Owl-inspired dual-ended asymmetric lithium niobate tuning fork for high-sensitivity dual-gas laser spectroscopic sensing

IF 7.1 1区物理与天体物理 Q1 OPTICS

Photonics Research Pub Date : 2026-09-30 DOI:10.1364/prj.609154

Botao Liu,Guowei Han,Ying He,Shunda Qiao,Runqiu Wang,Haiyue Sun,Yufei Ma

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引用次数: 0

Abstract

In this work, a dual-ended asymmetric lithium niobate tuning fork (DEA-LiNTF) is proposed for the first time for dual-gas laser spectroscopic sensing. Inspired by the asymmetric auditory structure of owls, the DEA-LiNTF is designed with two asymmetric sensing ends, enabling two separated high-sensitivity fundamental in-plane resonance modes within a single device. The sensing performance of the DEA-LiNTF was systematically evaluated in lithium-niobate-enhanced photoacoustic spectroscopy (LiNPAS) and light-induced thermoelastic spectroscopy (LITES) systems. In the LiNPAS system, the 2 f signal amplitudes of DEA-LiNTF Mode 1 for methane ( CH 4 ) detection and Mode 2 for acetylene (C 2 H 2 ) detection are 5.25 and 7.16 times higher than those of the standard quartz tuning fork (QTF), respectively, achieving signal-to-noise ratio (SNR)-based minimum detection limits (MDLs) of 38.7 ppm and 10.5 ppm. In the LITES system, the corresponding signal enhancement factors reach 6.85 and 8.7, with SNR-based MDLs of 894 ppb and 252 ppb for CH 4 and C 2 H 2 , respectively. Crosstalk tests further confirm that the two resonance modes can operate independently under frequency-division multiplexing. This work provides a promising strategy for compact and high-sensitivity multi-gas detection and opens a new pathway for developing integrated multi-component laser spectroscopic sensors.

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猫头鹰启发的双端不对称铌酸锂音叉，用于高灵敏度双气体激光光谱传感

本文首次提出了一种用于双气体激光光谱传感的双端不对称铌酸锂音叉（DEA-LiNTF）。受猫头鹰不对称听觉结构的启发，DEA-LiNTF设计了两个不对称传感端，在单个设备内实现两个分离的高灵敏度平面内基本共振模式。在铌酸锂增强光声光谱（LiNPAS）和光致热弹性光谱（LITES）系统中对DEA-LiNTF的传感性能进行了系统评估。在LiNPAS系统中，用于甲烷（ch4）检测的DEA-LiNTF模式1和用于乙炔（c2h2）检测的模式2的2f信号幅值分别是标准石英音叉（QTF）的5.25和7.16倍，实现了基于信噪比（SNR）的最小检出限（MDLs）分别为38.7 ppm和10.5 ppm。在LITES系统中，相应的信号增强因子达到6.85和8.7，基于信噪比的ch4和c2h2的MDLs分别为894 ppb和252 ppb。串扰测试进一步证实了两种谐振模式在分频复用下可以独立工作。该工作为紧凑、高灵敏度的多气体检测提供了一种有前景的策略，并为开发集成多组分激光光谱传感器开辟了新的途径。

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来源期刊

Photonics Research OPTICS-

CiteScore

13.60

自引率

5.30%

发文量

1325

期刊介绍： Photonics Research is a joint publishing effort of the OSA and Chinese Laser Press.It publishes fundamental and applied research progress in optics and photonics. Topics include, but are not limited to, lasers, LEDs and other light sources; fiber optics and optical communications; imaging, detectors and sensors; novel materials and engineered structures; optical data storage and displays; plasmonics; quantum optics; diffractive optics and guided optics; medical optics and biophotonics; ultraviolet and x-rays; terahertz technology.