多线拟合模型在利用空芯光子带隙光纤检测 ν(2) + 2ν(3) 带中的甲烷。

Multi-Line Fit Model for the Detection of Methane at ν(2) + 2ν(3) Band using Hollow-Core Photonic Bandgap Fibres.

机构信息

Photonics Engineering Group, University of Cantabria, Avda. de los Castros S/N, 39005 Santander, Spain; E-mails:

出版信息

Sensors (Basel). 2009;9(1):490-502. doi: 10.3390/s90100490. Epub 2009 Jan 14.

DOI:10.3390/s90100490

PMID:22389612

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3280758/

Abstract

Hollow-core photonic bandgap fibres (HC-PBFs) have emerged as a novel technology in the field of gas sensing. The long interaction pathlengths achievable with these fibres are especially advantageous for the detection of weakly absorbing gases. In this work, we demonstrate the good performance of a HC-PBF in the detection of the ν(2) + 2ν(3) band of methane, at 1.3 μm. The Q-branch manifold, at 1331.55 nm, is targeted for concentration monitoring purposes. A computationally optimized multi-line model is used to fit the Q-branch. Using this model, a detection limit of 98 ppmv (parts per million by volume) is estimated.

摘要

中空芯光子带隙光纤（HC-PBFs）在气体传感领域已成为一种新兴技术。这些光纤能够实现长的相互作用路径长度，这对于检测弱吸收气体特别有利。在这项工作中，我们展示了 HC-PBF 在检测 1.3μm 处甲烷的 ν(2) + 2ν(3) 带方面的良好性能。针对浓度监测目的，选择了 1331.55nm 的 Q 支谱线。使用计算优化的多谱线模型来拟合 Q 支。使用该模型，估计检测限为 98ppmv（体积百万分率）。