用于 FBG 检测系统的大带宽阵列波导光栅设计

IF 3.1 3区物理与天体物理 Q2 INSTRUMENTS & INSTRUMENTATION

Infrared Physics & Technology Pub Date : 2024-10-20 DOI:10.1016/j.infrared.2024.105599

Yiyao Yang , Pei Yuan , Ran Xu , Bingxiang Li , Lianqing Zhu

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引用次数: 0

摘要

近年来，阵列波导光栅（AWG）解调方法得到了广泛应用。然而，基于 AWG 的光纤布拉格光栅（FBG）询问系统的分辨率和总测量范围受到 AWG 输出特性的限制。我们设计并制造了一种基于二氧化硅的多通道 AWG，作为 FBG 干涉的关键部件。为了提高解调的动态范围，我们在输入波导和输入板坯波导中间引入了多模干扰耦合器（MMI）结构。从仿真结果来看，AWG 的 3-dB 带宽从 1.04 nm 增加到了 1.86 nm。我们测试了基于该 AWG 的询问系统的性能。结果表明，该系统可以在 C 波段实现连续解调，询问精度优于 20.22 pm，波长分辨率为 1 pm。

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Large bandwidth array waveguide grating design for FBG interrogation system

The array waveguide grating (AWG) demodulation method has been widely used in recent years. However, the resolution and total measurement range of AWG-based Fiber Bragg Grating (FBG) interrogation systems are limited by the output characteristics of AWGs. We designed and fabricated a multi-channel SiO₂-based AWG as a key component of FBG Interrogation. To increase the dynamic range of demodulation, a multimode interference coupler (MMI) structure is introduced in the middle of the input waveguide and the input slab waveguide. From the simulation results, the 3-dB bandwidth of the AWG is increased from 1.04 nm to 1.86 nm. We test the performance of the interrogation system based on this AWG. The results demonstrate that the system can achieve continuous demodulation in the C-band, with an interrogation accuracy better than 20.22 pm and a wavelength resolution of 1 pm.

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来源期刊

Infrared Physics & Technology 物理-光学

CiteScore

5.70

自引率

12.10%

发文量

400

审稿时长

67 days

期刊介绍： The Journal covers the entire field of infrared physics and technology: theory, experiment, application, devices and instrumentation. Infrared'' is defined as covering the near, mid and far infrared (terahertz) regions from 0.75um (750nm) to 1mm (300GHz.) Submissions in the 300GHz to 100GHz region may be accepted at the editors discretion if their content is relevant to shorter wavelengths. Submissions must be primarily concerned with and directly relevant to this spectral region. Its core topics can be summarized as the generation, propagation and detection, of infrared radiation; the associated optics, materials and devices; and its use in all fields of science, industry, engineering and medicine. Infrared techniques occur in many different fields, notably spectroscopy and interferometry; material characterization and processing; atmospheric physics, astronomy and space research. Scientific aspects include lasers, quantum optics, quantum electronics, image processing and semiconductor physics. Some important applications are medical diagnostics and treatment, industrial inspection and environmental monitoring.