Abstract：Frequency stabilized laser with narrow line width has an extensive application in the industrial production control. However, the Frequency variation of free working semiconductor laser limits the use of laser device. To stabilize the frequency of semiconductor laser, this paper presents a new way which is based on second harmonic absorption characteristics to achieve frequency stabilization of narrow line width diode laser. We have measured the second harmonic signal of water vapor with DFB diode laser of 1.396 μm, and the results show that laser output wavelength drift in 100 hours has been effectively controlled within ±0.16 pm. The absorption peak doesn’t vary with environmental temperature after frequency stabilization. This method is simpler and more reliable and has broad application prospects for frequency stabilization of diode laser.
Key words：Laser optics; Frequency stabilization; Second harmonic; Distributed feedback laser; Proportion integral differential controller
梅教旭，汪 磊，谈 图，刘 锟，王贵师，高晓明. 基于二次谐波特性的DFB激光器稳频新方法研究[J]. 光谱学与光谱分析, 2019, 39(10): 2989-2992.
MEI Jiao-xu, WANG Lei, TAN Tu, LIU Kun, WANG Gui-shi, GAO Xiao-ming. A New Method of DFB Laser Frequency Stabilization Based on the Characteristics of the Second Harmonic. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2019, 39(10): 2989-2992.
