Discrimination between the refractive index and temperatare by using a sandwiched structure of long-period gratings

Li Yang Shao; Aping Zhang; Jin Hua Yan; Sailing He

doi:10.1117/12.636283

Discrimination between the refractive index and temperatare by using a sandwiched structure of long-period gratings

Li Yang Shao, Aping Zhang, Jin Hua Yan, Sailing He

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

2 Citations (Scopus)

Abstract

We present a novel scheme for simultaneous measurement of the external RI and temperature by using the sandwiched long-period gratings (SLPGs). An LPG pair coupling between the guided mode and the low-order cladding mode acts a temperature reference element, and another LPG in-between coupling with the higher-order cladding mode performances an RI sensor. The period and length of the paired LPG (with a center to center distance 47.5mm) are 643 μm and 22.5mm,respectively, and those of LPG in-between are chosen to be 428 μm and 23mm, respectively. The experimental results show that the RI sensitivities of a paired LPG coupling with the third order cladding mode is -6.71 nm/R.I.U (refractive index unit), and the sensitivity of the LPG in between coupling with the ninth order cladding mode is -27.77 nm/R.I.U. The temperature sensitivities of these LPGs are -0.315nm/° C and-0.337nm/° C, respectively.

Original language	English
Article number	60191S
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	6019 I
DOIs	https://doi.org/10.1117/12.636283
Publication status	Published - 1 Dec 2005
Externally published	Yes
Event	Passive Components and Fiber-based Devices II - Shanghai, China Duration: 7 Nov 2005 → 10 Nov 2005

Keywords

Fiber optic sensors
Long-period gratings
Mech-Zehnder interferometers
Refractive-index sensor

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

More information

10.1117/12.636283

Cite this

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title = "Discrimination between the refractive index and temperatare by using a sandwiched structure of long-period gratings",

abstract = "We present a novel scheme for simultaneous measurement of the external RI and temperature by using the sandwiched long-period gratings (SLPGs). An LPG pair coupling between the guided mode and the low-order cladding mode acts a temperature reference element, and another LPG in-between coupling with the higher-order cladding mode performances an RI sensor. The period and length of the paired LPG (with a center to center distance 47.5mm) are 643 μm and 22.5mm,respectively, and those of LPG in-between are chosen to be 428 μm and 23mm, respectively. The experimental results show that the RI sensitivities of a paired LPG coupling with the third order cladding mode is -6.71 nm/R.I.U (refractive index unit), and the sensitivity of the LPG in between coupling with the ninth order cladding mode is -27.77 nm/R.I.U. The temperature sensitivities of these LPGs are -0.315nm/° C and-0.337nm/° C, respectively.",

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author = "Shao, {Li Yang} and Aping Zhang and Yan, {Jin Hua} and Sailing He",

year = "2005",

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Discrimination between the refractive index and temperatare by using a sandwiched structure of long-period gratings. / Shao, Li Yang; Zhang, Aping; Yan, Jin Hua et al.
In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 6019 I, 60191S, 01.12.2005.

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

TY - JOUR

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AU - Zhang, Aping

AU - Yan, Jin Hua

AU - He, Sailing

PY - 2005/12/1

Y1 - 2005/12/1

N2 - We present a novel scheme for simultaneous measurement of the external RI and temperature by using the sandwiched long-period gratings (SLPGs). An LPG pair coupling between the guided mode and the low-order cladding mode acts a temperature reference element, and another LPG in-between coupling with the higher-order cladding mode performances an RI sensor. The period and length of the paired LPG (with a center to center distance 47.5mm) are 643 μm and 22.5mm,respectively, and those of LPG in-between are chosen to be 428 μm and 23mm, respectively. The experimental results show that the RI sensitivities of a paired LPG coupling with the third order cladding mode is -6.71 nm/R.I.U (refractive index unit), and the sensitivity of the LPG in between coupling with the ninth order cladding mode is -27.77 nm/R.I.U. The temperature sensitivities of these LPGs are -0.315nm/° C and-0.337nm/° C, respectively.

AB - We present a novel scheme for simultaneous measurement of the external RI and temperature by using the sandwiched long-period gratings (SLPGs). An LPG pair coupling between the guided mode and the low-order cladding mode acts a temperature reference element, and another LPG in-between coupling with the higher-order cladding mode performances an RI sensor. The period and length of the paired LPG (with a center to center distance 47.5mm) are 643 μm and 22.5mm,respectively, and those of LPG in-between are chosen to be 428 μm and 23mm, respectively. The experimental results show that the RI sensitivities of a paired LPG coupling with the third order cladding mode is -6.71 nm/R.I.U (refractive index unit), and the sensitivity of the LPG in between coupling with the ninth order cladding mode is -27.77 nm/R.I.U. The temperature sensitivities of these LPGs are -0.315nm/° C and-0.337nm/° C, respectively.

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KW - Mech-Zehnder interferometers

KW - Refractive-index sensor

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JO - Proceedings of SPIE - The International Society for Optical Engineering

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Discrimination between the refractive index and temperatare by using a sandwiched structure of long-period gratings

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