A fiber laser source for coherent wind lidar applications

doi:10.3969/j.issn.1007-5461.2026.03.008

Abstract

Abstract: Aiming to the requirement of narrow-linewidth single-frequency fiber laser for coherent wind lidar, a 1.55 μm waveband master oscillator power amplifier (MOPA) pulsed fiber laser source has been designed and developed. The MOPA laser source uses a home-made single-frequency narrow-linewidth distributed Bragg reflection fiber laser as seed source. The cascaded fiber amplifier link is optimized to effectively suppress the stimulated Brillouin scattering effect and the accumulation of amplified spontaneous emission, and the modulation waveform of acousto-optic modulator (AOM) is optimized using the "pre-emphasis" method to alleviate the pulse waveform distortion caused by the gain dynamic effect of the fiber amplifier, so that efficient energy enhancement is achieved for low-energy, low-repetition-rate, hundred-nanosecond laser pulses. At a repetition rate of 15 kHz, the output pulse width and pulse energy of the MOPA laser source are 685 ns and 27.6 μJ, respectively, and the output pulse train has excellent single transverse mode and linear polarization characteristics. Coherent detection experiments were performed on a distant stationary retroreflector at a distance of 1.56 km, and the results show that the MOPA laser source can meet the application requirements of coherent wind lidar.

Key words: fiber laser, pulse, coherent detection, wind lidar

CLC Number:

YUE Chunge , , LIU Xiaobing , , ZHANG Dong , , YAO Bo , , MAO Qinghe , . A fiber laser source for coherent wind lidar applications[J]. Chinese Journal of Quantum Electronics, 2026, 43(3): 412-420.

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