MG-Y激光器波长温度特性研究

Research on Temperature Characteristics of Wavelength of MG-Y Laser

摘要:

为了探究调制光栅Y分支(MG-Y)激光器在光纤传感应用中的温度适应性,设计并搭建了波长稳定性为0.6pm的测试系统,分别对MG-Y激光器内外不同温度下的波长特性进行分析,采用25℃温度下20pm间隔的查找表进行实验。结果表明当内部温度为25℃、外界温度在-20~50℃范围内以10℃步进时,92.30%的波长漂移量在±7pm内,内外温差±5℃范围内波长最大漂移量为3pm；当外界温度为25℃、内部温度在25~30℃范围内以1℃步进时,波长调谐段切换处会出现跳模现象,调谐段内近似线性调谐,调谐系数区间为85~115pm/℃,证明MG-Y激光器的最佳温度应控制在内外温差±5℃范围内,为解决温度变化造成的波长漂移问题提供了参考。

Abstract:

In order to explore the temperature adaptability of modulated grating Y-branch (MG-Y) laser in optical fiber sensing application, a test system with wavelength stability of 0.6pm was designed and built. The wavelength characteristics of MG-Y laser at different internal and external temperatures were explored respectively, and the experiments were carried out with a look-up table with an interval of 20pm at 25℃. The results show that 92.30% of the wavelength drift is within ±7pm when the internal temperature is 25℃ and the external temperature is in the range of -20~50℃ and steps by 10℃, and the maximum wavelength drift is 3pm with the internal and external temperature difference of ±5℃. When the external temperature is 25℃ and the internal temperature is in the range of 25~30℃ and steps by 1℃, the mode hopping phenomenon will appear at the switching of the wavelength tuning section. The tuning coefficient range is 85~115pm/℃. It is proved that the optimal temperature of MG-Y laser should be controlled within the range of internal and external temperature difference of ±5℃, which provides a reference for solving the problem of wavelength drift caused by temperature change.