High-power low spatial coherence random fiber laser

Rui Ma, Jia Qi Li, Jia Yu Guo, Han Wu, Hua Hui Zhang, Bo Hu, Yun Jiang Rao*, Wei Li Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)8738-8744
Number of pages7
JournalOptics Express
Volume27
Issue number6
Early online date11 Mar 2019
DOIs
Publication statusE-pub ahead of print - 11 Mar 2019

Bibliographical note

© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

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