Pre-compressed polymer cholesteric liquid crystal based optical fiber VOC sensor with high stability and a wide detection range

Li, Yong1,2; Yin, Zhen3; Luo, Dan2

2022-08-29

10.1364/OE.470518

OPTICS EXPRESS   Impact Factor & Quartile

1094-4087

As the concentration of VOC gases is very high in organic chemical reactions, in order to ensure the safety and accuracy of the experiment, it is very important to develop a gas sensor with a wide detection range. Exploring the mechanism and law of photonic bandgap (PBG) shift after absorption of volatile organic compounds (VOCs) vapors are two basic premises of resolving the PCLC for gas detection with a wide measurement range and stability. Herein, the PCLC films doped with different concentrations of polymer are used for acetone vapor detection, and the shift law of the PBG position is analyzed. As the increase of the detected gas concentration, the intractable problem is that the PBG position of PCLC exhibits red- and blue-shifts successively. Particularly, the pre-compressed technique is highly important for development of a high-performance PCLC based fiber probe, which is crucial for effectively solving the bottleneck problem mentioned. It enables detection of a wide range of acetone vapor concentration from 0 ppm to 50x10(4) ppm, and the corresponding mean sensitivity of 0.23 pm/ppm. In addition, the thermal crosstalk is generally negligible at temperature below 40 degrees C. Therefore, it is a breakthrough that the described technique not only effectively enhances the stability and robustness of the PCLC fiber probe for VOC vapor detection, but also improves its sensitivity and detection range. The pre-compressed technique provides a novel avenue for fabrication of other PCLC-based devices. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

SCI ; EI

English

Corresponding

Shenzhen Institute of Information Technology[SZIIT2022KJ033]

Optics

Optics

WOS:000850229100105

Optica Publishing Group

20223712724208

Acetone ; Blue shift ; Chemical detection ; Cholesteric liquid crystals ; Optical fiber fabrication ; Optical fibers ; Polymer films ; Probes ; Red Shift

Light/Optics:741.1 ; Fiber Optics:741.1.2 ; Chemistry:801 ; Chemical Products Generally:804 ; Organic Compounds:804.1 ; Polymeric Materials:815.1

PHYSICS

Web of Science

1.Shenzhen Inst Informat Technol, Coll Microelect, 2188 Longxiang Ave, Shenzhen 518172, Guangdong, Peoples R China
2.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Xueyuan Rd 1088, Shenzhen 518055, Guangdong, Peoples R China
3.Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China

Li, Yong,Yin, Zhen,Luo, Dan. Pre-compressed polymer cholesteric liquid crystal based optical fiber VOC sensor with high stability and a wide detection range[J]. OPTICS EXPRESS,2022,30(18):32822-32832.

Li, Yong,Yin, Zhen,&Luo, Dan.(2022).Pre-compressed polymer cholesteric liquid crystal based optical fiber VOC sensor with high stability and a wide detection range.OPTICS EXPRESS,30(18),32822-32832.

Li, Yong,et al."Pre-compressed polymer cholesteric liquid crystal based optical fiber VOC sensor with high stability and a wide detection range".OPTICS EXPRESS 30.18(2022):32822-32832.