title: High-efficiency generation of a continuous-wave single-frequency 780 nm laser by external-cavity frequency doubling.
abstract: 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%.
authors.affiliation: State Key Laboratory of Quantum Optics and Quantum Optics Device, Institute of Opto-Electronics, Shanxi University, Taiyuan, China.
authors.forename: Jinxia
authors.initials: J
authors.lastname: Feng
authors.forename: Yongmin
authors.initials: Y
authors.lastname: Li
authors.forename: Qin
authors.initials: Q
authors.lastname: Liu
authors.forename: Jianli
authors.initials: J
authors.lastname: Liu
authors.forename: Kuanshou
authors.initials: K
authors.lastname: Zhang