Eye-safe single-frequency single-mode polarized all-fiber pulsed laser with peak power of 361  W

An all-fiber, single-frequency, single-mode linearly polarized, high peak power pulsed laser at 1540 nm for coherent Doppler wind lidar is demonstrated. A narrow-linewidth seed laser is pulse modulated by an acousto-optic modulator and then amplified by two-stage cascade amplifiers. An 0.8 m long er...

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Bibliographic Details
Published in:Applied optics (2004) 2014-04, Vol.53 (11), p.2465-2469
Main Authors: Zhang, Xin, Diao, Weifeng, Liu, Yuan, Zhu, Xiaopeng, Yang, Yan, Liu, Jiqiao, Hou, Xia, Chen, Weibiao
Format: Article
Language:English
Subjects:
Amplification
Amplifiers
Beams (radiation)
Cascades
Fibers
Gain
Pulse width
Pulsed lasers
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Summary:An all-fiber, single-frequency, single-mode linearly polarized, high peak power pulsed laser at 1540 nm for coherent Doppler wind lidar is demonstrated. A narrow-linewidth seed laser is pulse modulated by an acousto-optic modulator and then amplified by two-stage cascade amplifiers. An 0.8 m long erbium/ytterbium co-doped polarization-maintaining fiber with a core diameter of 10 μm is used as the gain fiber of a power amplifier, and longitudinally varied strains are applied on the gain fiber to realize approximately 3.4 times enhancement of the stimulated Brillouin scattering threshold. Peak power of 361 W pulse width of 200 ns at 10 kHz repetition rate is achieved with transform-limited linewidth and diffraction-limited beam quality. To the best of our knowledge, it is the highest peak power of an eye-safe, single-mode narrow-linewidth pulsed fiber laser based on 10 μm core diameter silica fiber.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.53.002465