利用光纤飞秒激光器与光纤耦合型太赫兹光电导天线,构建了一套全光纤太赫兹频率梳系统。基于锁相技术实现了对频率梳重复频率信号的高稳定度锁定,在取样时间为100 s时锁定精度达到3.3×10-13,并获得了信噪比优于50 d B的太赫兹拍频信号。基于频率梳测试方法实现了太赫兹频率的高精度测量,测量不确定度为5×10~(-11)。 An all-fiber terahertz frequency comb system is constructed by using fiber femtosecond laser and fiber-coupled terahertz photoconductive antenna. Based on the phase-lock technique, the high-stability locking of frequency comb repetition frequency signal is achieved. The locking accuracy reaches 3.3 × 10-13 at sampling time of 100 s, and the THz beat frequency with signal-to-noise ratio better than 50 d B signal. Based on the frequency comb test method, the high-precision measurement of terahertz frequency is realized with the measurement uncertainty of 5 × 10 ~ (-11).