高精度温控可调光栅滤波器的设计

Design of Tunable Grating Filter Based on High-Precision Temperature Control

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。

We present a design of tunable grating filter based on high-precision temperature control. We use aluminum groove to encapsulate the grating so that it is insusceptible to strain. Then we design a high-precision temperature control module composed of 3 pieces of temperature control chips MAX1978 working in parallel to monitor and control the temperature of aluminum groove, thus achieving the long-term stability of center wavelength of the tunable grating filter. The temperature accuracy can reach 0.1 ℃, with the dynamic range of 10 ℃ -40 ℃ continuously adjustable. The tunable grating filter based on this temperature control module can reach 0. 0016 nm wavelength stability at center wavelength. The experimental results confirm the configuration＇s feasibility.