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微纤维 evanescent-field光热气体检测使用声学诱导模式依赖的频率转移

Yi Zhu¹, Anbo Guo¹, Jiangtao Xu¹

¹The Key Lab of Specialty Fiber Optics and Optical Access Network, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai University, Shanghai 200444, China.

Nanophotonics (Berlin, Germany)

|December 5, 2024

概括

这项研究证明了使用全光纤MHz频率转移的微纤维光热气体检测. 该系统实现了对氨检测的高灵敏度和快速响应,从而实现了先进的光纤传感应用.

科学领域:

光子学和光学传感器
光纤技术光纤技术的应用.
气体光谱学气体光谱学

背景情况:

发光场光热气体检测提供高灵敏度.
全纤维频率转移对于先进的干扰计系统至关重要.
少数模式纤维使频率操纵的模式转换成为可能.

研究的目的:

为了实验证明微纤维 evanescent-field光热气体检测.
为增强检测开发全光纤MHz级频率转移方案.
实施一个紧而灵敏的全纤维异体干扰测量系统.

主要方法:

在MHz频率转移 (0.9和1.83MHz) 的几个模式光纤中利用声光相互作用.
实施高侧带排斥 (>40 dB) 和低插入损失 (<1 dB) 的全纤维频率转换器.
采用1μm微纤维的探头配置,通过 evanescent 场调制检测光热气体.

主要成果:

氨的检测极限为32ppm (1σ),反应时间快22μs.
在48个周期内显示出低不稳定性 (0.24%).
验证了MHz级频率转移方案在异质干扰计设置中的有效性.

结论:

开发的全纤维光热气体检测系统提供高灵敏度和快速响应.
在先进的光纤传感中,MHz级频率转移技术是有效的.
这项技术有望用于异质子检测,光纤传感器和连贯通信的应用.

关键词:

声学诱导的取决于模式的频率转移.微纤维 evanescent 领域的时间.光热异质气体检测仪光热异质气体检测仪横向模式循环转换循环转换

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