| Citation: | LI Can, REN Bo, ZHANG Jia-yi, WANG Tao, TANG Zhen-qiang, HE Zhi-wen, ZHOU Yi, LENG Jin-yong, ZHOU Pu. Pulse compression techniques in ultrafast fiber laser coherent beam combination[J]. Chinese Optics. doi: 10.37188/CO.2025-0100
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In recent years, ultrafast fiber laser coherent beam combination (CBC) has developed rapidly, becoming an important technical means for enhancing the average power of ultrafast and ultra-intense lasers. However, due to factors such as spectral gain narrowing in single-channel fiber amplifiers and high-order dispersion mismatch, the output pulse width of high-power ultrafast fiber laser CBC systems is significantly wider compared to that of bulk solid-state laser systems, severely limiting its peak power enhancement. From the perspective of pulse compression in ultrafast fiber laser coherent combining, this review systematically analyzes the following three aspects: pulse shaping technique based on fiber chirped pulse amplification, combining technique based on fiber nonlinear spectral broadening, and coherent spectral combining technique based on partial spectral interference. Additionally, a brief conclusion and outlook on the future development of ultra-short pulse fiber laser CBC is given at the end.
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