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设计了一个高精度温控可调光栅滤波器。采用铝槽对光纤光栅进行封装,使光栅免受应变作用,然后使用高精度温控模块对铝槽封装的光栅进行温度控制,从而实现保持光纤光栅中心波长长期稳定的目的。该光纤滤波器温控模块采用三块温控芯片MAX1978并行工作的方式提高温控效果,温控精度可达0.1℃,动态范围10℃~40℃连续可调。在不同环境温度下测试光栅稳定性,光栅中心波长标准差为0.0016nm。实验结果证明了该设计的可行性。
A high precision temperature control adjustable grating filter was designed. The aluminum grating is used to encapsulate the fiber grating to prevent the grating from strain. Then, a high-precision temperature control module is used to control the temperature of the grating of the aluminum groove package so as to maintain the long-term stability of the center wavelength of the fiber grating. The optical fiber filter temperature control module uses three temperature control chips MAX1978 parallel work to improve the temperature control effect, temperature control accuracy of 0.1 ℃, the dynamic range of 10 ℃ ~ 40 ℃ continuously adjustable. The grating stability was tested at different ambient temperatures with a standard deviation of 0.0016 nm at the center of the grating. The experimental results prove the feasibility of the design.