中文说明：
在光纤环形腔中经过级联四波混频产生光频率梳，梳齿频率间隔可调，光纤环形腔中不同模块色散，非线性系数可调。
English Description：
In the optical fiber ring cavity after cascade four-wave mixing to produce optical frequency comb, comb frequency interval is adjustable, dispersion optical fiber ring cavity in different module, nonlinear coefficient is adjustable.