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Ultrafast Raman fiber Laser with Random Distributed Feedback
Author(s) -
Pan Weiwei,
Zhang Lei,
Jiang Huawei,
Yang Xuezong,
Cui Shuzhen,
Feng Yan
Publication year - 2018
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.201700326
Subject(s) - ultrashort pulse , fiber laser , materials science , optics , laser , lasing threshold , random laser , raman spectroscopy , raman laser , raman scattering , optoelectronics , laser power scaling , distributed feedback laser , physics
Ultrafast Raman fiber lasers are wavelength‐agile light sources for various scientific and medical applications. Pulse pumping is an efficient way to generate a high power ultrafast Raman fiber laser, which however requires real‐time synchronization between the pump pulses and laser cavity. A pulse pumped Raman fiber laser with random distributed feedback is investigated. Under repetitive pulse pumping, compound cavities based on distributed Rayleigh scattering are formed automatically to synchronize with the pump pulse train. In a proof of principle experiment, self‐synchronization is observed and a stable picosecond pulsed random laser is generated at 1120 nm with an average power of 170 mW. Raman gain and random distributed feedback are spatially separated in the present pulse pumped laser configuration. This allows a direct characterization of the random distributed feedback and a comparison between random lasing and amplified spontaneous emission, which is not possible in previous continuous wave pumped random Raman fiber lasers.