Dynamic Wavelength Characteristics of Semiconductor Laser in Electric Current Tuning Process
LIU Jing-wang1,2, LI Zhong-yang3, ZHANG Wei-zhong4, WANG Qing-chuan4, AN Ying5, LI Yong-hui2
1. Postdoctoral Scientific Research Station, China Center for Industrial Security Research, Beijing Jiaotong University, Beijing 100044, China 2. Department of Science & Technology, North China Institute of Aerospace Engineering, Langfang 065000, China 3. Institute of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450045, China 4. Langfang Meteorological Bureau of Hebei Province, Langfang 065000, China 5. College of Information Engineering, North China University of Science Technology, Tangshan 063009, China
Abstract：In order to measure the dynamic wavelength of semiconductor lasers under current tuning, an improved method of fiber delay self-heterodyne interferometer was proposed. The measurement principle, as well the beat frequency and dynamic wavelength of recursive relations are theoretically analyzed. The application of the experimental system measured the dynamic wavelength characteristics of distributed feedback semiconductor laser and the static wavelength characteristics measurement by the spectrometer. The comparison between the two values indicates that both dynamic and static wavelength characteristic with the current tuning are the similar non-linear curve. In 20~100 mA current tuning range, the difference of them is less than 0.002 nm. At the same time, according to the absorption lines of CO2 gas, and HITRAN spectrum library, we can identify the dynamic wavelength of the laser. Comparing it with dynamic wavelength calculated by the beat signal, the difference is only 0.001 nm, which verifies the reliability of the experimental system to measure the dynamic wavelength.
Key words：Lasers;Dynamic wavelength;Fiber delayed self-heterodyne interferometer (FDSHI);Electric current tuning;Gas absorption
刘景旺1,2，李忠洋3，张卫中4，王清川4，安 颖5，李永辉2. DFB半导体激光器调谐动态波长特性研究[J]. 光谱学与光谱分析, 2015, 35(11): 3220-3223.
LIU Jing-wang1,2, LI Zhong-yang3, ZHANG Wei-zhong4, WANG Qing-chuan4, AN Ying5, LI Yong-hui2. Dynamic Wavelength Characteristics of Semiconductor Laser in Electric Current Tuning Process. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2015, 35(11): 3220-3223.
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