Compact gas refractometer based on a tapered four-core fiber

Zhihua Shao; Xueguang Qiao; Qiangzhou Rong

doi:10.1364/AO.57.010198

Compact gas refractometer based on a tapered four-core fiber

Zhihua Shao
, Xueguang Qiao
, Qiangzhou Rong

Northwest University China

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

A compact in-line interferometer is proposed and experimentally demonstrated for gas refractive index (GRI) measurement. The sensor comprises a tapered four-core fiber (TFCF) sandwiched between two single-mode fibers (SMFs), forming an in-line SMF–TFCF–SMF structure. The fiber taper acts as a bridge between the external GRI variation and the multimode interference within the TFCF segment. A high sensitivity of 1280.94 dB/refractive index unit is obtained in GRI measurement around 1.0. Temperature change only shifts the interference wavelength, and the cross-sensitivity of temperature can be ignored by intensity demodulation. The proposed gas refractometer, with its improved performance, can be a good candidate for chemical sensing or bio-sensing.

Original language	English
Pages (from-to)	10198-10206
Number of pages	9
Journal	Applied Optics
Volume	57
Issue number	35
DOIs	https://doi.org/10.1364/AO.57.010198
State	Published - 10 Dec 2018
Externally published	Yes

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10.1364/AO.57.010198

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title = "Compact gas refractometer based on a tapered four-core fiber",

abstract = "A compact in-line interferometer is proposed and experimentally demonstrated for gas refractive index (GRI) measurement. The sensor comprises a tapered four-core fiber (TFCF) sandwiched between two single-mode fibers (SMFs), forming an in-line SMF–TFCF–SMF structure. The fiber taper acts as a bridge between the external GRI variation and the multimode interference within the TFCF segment. A high sensitivity of 1280.94 dB/refractive index unit is obtained in GRI measurement around 1.0. Temperature change only shifts the interference wavelength, and the cross-sensitivity of temperature can be ignored by intensity demodulation. The proposed gas refractometer, with its improved performance, can be a good candidate for chemical sensing or bio-sensing.",

author = "Zhihua Shao and Xueguang Qiao and Qiangzhou Rong",

note = "Publisher Copyright: {\textcopyright} 2018 Optical Society of America.",

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AU - Shao, Zhihua

AU - Qiao, Xueguang

AU - Rong, Qiangzhou

PY - 2018/12/10

Y1 - 2018/12/10

N2 - A compact in-line interferometer is proposed and experimentally demonstrated for gas refractive index (GRI) measurement. The sensor comprises a tapered four-core fiber (TFCF) sandwiched between two single-mode fibers (SMFs), forming an in-line SMF–TFCF–SMF structure. The fiber taper acts as a bridge between the external GRI variation and the multimode interference within the TFCF segment. A high sensitivity of 1280.94 dB/refractive index unit is obtained in GRI measurement around 1.0. Temperature change only shifts the interference wavelength, and the cross-sensitivity of temperature can be ignored by intensity demodulation. The proposed gas refractometer, with its improved performance, can be a good candidate for chemical sensing or bio-sensing.

AB - A compact in-line interferometer is proposed and experimentally demonstrated for gas refractive index (GRI) measurement. The sensor comprises a tapered four-core fiber (TFCF) sandwiched between two single-mode fibers (SMFs), forming an in-line SMF–TFCF–SMF structure. The fiber taper acts as a bridge between the external GRI variation and the multimode interference within the TFCF segment. A high sensitivity of 1280.94 dB/refractive index unit is obtained in GRI measurement around 1.0. Temperature change only shifts the interference wavelength, and the cross-sensitivity of temperature can be ignored by intensity demodulation. The proposed gas refractometer, with its improved performance, can be a good candidate for chemical sensing or bio-sensing.

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DO - 10.1364/AO.57.010198

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VL - 57

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JO - Applied Optics

JF - Applied Optics

IS - 35

ER -

Compact gas refractometer based on a tapered four-core fiber

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