Temperature-Insensitive Refractive Index Sensor with Etched Microstructure Fiber

Temperature-Insensitive Refractive Index Sensor with Etched Microstructure Fiber

A Mach−Zehnder interferometer (MZI) based on an etched all-solid microstructure fiber (MOF) has been demonstrated. The MZI works on the basis of interference between the vibrant core and cladding modes in the MOF. The all-solid MOF has a heterostructure cladding composed of Ge-doped rod ar...

Full description

Bibliographic Details
Main Authors: Bin Dai, Xiang Shen, Xiongwei Hu, Luyun Yang, Haiqing Li, Jinggang Peng, Jinyan Li
Format: Article
Language:English
Published: MDPI AG 2019-08-01
Series:Sensors
Subjects:
optical fiber sensors
fiber optics
refractive index
microstructure fiber
Online Access:https://www.mdpi.com/1424-8220/19/17/3749
id doaj-4dc856f3498541f9b82392ef5c59d730
record_format Article
spelling doaj-4dc856f3498541f9b82392ef5c59d7302020-11-25T01:18:49ZengMDPI AGSensors1424-82202019-08-011917374910.3390/s19173749s19173749Temperature-Insensitive Refractive Index Sensor with Etched Microstructure FiberBin Dai0Xiang Shen1Xiongwei Hu2Luyun Yang3Haiqing Li4Jinggang Peng5Jinyan Li6Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, ChinaWuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, ChinaWuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, ChinaWuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, ChinaWuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, ChinaWuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, ChinaWuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, ChinaA Mach−Zehnder interferometer (MZI) based on an etched all-solid microstructure fiber (MOF) has been demonstrated. The MZI works on the basis of interference between the vibrant core and cladding modes in the MOF. The all-solid MOF has a heterostructure cladding composed of Ge-doped rod arrays and pure silica, and thus can support and propagate a vibrant cladding mode with a large mode area. When the outermost cladding of MOF is etched, the cladding mode becomes sensitive to the ambient refractive index (RI). The etched MOF can work as a sensing head for RI sensing. By comparing the interference spectra, the extinction ratio has remained stable at around 20 dB after the MOF was etched. The RI sensing characteristics of the MZI with an etched MOF have also been investigated. The results show that the RI sensitivity can reach up to 2183.6 nm/RIU with a low-temperature coefficient (<10 pm/°C).https://www.mdpi.com/1424-8220/19/17/3749optical fiber sensorsfiber opticsrefractive indexmicrostructure fiber
collection DOAJ
language English
format Article
sources DOAJ
author Bin Dai
Xiang Shen
Xiongwei Hu
Luyun Yang
Haiqing Li
Jinggang Peng
Jinyan Li
spellingShingle Bin Dai
Xiang Shen
Xiongwei Hu
Luyun Yang
Haiqing Li
Jinggang Peng
Jinyan Li
Temperature-Insensitive Refractive Index Sensor with Etched Microstructure Fiber
Sensors
optical fiber sensors
fiber optics
refractive index
microstructure fiber
author_facet Bin Dai
Xiang Shen
Xiongwei Hu
Luyun Yang
Haiqing Li
Jinggang Peng
Jinyan Li
author_sort Bin Dai
title Temperature-Insensitive Refractive Index Sensor with Etched Microstructure Fiber
title_short Temperature-Insensitive Refractive Index Sensor with Etched Microstructure Fiber
title_full Temperature-Insensitive Refractive Index Sensor with Etched Microstructure Fiber
title_fullStr Temperature-Insensitive Refractive Index Sensor with Etched Microstructure Fiber
title_full_unstemmed Temperature-Insensitive Refractive Index Sensor with Etched Microstructure Fiber
title_sort temperature-insensitive refractive index sensor with etched microstructure fiber
publisher MDPI AG
series Sensors
issn 1424-8220
publishDate 2019-08-01
description A Mach−Zehnder interferometer (MZI) based on an etched all-solid microstructure fiber (MOF) has been demonstrated. The MZI works on the basis of interference between the vibrant core and cladding modes in the MOF. The all-solid MOF has a heterostructure cladding composed of Ge-doped rod arrays and pure silica, and thus can support and propagate a vibrant cladding mode with a large mode area. When the outermost cladding of MOF is etched, the cladding mode becomes sensitive to the ambient refractive index (RI). The etched MOF can work as a sensing head for RI sensing. By comparing the interference spectra, the extinction ratio has remained stable at around 20 dB after the MOF was etched. The RI sensing characteristics of the MZI with an etched MOF have also been investigated. The results show that the RI sensitivity can reach up to 2183.6 nm/RIU with a low-temperature coefficient (<10 pm/°C).
topic optical fiber sensors
fiber optics
refractive index
microstructure fiber
url https://www.mdpi.com/1424-8220/19/17/3749
work_keys_str_mv AT bindai temperatureinsensitiverefractiveindexsensorwithetchedmicrostructurefiber
AT xiangshen temperatureinsensitiverefractiveindexsensorwithetchedmicrostructurefiber
AT xiongweihu temperatureinsensitiverefractiveindexsensorwithetchedmicrostructurefiber
AT luyunyang temperatureinsensitiverefractiveindexsensorwithetchedmicrostructurefiber
AT haiqingli temperatureinsensitiverefractiveindexsensorwithetchedmicrostructurefiber
AT jinggangpeng temperatureinsensitiverefractiveindexsensorwithetchedmicrostructurefiber
AT jinyanli temperatureinsensitiverefractiveindexsensorwithetchedmicrostructurefiber
_version_ 1725140165623545856

Similar Items