量子光学学报, 2010, 16 (1): 41, 网络出版: 2010-08-23
1560 nm连续光半导体激光器经PPLN倍频及经铷吸收光谱稳频
1560 nm CW Diode Laser Frequency Doubling by Using PPLN Crystaland Frequency Locking via Rubidium Absorption Spectroscopy
分布反馈式半导体激光器 铷原子 吸收光谱 倍频 锁频 distributed feedback diode laser rubidium atom absorption spectra frequency doubling frequency locking
摘要
将激光器锁定到合适的参考频率上,可以有效地改变激光器的频率稳定性。1 560 nm的分布反馈式半导体激光器,可以通过倍频锁定于铷原子吸收线上。实验中我们利用PPLN准位相匹配晶体进行倍频,当输入光为1.6 W时可以获得25 mW的倍频光,非线性转换系数为0.96 %/W。我们还将激光器的频率锁定于Rb原子的吸收线上,30 s内剩余频率起伏约为±3.5 MHz。
Abstract
Locking laser to a proper reference frequency can obviously improve the laser frequency stability.We can lock 1 560 nm 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 780 nm is generated when input power of fundamental wave is 1.6 W,and the nonlinear conversion efficiency is 0.96 %/W.We stabilize the laser frequency on rubidium absorption spectroscopy,and the residual frequency fluctuation is ±3.5 MHz in 30 s.
杨建峰, 杨保东, 高静, 张天才, 王军民. 1560 nm连续光半导体激光器经PPLN倍频及经铷吸收光谱稳频[J]. 量子光学学报, 2010, 16(1): 41. YANG Jian-feng, YANG Bao-dong, GAO Jing, ZHANG Tian-cai, WANG Jun-min. 1560 nm CW Diode Laser Frequency Doubling by Using PPLN Crystaland Frequency Locking via Rubidium Absorption Spectroscopy[J]. Acta Sinica Quantum Optica, 2010, 16(1): 41.