Multiplexing fiber bragg grating sensors

Morey, W. W.; Dunphy, James R.; Meltz, G.

doi:10.1080/01468039108201715

Cited by 92 publications

(45 citation statements)

References 8 publications

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“…This provides grating based sensors with an inherent self-referencing capability. Furthermore, the wavelengthencoded nature of the output also facilitates wavelength division multiplexing [119] by assigning each sensor to a different slice of the available source spectrum. This allows the distributed sensing of strain (or temperature).…”

mentioning

confidence: 99%

A Review of Recent Developments in Fiber Optic Sensor Technology

Kersey

1996

Optical Fiber Technology

400

214

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mentioning

confidence: 99%

A Review of Recent Developments in Fiber Optic Sensor Technology

Kersey

1996

Optical Fiber Technology

400

214

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“…[1][2][3] Thus it can be thought that FBG sensor systems are successful enough in fiber sensors. However, the conventional FBG sensors belong to passive fiber sensors.…”

Section: Introductionmentioning

confidence: 98%

Multilongitudinal mode fiber-ring laser sensor for strain measurement

Liu

Gao

et al. 2011

Opt. Eng

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A multilongitudinal mode fiber ring laser sensor is proposed and experimentally demonstrated by measuring the strain applied on the laser sensor head. The ring cavity of the laser is formed by a 3-dB coupler, a section of erbium-doped fiber, and one fiber Bragg grating. Photonic generation of beat signals and strain measurement theory are discussed in detail. The strain applied on the fiber ring cavity is obtained by measuring the beat frequency shift. The selection way of the optimal beat signal for strain measurement is obtained by experimental research and discussion. The root-mean-square deviation of the strain and the response of beat frequency to the strain are 2.7 με and 1.5 kHz/με at 1993 MHz, respectively. The proposed sensor scheme offers a cost-effective and high-stability device for strain measurement. C 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).

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“…For a calibrated sensor, this spectral shift can be employed to measure the magnitude of the applied strain. The advantage of using Bragg gratings is that a number of such devices can be wavelength-division multiplexed on a single fiber to yield a network of distributed sensors [5]. This reduces the cost per channel and results in real-time absolute measurements throughout the lifetime of the host material or structure.…”

Section: Introductionmentioning

confidence: 98%

<title>Grating-based optical fiber sensors for structual analysis</title>

et al. 1997

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Long-period gratings have recently gained popularity as versatile optical fiber sensing elements that are simple and economical to fabricate and demodulate. Long-period gratings are periodic photoinduced structures in fiber cores that couple light from guided to cladding modes. We discuss the applications of these devices to strain measurements in high-performance materials and structures. Experimental results from a preliminary loading test carried out on a reinforcingbar commonly used in civil structures are presented. The temperature cross-sensitivity of longperiod grating-based strain sensors is analyzed and two methods to overcome this limitation are presented. We also demonstrate that strain-insensitive long-period gratings can be fabricated in standard optical fibers. The application of such gratings to temperature measurements in the presence of actively varying axial strain is discussed. Preliminary results indicate that longperiod gratings hold tremendous potential for health monitoring of advanced materials and structures.

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Multiplexing fiber bragg grating sensors

Cited by 92 publications

References 8 publications

A Review of Recent Developments in Fiber Optic Sensor Technology

A Review of Recent Developments in Fiber Optic Sensor Technology

Multilongitudinal mode fiber-ring laser sensor for strain measurement

<title>Grating-based optical fiber sensors for structual analysis</title>

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