短語詞組短語laser beam modulation frequency 激光頻率laser beam modulation frequency multiplier 激光倍頻器laser beam modulation frequency stabilization 激光穩(wěn)頻laser beam modulation frequency stability 激光器頻率穩(wěn)定度single -beam frequency division modulation 單光束分頻調(diào)制 返回 beam modulation frequency