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4 March 2022 Evolution of relative intensity noise and beam pointing error in high-power single-frequency fiber amplifiers
Pengfei Ma, Wei Liu, Wei Li, Wenchang Lai, Shuai Ren, Pu Zhou
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Proceedings Volume PC11981, Fiber Lasers XIX: Technology and Systems; PC119810G (2022) https://doi.org/10.1117/12.2614733
Event: SPIE LASE, 2022, San Francisco, California, United States
Abstract
In this report, by comparing the RIN and beam pointing error of the signal laser at different output powers, the impact of the modal degeneration on both the spacial and temporal noise properties of high-power single-frequency fiber amplifiers will be demonstrated. The new finding reveal that obvious mode-related enhancement of the RIN could occur well below the conventional transverse mode instability (TMI) threshold of the fiber amplifier while the mode-related enhancement of the beam pointing error occurs near the TMI threshold. This work could provide a new insight for obtaining high-power, high spacial stability and low-noise single-frequency fiber lasers.
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Pengfei Ma, Wei Liu, Wei Li, Wenchang Lai, Shuai Ren, and Pu Zhou "Evolution of relative intensity noise and beam pointing error in high-power single-frequency fiber amplifiers", Proc. SPIE PC11981, Fiber Lasers XIX: Technology and Systems, PC119810G (4 March 2022); https://doi.org/10.1117/12.2614733
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KEYWORDS
Fiber amplifiers
Fiber lasers
Interference (communication)
Superposition
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