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

doi:10.1364/OE.27.008738

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

Aston Institute of Photonic Technologies (AiPT)

Research output: Contribution to journal › Article › peer-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 language	English
Pages (from-to)	8738-8744
Number of pages	7
Journal	Optics Express
Volume	27
Issue number	6
DOIs	https://doi.org/10.1364/OE.27.008738
Publication status	Published - 11 Mar 2019

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10.1364/OE.27.008738

High-power low spatial coherence random fiber laser
© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Final published version, 3.22 MBLicence: Other

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title = "High-power low spatial coherence random fiber laser",

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.",

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doi = "10.1364/OE.27.008738",

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T1 - High-power low spatial coherence random fiber laser

AU - Ma, Rui

AU - Li, Jia Qi

AU - Guo, Jia Yu

AU - Wu, Han

AU - Zhang, Hua Hui

AU - Hu, Bo

AU - Rao, Yun Jiang

AU - Zhang, Wei Li

PY - 2019/3/11

Y1 - 2019/3/11

N2 - 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.

AB - 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.

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JO - Optics Express

JF - Optics Express

IS - 6

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High-power low spatial coherence random fiber laser

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