Proposal and theoretical analysis of a fiber grating sensor interrogation based on dispersive Fourier transformation and a pair of chirped fiber gratings

In this paper, a novel strain sensor based on chirped fiber grating with temperature compensation is presented. The proposed strain sensor uses double chirped fiber gratings. The temperature compensation exploit the principle that the wavelength shifts of these two chirped fiber gratings induced by temperature is consistent. This strain sensor is demodulated by the light intensity detection with low cost. Furthermore, the strain sensor is simulated in the end of this paper.

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Theoretical analysis of dual-mode long period fiber grating sensor based on dual-peak resonance for dual-parameter measurement

OSA Continuum ◽

10.1364/osac.403436 ◽

2020 ◽

Author(s):

qiang ling ◽

Zhengtian Gu ◽

qi Guan

Keyword(s):

Theoretical Analysis ◽

Parameter Measurement ◽

Fiber Grating ◽

Dual Mode ◽

Long Period Fiber Grating ◽

Long Period ◽

Fiber Grating Sensor ◽

Period Fiber Grating

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Development of a Long Period Fiber Grating Interrogation System Using a Multimode Laser Diode

Sensors ◽

10.3390/s21030749 ◽

2021 ◽

Vol 21 (3) ◽

pp. 749

Author(s):

Luís Henrique Silva ◽

Paulo Santos ◽

Luís C. C. Coelho ◽

Pedro Jorge ◽

José Manuel Baptista

Keyword(s):

Laser Diode ◽

Measurement Errors ◽

Laser Scanning ◽

Fiber Grating ◽

Light Sources ◽

Fiber Gratings ◽

Multimode Laser ◽

Central Wavelength ◽

Long Period ◽

Multimode Laser Diode

Optical fiber gratings have long shown their sensing capabilities. One of the main challenges, however, is the interrogation method applied, since typical systems tend to use broadband light sources with optical spectrum analyzers, laser scanning units or CCD (Charged Coupled Device) spectrometers. The following paper presents the development of an interrogation system, which explores the temperature response of a multimode laser diode, in order to interrogate long period fiber gratings. By performing a spectral sweep along one of its rejection bands, a discrete attenuation spectrum is created. Through a curve fitting technique, the original spectrum is restored. The built unit, while presenting a substantially reduced cost compared with typical interrogation systems, is capable of interrogating along a 10 nm window with measurement errors reaching minimum values as low as 0.4 nm, regarding the grating central wavelength, and 0.4 dB for its attenuation. Given its low cost and reduced dimensions, the developed system shows potential for slow-changing field applications.

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Fiber Grating Sensor with Enhanced Pressure and Temperature Sensitivity

Chinese Physics Letters ◽

10.1088/0256-307x/17/2/014 ◽

2000 ◽

Vol 17 (2) ◽

pp. 115-116 ◽

Cited By ~ 5

Author(s):

Yun-Qi Liu ◽

Zhuan-Yun Guo ◽

Zhi-Guo Liu ◽

Dong-Hui Zhao ◽

Chun-Feng Ge ◽

...

Keyword(s):

Temperature Sensitivity ◽

Fiber Grating ◽

Fiber Grating Sensor

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A Multiple Fiber Grating Sensor System Using Code Division Multiple Access

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.765-767.2444 ◽

2013 ◽

Vol 765-767 ◽

pp. 2444-2447 ◽

Cited By ~ 1

Author(s):

Wei Li ◽

Yong Jia Zhang ◽

Hong Qiao Wen

Keyword(s):

Optical Fiber ◽

Fiber Bragg Grating ◽

Code Division Multiple Access ◽

Multiple Access ◽

Simulation Experiment ◽

Fiber Grating ◽

Sensing System ◽

Fiber Grating Sensor ◽

Fbg Sensors ◽

Code Division Multiple

In order to increase the multiplying density of Fiber Bragg Grating (FBG) sensors, a novel FBG Sensing System based on CDMA technology has been developed. Simulation experiment indicates the CDMA technology combine with optical fiber grating sensing system together successfully. Furthermore, the system can distinguishes the FBG and enhance the FBG network band utilization.

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