|引用本文：崔佳华,林百科,孟飞,曹士英,杨明哲,林弋戈,宋有建,胡明列,方占军.相位锁定至超窄线宽激光的高相干性双光梳研究[J].红外与毫米波学报,2020,39(1):25~31].CUI Jia-Hua,LIN Bai-Ke,MENG Fei,CAO Shi-Ying,YANG Ming-Zhe,LIN Yi-Ge,SONG You-Jian,HU Ming-Lie,FANG Zhan-Jun.High coherence dual-comb based on phase locking to ultra-narrow linewidth lasers[J].J.Infrared Millim.Waves,2020,39(1):25~31.]
|Abstract:A dual-comb system based on phase locking to ultra-narrow linewidth lasers is studied and implemented in this paper. Two Erbium-doped mode-locked lasers with repetition rates of about 200 MHz and repetition rate difference of about 17 kHz were simultaneously locked to two narrow-linewidth continuous wave lasers at 1 542 nm and 1 560 nm, respectively. Hence, dual-comb with high coherence and stability is achieved. After phase locking, the comb linewidth of a single comb is less than 5 Hz（limited by test condition）, and the relative linewidth of two combs is less than 0.35 Hz. The dual comb system has important application value in high precision spectral analysis, time-frequency transmission, and especially absolute distance measurement.