Fiber-laser-based wavelength-division multiplexed fiber Bragg grating sensor system

Yu, Yanguang; Lui, L.F.K.; Tam, Hwa Yaw; Chung, W.H.

doi:10.1109/68.930420

Cited by 65 publications

(16 citation statements)

References 8 publications

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“…At present, the methods of FBG wavelength demodulating in common use are tunable laser scanning [3] , non-equilibrium Mach-Zehnder interferometer [4] , matching grating filter [5] and tunable Fabry-Perot filter [6,7] . Compared with other demodulation methods, tunable Fabry-Perot filter method can convert the wavelength signal to electrical signal directly, and have some characteristics, such as simple processing, small size, high sensitivity and high utilization of optical energy, while the FED 120 jU0…”

Section: Wavelength Demodulation Arithmeticmentioning

confidence: 99%

Smart textile sensing system for human respiration monitoring based on fiber Bragg grating

Zhang

Miao

et al. 2009

SPIE Proceedings

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Magnetic resonance imaging (MRI) has become an indispensable aid to diagnosis and treatment. As the doctor cannot accompany the patient, it is essential that the patient be monitored remotely to avoid the risk of respiration being impaired by anesthetic drugs or upper airway obstruction. A smart wearable textile sensing system is described in this paper. A fiber Bragg grating (FBG) with polymer encapsulation has been woven into an elastic bandage to detect the respiration motion. According to the strain principle of FBG, the breathing rate and intensity can be obtained by measuring the variety of FBG reflected wavelength. In order to eliminate the temperature cross-sensitivity, a FBG temperature sensor has also been woven into the bandage to achieve the temperature compensation computing. Based on the tunable Fabry-Perot filter wavelength demodulated theory, wavelength measuring method and data processing arithmetic have been presented, and the system with ARM microprocessor has been designed to process and display the breathing information. The experiments to the system have proved that the wavelength measuring range is about 40nm, the resolution of wavelength can arrive at 2pm, and the sampling rate is 5Hz.

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Section: Wavelength Demodulation Arithmeticmentioning

confidence: 99%

Smart textile sensing system for human respiration monitoring based on fiber Bragg grating

Zhang

Miao

et al. 2009

SPIE Proceedings

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“…Fiber Bragg gratings (FBG) have been identified as important sensing elements [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34]. Multiplexing is one of the key features of an FBG sensor system.…”

Section: Introductionmentioning

confidence: 99%

Cable television monitoring system based on fiber laser and FBG sensor

Peng

Huang

et al. 2015

SPIE Proceedings

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We propose and experimentally demonstrate a cable television monitoring system based on a linear-cavity fiber laser and fiber Bragg grating (FBG) sensors. The linear-cavity fiber laser comprises a hybrid amplifier with an erbium-doped fiber amplifier and a semiconductor optical amplifier, a fiber loop mirror with a polarization controller and an optical coupler as a cavity mirror, and the FBG sensors acting as another cavity mirrors. Experimental results showed the feasibility of the monitoring system with sufficient of signal-to-noise ratio over 30 dB and stable output power, and the link of cable television signals on fiber link can monitored in real time. Excellent performances of carrier-to-noise ratio after longdistance transmission are obtained for cable television applications.

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“…1 Unlike many other sensors, FBG sensors can measure various parameters such as temperature, strain, pressure, displacement, and so on, with relative facility by merely detecting changes in the reflected wavelength. [9][10][11][12][13][14][15] A sensing system based on WDM technology is the most mature method. A superiority of FBG sensors over other transducers is their multiplexing capability to construct a distributed sensing network.…”

Section: Introductionmentioning

confidence: 99%

Fiber Bragg gratings sensing network with a bus chain typology structure

et al. 2016

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A fiber Bragg grating (FBG) sensing network with a bus chain typology structure based on time-division multiplexing (TDM) technology has been developed. Each FBG sensor was placed in an isolated branching circuit separated by an optical splitter. By doing this, multiple reflection and spectrum shadow, which are common in a traditional TDM network, were eliminated since incident light reflected by each sensor did not go through the other sensors. Interference among different FBGs was also avoided. The system was experimentally verified by constructing such a network with 17 FBGs involved. Wavelength and position interrogation were successfully realized. Temperature experiment was carried out on four of the FBGs and the sensitivity was 9. 87, 9.92, 9.91, and 9.97 pm∕°C, respectively. The durability, reliability, and measuring accuracy of the sensing network were effectively improved due to the bus chain typology structure.

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Fiber-laser-based wavelength-division multiplexed fiber Bragg grating sensor system

Cited by 65 publications

References 8 publications

Smart textile sensing system for human respiration monitoring based on fiber Bragg grating

Smart textile sensing system for human respiration monitoring based on fiber Bragg grating

Cable television monitoring system based on fiber laser and FBG sensor

Fiber Bragg gratings sensing network with a bus chain typology structure

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