Fiber Bragg Grating or FBG sensors are widely adopted in fields of structural health and temperature monitoring. The increasing demand for compact, high-performance FBG interrogators is highly desired. We have designed and fabricated high-performance arrayed waveguide gratings or AWGs using SOI technology with different parameters in FBG interrogator systems applications. Key parameters that affect FBG interrogating performance during AWG design are theoretically investigated and experimentally demonstrated. Using our proposed and optimized parameters, our fabricated AWGs have up to 2.88 dB of bandwidth, with low crosstalk and low on-chip loss. With custom supporting circuit, our proposed optimized AWG can keep the comparable interrogation accuracy and resolution performance to the previous best reported AWG based FBGI system while having four-time larger measuring dynamic range of 2 nm. This paper also provides guidance for optimizing the AWG-based FBG interrogation system during the AWG designing phase.

光纤布拉格光栅或 FBG 传感器广泛应用于结构健康和温度监测领域。对紧凑型、高性能 FBG 询问器的需求日益增加。我们已经在 FBG 询问器系统应用中使用具有不同参数的 SOI 技术设计和制造了高性能阵列波导光栅或 AWG。在 AWG 设计期间影响 FBG 询问性能的关键参数进行了理论研究和实验证明。使用我们提出和优化的参数，我们制造的 AWG 具有高达 2.88 dB 的带宽、低串扰和低片上损耗。通过定制支持电路，我们提出的优化 AWG 可以保持与之前报道的最佳基于 AWG 的 FBGI 系统相当的询问精度和分辨率性能，同时具有 2 nm 的四倍大测量动态范围。本文还为在 AWG 设计阶段优化基于 AWG 的 FBG 询问系统提供了指导。