Stable continuous-wave single-frequency intracavity frequency-doubled laser with intensity noise suppressed in audio frequency region

Gao Ying-Hao¹, Li Yuan-Ji^{1, 2, †}, Feng Jin-Xia^{1, 2}, Zhang Kuan-Shou^{1, 2}

Experimental setup of high power cw single-frequency dual-wavelength laser and stabilization system. LPF: low pass filter; M: mixer; HV: high voltage amplifier; AMP: power amplifier; dc: direct current source; OI: optical isolator; EOM: electro-optic modulator; PID: proportional-integral-derivative amplifier; A and B: negative power combiner; +/−: positive/negative power combiner; SA: spectrum analyzer.