High-efficiency generation of a continuous-wave single-frequency 780 nm laser by external-cavity frequency doubling.
We demonstrated a 670 mW continuous-wave single-frequency laser source at 780 nm by using external-cavity-enhanced second-harmonic generation of a seeded fiber amplifier in periodically poled lithium niobate. A maximum second-harmonic conversion efficiency of 58% was achieved. The source can work stably over 1 h by locking the frequency-doubling cavity, while the power stability is less than 2%.
Feng
Jinxia
J
State Key Laboratory of Quantum Optics and Quantum Optics Device, Institute of Opto-Electronics, Shanxi University, Taiyuan, China.
Li
Yongmin
Y
Liu
Qin
Q
Liu
Jianli
J
Zhang
Kuanshou
K