980 nm高稳定度激光泵浦源控制系统

田小建; 尚祖国; 高博; 吴戈

doi:doi:10.3788/ope.20152304.0982

光学精密工程, 2015, 23 (4): 982, 网络出版: 2015-05-20

980 nm高稳定度激光泵浦源控制系统

Control system for 980 nm high stability laser pump source

论文大纲

田小建尚祖国 ^*高博吴戈

作者单位

吉林大学电子科学与工程学院，吉林长春 130012

摘要

设计、制作了一款980 nm高稳定度激光泵浦源控制系统,以满足掺铒光纤放大器(EDFA)稳定工作的需要。首先，以恒流激励原理设计了控制系统的驱动单元。接着，使用半导体制冷器(TEC)作为泵浦源的温度控制手段，设计了控制系统的温度控制单元。为了验证控制系统的有效性，选用一款激光泵浦模块组成了完整的激光泵浦源系统。最后，对激光泵浦源的激光输出进行了实验，研究了光功率与驱动电流的关系，以及系统的光功率稳定度与光谱稳定性等。对系统进行了相关测试实验，结果显示: 应用了本控制系统的激光泵浦源的激光输出中心波长为975.2 nm，光功率可达600 mW，短期光功率稳定度为±0.008 dB，长期光功率稳定度为±0.05 dB，比同类激光泵浦源具有更高的稳定度。得到的结果表明: 所设计的激光泵浦源控制系统满足设计要求，具有一定的实用价值。

Abstract

A high stable control system for a 980 nm laser pump source was designed and fabricated to Er- doped optical fiber amplifiers for their stable operations. Firstly , a drive unit of the control system was designed based on the principle of a constant current excitation. Followed that，a temperature control unit of the control system was designed by using a Thermoelectric Cooler (TEC) as the measure of temperature control. Then, a complete laser pump source was assembled to verify the effectiveness of the control system. Finally, the output characteristics of the laser pump source was investigated experimentally including the relation between light power and driving current, and the stability of optical power and spectrum. The corresponding tests were performed, and results show that the center wavelength of the laser pump source is 975.2 nm, the optical power reaches 600 mW, and the power stabilities in a short-term and a long-term are ± 0.008 dB and ± 0.05 dB, respectively. As compared with the similar laser pump source, it has a high stability. It indicates that the laser pump source with the designed control system meets the design requirements, and has a certain practical value.

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田小建, 尚祖国, 高博, 吴戈. 980 nm高稳定度激光泵浦源控制系统[J]. 光学精密工程, 2015, 23(4): 982. TIAN Xiao-jian, SHANG Zu-guo, GAO Bo, WU Ge. Control system for 980 nm high stability laser pump source[J]. Optics and Precision Engineering, 2015, 23(4): 982.

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