual-wavelength Raman-erbium random distributed feedback fiber laser [PDF]

Optics Express, 2018
This work demonstrates a simple dual-wavelength random distributed feedback fiber laser via excitation of the Raman-erbium hybrid gain by a single pump source. Lasing wavelengths at 1568 nm and 1595 nm with 48.48 dBm maximum OSNR were generated without the need for physical reflectors.
N. H. Zainol Abidin, M. H. Abu Bakar, N. Tamchek, F. R Mahamd Adikan, M. A. Mahdi   +4 more
openaire   +5 more sources