1560nm CW diode laser frequency doubling by using PPLN crystal and frequency locking via rubidium absorption spectroscopy

Jianfeng Yang; Baodong Yang; Jing Gao; Tiancai Zhang; Junmin Wang

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1560nm CW diode laser frequency doubling by using PPLN crystal and frequency locking via rubidium absorption spectroscopy

Jianfeng Yang,Baodong Yang,Jing Gao,Tiancai Zhang,Junmin Wang * #

State Key Laboratory of Quantum Optics and Quantum Optics Devices,and Institute of Opto-Electronics, Shanxi University

*Correspondence author

#Submitted by

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Funding: none

Opened online:19 May 2010

Accepted by: none

Citation: Jianfeng Yang,Baodong Yang,Jing Gao.1560nm CW diode laser frequency doubling by using PPLN crystal and frequency locking via rubidium absorption spectroscopy[OL]. [19 May 2010] http://en.paper.edu.cn/en_releasepaper/content/4371772

Locking laser to a proper reference can obviously improved the laser frequency stability. We can lock 1560nm distributed feedback (DFB) diode laser to Rubidium absorption line via second harmonic generation (SHG). The second harmonic wave is produced by use of a PPLN crystal in our experiment. About 25 mW of output power at 780nm is generated when input power of fundamental wave is 1.6W, and the nonlinear conversion efficiency is 0.96%/W. we stabilized the laser frequency on Rubidium absorption spectroscopy, and the residual frequency fluctuation is 3.5 MHz in 30 s.

Keywords:distributed-feedback (DFB) diode laser;frequency doubling;frequency locking;rubidium atoms;absorption spectra

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