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4 March 2022 Kilowatt-level, narrow linewidth, polarization-maintained fiber amplifier based MPCS modulation and laser gain competition
Wenchang Lai, Pengfei Ma, Jiaxin Song, Shuai Ren, Wei Liu, Pu Zhou
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Proceedings Volume PC11981, Fiber Lasers XIX: Technology and Systems; PC119810H (2022) https://doi.org/10.1117/12.2614248
Event: SPIE LASE, 2022, San Francisco, California, United States
Abstract
A novel phase modulation technique, calling multi-phase coded signal (MPCS) modulation, is demonstrated for stimulated Brillouin scattering (SBS) effect managing in high power narrow-linewidth polarization-maintained all-fiber amplifier. Combining with laser gain competition where two signal lasers operating at 1045 nm and 1064 nm are applied, the output power of 1064 nm laser could be boosted to 1023 W with FWHM linewidth of 4.6 GHz. The polarization extinction ratio (PER) is 13.3 dB and the output beam quality is measured to be M2=1.11. This work could provide a feasible method for linewidth controlling in high power narrow linewidth fiber amplifier.
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Wenchang Lai, Pengfei Ma, Jiaxin Song, Shuai Ren, Wei Liu, and Pu Zhou "Kilowatt-level, narrow linewidth, polarization-maintained fiber amplifier based MPCS modulation and laser gain competition", Proc. SPIE PC11981, Fiber Lasers XIX: Technology and Systems, PC119810H (4 March 2022); https://doi.org/10.1117/12.2614248
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KEYWORDS
Modulation
Fiber amplifiers
Fiber lasers
Amplifiers
Beam quality measurement
Interference (communication)
Optical testing
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