一种温度不敏感型阵列波导光栅的研究

Study on a Temperature-Insensitive Arrayed Waveguide Grating

研究了的一种新型温度不敏感型阵列波导光栅 (AWG)。该新型温度不敏感型阵列波导光栅的波导采用混合材料的波导结构 ,该混合材料波导通过在石英波导芯层上旋涂聚合物材料的上包层 ,达到改变波导温度特性的目的 ,使得阵列波导光栅的温度敏感性降低。通过理论分析和有限差分方法研究了其中两种结构 :三层混合材料波导构成的阵列波导光栅和四层混合材料波导构成的阵列波导光栅 ,计算了该新型温度不敏感型阵列波导光栅的温度特性。结果表明 ,在一定的设计下 ,温度变化 0～ 5 0℃时 ,这两种温度不敏感型阵列波导光栅的最大波长漂移量小于 0 .0 3nm ,不到无温度控制时常规阵列波导光栅最大波长漂移量的 4 %。

A new type of temperature insensitive arrayed waveguide grating (AWG) was studied. Hybrid material waveguide structure in which polymer material was spun on the silica core was adapted in this temperature insensitive arrayed waveguide grating to change the characteristic of the waveguide and then reduce the sensitivity of the arrayed waveguide grating. Two kinds of structure that were the three layer structure and the four layer structure were studied by theoretical and finite difference methods. The temperature characteristics of this arrayed waveguide grating were calculated. The simulation results showed that when temperature change was 0～50 ℃, the maximum wavelength shift of the temperature insensitive arrayed waveguide grating was less than 0.03 nm, which was less than 4% of that of the ordinary arrayed waveguide grating.