短語詞組短語laser self frequency doubling 激光自倍頻laser diode frequency doubling 激光倍頻材料laser self frequency doubling crystal 激光自倍頻晶躰CO2 laser frequency doubling CO2 激光倍頻laser frequency doubling systems 激光倍頻系統(tǒng)laser self -frequency-doubling 激光自倍頻frequency doubling laser 倍頻激光self frequency doubling laser crystal 自倍頻激光晶躰 返回 laser frequency doubling