Results 241 to 250 of about 41,002 (282)

Tunable random fiber laser

Physical Review A, 2011
An optical fiber is treated as a natural one-dimensional random system where lasing is possible due to a combination of Rayleigh scattering by refractive index inhomogeneities and distributed amplification through the Raman effect. We present such a random fiber laser that is tunable over a broad wavelength range with uniquely flat output power and ...
Babin, S. A., El-Taher, A. E., Harper, P., Podivilov, E. V., Turitsyn, S. K.   +4 more
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Thulium-doped fiber random laser using random fiber grating for random feedback

2021 19th International Conference on Optical Communications and Networks (ICOCN), 2021
We report on a Thulium-doped fiber random laser which uses a random fiber grating for distributed random feedback. The random fiber grating fabricated by using a femtosecond laser provides enhanced Rayleigh scattering in random feedback fiber so the total fiber length of the Thulium-doped fiber random laser is greatly reduced. A high-reflectivity fiber
Decai Zhu, Yaozong Hu, Xinyong Dong
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Fiber-coupled random laser

Applied Physics Letters, 2004
We demonstrate that in fiber-coupled random laser, the threshold energy is twofold reduced and the slope efficiency is fivefold increased when the tip of the fiber is relocated from the surface to the depth of the powder volume. High absorption efficiency, 85%, and high conversion efficiency of population inversion to stimulated emission, 90%, make ...
Mikhail A. Noginov, Guohua Zhu, Ichesia Fowlkes   +2 more
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THEORY OF A RANDOM FIBER LASER

Журнал Экспериментальной и Теоретической Физики, 2014
We develop the theory explaining the role of nonlinearity in generation of radiation in a fiber laser that is pumped by external light. The pumping energy is converted into the generating signal due to the Raman scattering supplying an effective gain for the signal.
I. V. Kolokolov, V. V. Lebedev, E. V. Podivilov, S. S. Vergeles   +3 more
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Random fiber laser based on artificially controlled backscattering fibers

Applied Optics, 2017
The random fiber laser (RFL), which is a milestone in laser physics and nonlinear optics, has attracted considerable attention recently. Most previously reported RFLs are based on distributed feedback of Rayleigh scattering amplified through the stimulated Raman-Brillouin scattering effect in single-mode fibers, which require long-distance (tens of ...
Xiaoliang, Wang, Daru, Chen, Haitao, Li, Lijuan, She, Qiong, Wu   +4 more
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Random Laser with Erbium-Doped Fiber and fs-Laser Introduced Random Fiber Grating

2018 Asia Communications and Photonics Conference (ACP), 2018
A novel half cavity random fiber laser is demonstrated by using erbium-doped fiber as gain media, a fs- laser introduced random fiber grating to provide random distributed feedback and a strong chirped-fiber Bragg grating to form half-cavity configuration. A relatively low threshold power of 33 mW is achieved for 980 nm pump.
Jingxuan Song, Xinyong Dong, Ziyang Guo, Ben Xu, Dongning Wang   +4 more
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Theoretical study of Raman fiber laser and random fiber laser

AOPC 2017: Laser Components, Systems, and Applications, 2017
We present results on Raman fiber laser and random fiber laser. We theoretically analyzed the optical conversion efficiency in core and cladding pumped Raman fiber lasers. For cladding pumped Raman fiber laser, we change the cladding area and core area ration, fiber length, reflectivity of output FBG, Raman gain for improving the laser efficiency.
Jianquan Yao, Quan Sheng, Shijie Fu, Wei Shi, Zhaoxin Xie   +4 more
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Polarization-modulated random fiber laser

Laser Physics Letters, 2016
In this letter, we propose and experimentally demonstrate a polarization-modulated random fiber laser (RFL) for the first time. It is found that the output power of the half-opened RFL with polarized pumping is sensitive to the state of polarization (SOP) of the Stokes light in a fiber loop acting as a mirror.
Han Wu, Zinan Wang, Qiheng He, Mengqiu Fan, Yunqi Li, Wei Sun, Li Zhang, Yi Li, Yunjiang Rao   +8 more
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Modes in Fiber Random Laser

Conference on Lasers and Electro-Optics 2010, 2010
We present the results of the experimental and theoretical studies of the random laser based on an Er/Ge co-doped single-mode fiber with randomly spaced Bragg gratings.
V. Freilikher, Y. Bliokh, N. Lizárraga, E. I. Chaikina, E. R. Méndez   +4 more
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Quasi-kilowatt random fiber laser

Optics Letters, 2019
The random distributed-feedback Raman fiber laser (RRFL) is a new approach to obtain a high-power laser. In this Letter, we report a RRFL with quasi-kilowatt output power for the first time based on a half-open cavity. It consists of a piece of a large-mode-area passive fiber with a core diameter of 20 μm and a high-reflectivity fiber Bragg grating ...
Hanwei Zhang, Long Huang, Jiaxin Song, Han Wu, Pu Zhou, Xiaolin Wang, Jian Wu, Jiangming Xu, Zinan Wang, Xiaojun Xu, Yunjiang Rao   +10 more
openaire   +1 more source