High-power low spatial coherence random fiber laser


A high-power multi-transverse modes random fiber laser (RFL) is investigated by combining a master oscillator power-amplifier (MOPA) configuration with a segment of extra-large mode area step-index multimode fiber (MMF). Spatial coherence of the high-power multi-transverse modes RFL has been analyzed, which shows that speckle contrast is reduced dramatically with the output power increasing. In this way, considerably low speckle contrast of ~0.01 is achieved under high laser power of ~56 W, which are the records for multi-transverse modes RFLs in both spatial coherence and output power. This work paves a way to develop high-power RFLs with very low spatial coherence for wide-range speckle-free imaging and free-space communication applications.

Publication DOI: https://doi.org/10.1364/OE.27.008738
Divisions: Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Engineering & Applied Sciences > Aston Institute of Photonics Technology
Additional Information: © 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Uncontrolled Keywords: Atomic and Molecular Physics, and Optics
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
https://www.osa ... ri=oe-27-6-8738 (Publisher URL)
PURE Output Type: Article
Published Date: 2019-03-11
Published Online Date: 2019-03-11
Accepted Date: 2019-02-19
Authors: Ma, Rui
Li, Jia Qi
Guo, Jia Yu
Wu, Han
Zhang, Hua Hui
Hu, Bo
Rao, Yun Jiang
Zhang, Wei Li ( 0000-0002-3584-8541)



Version: Published Version

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