全保偏双飞秒光纤光频梳系统的频率联动特性

Frequency Linkage between the Dual Frequency Combs Based on the Polarization-Maintaining Femtosecond Fiber Laser

采用跟踪反馈控制法,实现了双飞秒光频梳系统的频率联动,研究了主动光频梳自动扫频和手动扫频情况下,双光梳间的频率联动特性.结果显示,对主动光频梳进行自动扫频或手动扫频时,从动光频梳的频率跟随变化,且双光梳频率间的相关系数最大可达0.99,说明双光梳的频率间保持了较好的联动特性.最后,将频率联动的全保偏双光梳系统用于测距实验中,测量距离为1.332m,时间间隔为0.2s,连续进行16次测量,测得数据的标准差为0.35μm,测量精度可达亚微米量级.

The frequency linkage between the dual frequency combs was realized by using of the tracking feedback controlling circuit.The linkage characteristic was studied when the master frequency comb＇s frquency is changed automatically and manully respectively.The results show that,the frequency of the slave frequency comb is varied following the automatic or manual frequency scanning of the master frequency comb.The max correlation coifficient between the frequency of the dual frequency combs is up to 0.99,which demonstrates the better linkage characteristic.Finally,the linked dual frequency combs was used in the abosulate distance measurement.The measured distance is 1.332 m,the interval is0.2s,the standard deviation of the experimental results is 0.35μm with 16 times,and the measurement precision is less than 1μm.