Sandwiched long-period gratings for simultaneous measurement of refractive index and temperature

Aping Zhang; Li Yang Shao; Jin Fei Ding; Sailing He

doi:10.1109/LPT.2005.857621

Sandwiched long-period gratings for simultaneous measurement of refractive index and temperature

Aping Zhang, Li Yang Shao, Jin Fei Ding, Sailing He

Research output: Journal article publication › Journal article › Academic research › peer-review

117 Citations (Scopus)

Abstract

A simultaneous measurement of external refractive-index (RI) and temperature is presented by using a sandwiched structure of long-period gratings (LPGs). An LPG pair with codirectional coupling between the guided mode and a low-order cladding mode acts as a temperature sensor with low RI sensitivity, whereas another in-between LPG which couples the guided mode with a higher order cladding mode performs as an RI sensing element. The experimental results show such an all-LPG structure is not only suitable for use as a compact temperature-compensated RI sensor, but also convenient for fabrication.

Original language	English
Pages (from-to)	2397-2399
Number of pages	3
Journal	IEEE Photonics Technology Letters
Volume	17
Issue number	11
DOIs	https://doi.org/10.1109/LPT.2005.857621
Publication status	Published - 1 Nov 2005
Externally published	Yes

Keywords

Long-period fiber gratings
Optical fiber sensor
Refractive-index (RI) measurement
Temperature sensor

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

More information

10.1109/LPT.2005.857621

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abstract = "A simultaneous measurement of external refractive-index (RI) and temperature is presented by using a sandwiched structure of long-period gratings (LPGs). An LPG pair with codirectional coupling between the guided mode and a low-order cladding mode acts as a temperature sensor with low RI sensitivity, whereas another in-between LPG which couples the guided mode with a higher order cladding mode performs as an RI sensing element. The experimental results show such an all-LPG structure is not only suitable for use as a compact temperature-compensated RI sensor, but also convenient for fabrication.",

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AU - Shao, Li Yang

AU - Ding, Jin Fei

AU - He, Sailing

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AB - A simultaneous measurement of external refractive-index (RI) and temperature is presented by using a sandwiched structure of long-period gratings (LPGs). An LPG pair with codirectional coupling between the guided mode and a low-order cladding mode acts as a temperature sensor with low RI sensitivity, whereas another in-between LPG which couples the guided mode with a higher order cladding mode performs as an RI sensing element. The experimental results show such an all-LPG structure is not only suitable for use as a compact temperature-compensated RI sensor, but also convenient for fabrication.

KW - Long-period fiber gratings

KW - Optical fiber sensor

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Sandwiched long-period gratings for simultaneous measurement of refractive index and temperature

Abstract

Keywords

ASJC Scopus subject areas

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