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基于外腔的高效频率转换,尤其是当系统运行在抽运不消耗近似机理下,信号光可实现大于90%的转换,因此无法通过信号光直接获得其到腔模频率锁定的误差信号.本文通过对信号光调制、和频光解调的方法获得了该误差信号,实现了双波长激光到外腔腔模的级联锁定.实验中外部环形腔将1.3 W的1064 nm抽运光放大到约14.3 W.当1583 nm信号光从10μW变化到50 mW,其到636 nm和频光的转化效率约为73%;当从50 mW变化到295 mW时,转换效率呈线性降低到60%,最终获得了440 mW的636 nm激光.
Based on the external cavity efficient frequency conversion, especially when the system is operating in the pump-less approximation mechanism, the signal light can achieve more than 90% conversion, so it can not directly obtain the error signal of locking to the cavity mode frequency by the signal light. The error signal is obtained by demodulating the signal light and the frequency light, and the cascade locking of the two-wavelength laser to the external cavity mode is realized. In the experiment, the external annular cavity amplifies the 1.3 W 1064 nm pump light to About 14.3 W. When the 1583 nm signal light changes from 10 μW to 50 mW, its conversion efficiency to 636 nm and the frequency of light is about 73%; when it changes from 50 mW to 295 mW, the conversion efficiency decreases linearly to 60% The result was a 440 mW 636 nm laser.