In-fiber bragg grating sensors using interferometric interrogations for passive quadrature signal processing

Yu Lung Lo

doi:10.1109/68.681298

In-fiber bragg grating sensors using interferometric interrogations for passive quadrature signal processing

Yu Lung Lo

Department of Mechanical Engineering

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

30 Citations (Scopus)

Abstract

This letter describes a simple optically passive detection scheme for Bragg grating sensors. This detection scheme is based on two cavity lengths in Fabry-Perot read-out interferometers to produce two quadrature phase shifted signals from the Bragg grating sensor. Using the amplified spontaneous emission from an erbium-doped fiber amplifier as a low-coherence and high-power broad-band source, the passive detection technique is demonstrated by the use of Bragg grating sensors in dynamic strain measurements. This scheme is capable of measuring dynamic strain with a resolution of 0.1 μ∈/√Hz root mean square at a frequency of 500 Hz for 600 μm cavity length in the Fabry-Perot read-out system.

Original language	English
Pages (from-to)	1003-1005
Number of pages	3
Journal	IEEE Photonics Technology Letters
Volume	10
Issue number	7
DOIs	https://doi.org/10.1109/68.681298
Publication status	Published - 1998 Jul

All Science Journal Classification (ASJC) codes

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

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10.1109/68.681298

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abstract = "This letter describes a simple optically passive detection scheme for Bragg grating sensors. This detection scheme is based on two cavity lengths in Fabry-Perot read-out interferometers to produce two quadrature phase shifted signals from the Bragg grating sensor. Using the amplified spontaneous emission from an erbium-doped fiber amplifier as a low-coherence and high-power broad-band source, the passive detection technique is demonstrated by the use of Bragg grating sensors in dynamic strain measurements. This scheme is capable of measuring dynamic strain with a resolution of 0.1 μ∈/√Hz root mean square at a frequency of 500 Hz for 600 μm cavity length in the Fabry-Perot read-out system.",

author = "Lo, {Yu Lung}",

note = "Funding Information: Manuscript received December 8, 1997; revised March 19, 1998. This work was supported in part by the National Science Council to the National Cheng Kung University under Grant NSC 87-2212-E-006-048. The author is with the Department of Mechanical Engineering, The National Cheng Kung University, Tainan, Taiwan, R.O.C. Publisher Item Identifier S 1041-1135(98)04723-5.",

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N1 - Funding Information: Manuscript received December 8, 1997; revised March 19, 1998. This work was supported in part by the National Science Council to the National Cheng Kung University under Grant NSC 87-2212-E-006-048. The author is with the Department of Mechanical Engineering, The National Cheng Kung University, Tainan, Taiwan, R.O.C. Publisher Item Identifier S 1041-1135(98)04723-5.

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N2 - This letter describes a simple optically passive detection scheme for Bragg grating sensors. This detection scheme is based on two cavity lengths in Fabry-Perot read-out interferometers to produce two quadrature phase shifted signals from the Bragg grating sensor. Using the amplified spontaneous emission from an erbium-doped fiber amplifier as a low-coherence and high-power broad-band source, the passive detection technique is demonstrated by the use of Bragg grating sensors in dynamic strain measurements. This scheme is capable of measuring dynamic strain with a resolution of 0.1 μ∈/√Hz root mean square at a frequency of 500 Hz for 600 μm cavity length in the Fabry-Perot read-out system.

AB - This letter describes a simple optically passive detection scheme for Bragg grating sensors. This detection scheme is based on two cavity lengths in Fabry-Perot read-out interferometers to produce two quadrature phase shifted signals from the Bragg grating sensor. Using the amplified spontaneous emission from an erbium-doped fiber amplifier as a low-coherence and high-power broad-band source, the passive detection technique is demonstrated by the use of Bragg grating sensors in dynamic strain measurements. This scheme is capable of measuring dynamic strain with a resolution of 0.1 μ∈/√Hz root mean square at a frequency of 500 Hz for 600 μm cavity length in the Fabry-Perot read-out system.

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In-fiber bragg grating sensors using interferometric interrogations for passive quadrature signal processing

Abstract

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