Humidity Sensor Based on a Long-Period Fiber Grating Coated with Polymer Composite Film

Humidity Sensor Based on a Long-Period Fiber Grating Coated with Polymer Composite Film

We demonstrate a simple and highly sensitive optical fiber relative humidity (RH) sensor based on a long-period fiber grating (LPFG) coated with polyethylene glycol (PEG)/polyvinyl alcohol (PVA) composite films. The resonance wavelength of the LPFG is sensitive to environmental humidity due to the c...

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Bibliographic Details
Main Authors: Yunlong Wang, Yunqi Liu, Fang Zou, Chen Jiang, Chengbo Mou, Tingyun Wang
Format: Article
Language:English
Published: MDPI AG 2019-05-01
Series:Sensors
Subjects:
long-period fiber grating (LPFG)
polymer coating
humidity sensor
PEG
PVA
Online Access:https://www.mdpi.com/1424-8220/19/10/2263

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