arXiv 2407.196412024-07-29physics.opticsphysics.app-ph

基于宽调谐DBR光纤种子源的高效率120W 1018nm单频窄线宽放大

High efficient 120W 1018nm single-frequency narrow linewidth amplification based on wide-tunable DBR fiber seed source

Pan Li, Linfeng Li, Mingze Wang, KaiMing Cao, Ruihong Gao, Heshan Liu, Meng Shi, Ziren Luo

备注：: 13 pages, 11 figures

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AI总结：

本文基于宽调谐DBR光纤种子源，采用多级光纤放大结构与优化掺杂光纤，实现了120W单频窄线宽1018nm激光输出，斜率效率达77.3%，光束质量因子M2小于1.3。

摘要：

本文报道了基于宽调谐DBR光纤种子源实现120W单频窄线宽1018nm激光的成果。该DBR结构种子源采用长8mm的掺杂光纤，线宽为3.25k。在1°C至95°C的温度范围内，该种子源的波长调谐范围超过1.5nm。调谐波长与温度表现出极高的线性度，且在调谐过程中无跳模现象。通过采用多级光纤放大结构、选择合适的掺杂光纤并优化其长度，实现了输出功率超过120W的1018nm激光。测量结果表明，主放大的斜率效率为77.3%，放大自发辐射（ASE）抑制比大于60 dB。输出线宽为10.3 kHz，光束质量因子M2小于1.3。

英文摘要：

This paper reports the achievement of 120W single-frequency narrow linewidth 1018nm laser based on wide-tunable DBR fiber seed source. The DBR structure seed source uses 8mm long doped optical fibers with a line width of 3.25k. The wavelength tuning range of this seed source exceeds 1.5 nm with the temperature range from 1°C to 95°C. The tuning wavelength and temperature show extremely high linearity, and there is no mode hopping during the tuning process. By adopting a multi-level fiber amplification structure, selecting appropriate doped fibers and optimizing their length, an output power exceeding 120W of 1018nm laser has been achieved. Measurement results indicate that the slope efficiency of the main amplification 77.3%, with an amplified spontaneous emission (ASE) suppression ratio greater than 60 dB. he output linewidth is 10.3 kHz, and the beam quality factor M2 is less than 1.3.

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