Study on asynchronous locking technology of femtosecond fiber laser with full deflection maintaining
In this paper,a terahertz dual-comb ranging system is constructed based on a fully bias-maintaining erbium-doped fiber laser,phase-locked loop system and terahertz ranging optical path.In the experiment,the full bias-maintaining erbium-doped fiber laser had a repetition frequency of 79.261 MHz,and the repetition frequency was locked and the frequency was adjustable at 1.54 MHz by piezoelectric ceramic(PZT)and stepper motor(SM)dual-stage feedback control scheme.The peak-peak jitter and standard deviation of jitter were±1.5 mHz and 0.4 mHz respectively.The repetition frequency difference of the dual-comb was set at 10 Hz,and the maximum jitter and standard deviation of repetition frequency difference within 10 min were calculated to be 3 mHz and 0.6 mHz.Furthermore,the asynchronous sampling dual-comb system was applied to the terahertz ranging,and the error of measuring the moving distance was 3 µm.The system has the advantages of high locking precision and strong stability,and is expected to be used in biological nondestructive testing and industrial precision machining.
dual-comberbium-doped fiber laserphase-locked looprepetition frequency locking
NETL
NSTL
万方数据
维普
