Temperature-compensated optical fiber sensor for volatile organic compound gas detection based on cholesteric liquid crystal

doi:10.1364/OL.427606

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	Temperature-compensated optical fiber sensor for volatile organic compound gas detection based on cholesteric liquid crystal
	J. Hu; Y. Chen; Z. Ma; L. Zeng; D. Zhou; Z. Peng; W. Sun and Y. Liu
刊名	Optics Letters
	2021
卷号	46 期号:14 页码:3324-3327
ISSN号	1469592
DOI	10.1364/OL.427606
英文摘要	External temperature variations inevitably affect the accuracy of a liquid crystal sensor. Therefore, we propose a novel temperature-compensated fiber volatile organic compound (VOC, using acetone as a model compound) gas sensor. The proposed sensor consists of a short segment of hollow-core fiber (HCF), which is spliced on a multimode fiber. Cholesteric liquid crystal (CLC) is sealed into HCF to sense the temperature, and another type of CLC is coated on the end face of HCF for VOC gas detection. The VOC gas concentration and ambient temperature can be simultaneously measured by monitoring the wavelength shifts of two Bragg reflection peaks caused by two types of CLCs. The effects of the CLC thickness on the sensitivities of temperature and acetone concentration are investigated, and optimal parameters are chosen. An optimal sensor can reach a temperature sensitivity of 2.53 nm/C and acetone concentration sensitivity of 48.46 nm L/mmol at 8-44C. In addition, temperature compensation capability, repeatability, response time, and stability are also researched. The experimental results prove this sensor has great application potential in high-precision real-time VOC gas monitoring and detection. 2021 Optical Society of America.
URL标识	查看原文
内容类型	期刊论文
源URL	[http://ir.ciomp.ac.cn/handle/181722/65683]
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	J. Hu,Y. Chen,Z. Ma,et al. Temperature-compensated optical fiber sensor for volatile organic compound gas detection based on cholesteric liquid crystal[J]. Optics Letters,2021,46(14):3324-3327.
APA	J. Hu.,Y. Chen.,Z. Ma.,L. Zeng.,D. Zhou.,...&W. Sun and Y. Liu.(2021).Temperature-compensated optical fiber sensor for volatile organic compound gas detection based on cholesteric liquid crystal.Optics Letters,46(14),3324-3327.
MLA	J. Hu,et al."Temperature-compensated optical fiber sensor for volatile organic compound gas detection based on cholesteric liquid crystal".Optics Letters 46.14(2021):3324-3327.