Fiber laser-based temperature sensor systems using uniform wavelength-matched Bragg grating reflectors

Mandal, Jharna; Sun, Tao; Grattan, Kenneth T. V.; Augousti, A.T.

doi:10.1016/j.sna.2005.01.028

Cited by 5 publications

(3 citation statements)

References 17 publications

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“…The revolution of fiber-optic technology has dominated the development of fiber Bragg grating (FBG) for various sensor applications [1][2][3][4], besides contributing in the field of telecommunication system, with its attractive wavelength of 1550 nm. It is undeniable that the FBG has gained a wide acceptance in the sensor applications such as in structural health examining for buildings, bridges, trains and composite materials [3] due to its high sensitivity, high physical and mechanical strength, high resistance towards electromagnetic noise, compactness, easy fabrication and good restriction towards the lasing frequency [1].…”

Section: Introductionmentioning

confidence: 99%

“…Whereas the active FBG sensor composes of a gain medium, usually made up of erbium doped fiber to provide population inversion for the lasing purpose. Currently, the active FBG sensor, also known as the FBG-based fiber laser sensor is able to compensate the drawbacks of the passive FBG sensor in terms of the enhancement of the signal-to-noise ratio (SNR) and the linewidth narrowing [2]. A significant reason for the weakness of signal in the passive FBG sensor is due to the usage of the broadband light source, as its signal strength is limited by its small optical spectral density, especially in the long distance interrogation system, which consequently prohibits the detection system from obtaining a high accuracy measurement [3].…”

Section: Introductionmentioning

confidence: 99%

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High resolution interrogation system for fiber Bragg grating (FBG) sensor application using radio frequency spectrum analyser

Muhammad¹,

Zulkifli²,

Harun³

et al. 2013

AIP Conference Proceedings

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Articles you may be interested inOn the use of optical fiber Bragg grating (FBG) sensor technology for strain modal analysis AIP Conf. Abstract. In this paper, we propose a fiber Bragg grating (FBG) interrogation system for high resolution sensor application based on radio frequency (RF) generation technique by beating a single longitudinal mode (SLM) fiber ring laser with an external tunable laser source (TLS). The external TLS provides a constant wavelength (CW), functioning as the reference signal for the frequency beating technique. The TLS used has a constant output power and wavelength over time. The sensor signal is provided by the reflected wavelength of a typical fiber Bragg grating (FBG) in the SLM fiber ring laser, which consists of a 1 m long highly doped Erbium doped fiber as the gain medium. The key to ensure the SLM laser oscillation is the role of graphene as saturable absorber which is opposed to the commonly used unpumped erbiumdoped fiber and this consequently contributes to the simple and short cavity design of our proposed system. The signal from the SLM fiber ring laser, which is generated by the FBG in response to external changes, such as temperature, strain, air humidity and air movement, is heterodyned with the CW signal from the TLS at a 6 GHz photodetector using a 3-dB fused coupler to generate the frequency beating. This proposed system is experimentally demonstrated as a temperature sensor and the results shows that the frequency response of the system towards the changes in temperature is about 1.3 GHz/ o C, taking into account the resolution bandwidth of 3 MHz of the radio frequency spectrum analyzer (RFSA).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High resolution interrogation system for fiber Bragg grating (FBG) sensor application using radio frequency spectrum analyser

Muhammad¹,

Zulkifli²,

Harun³

et al. 2013

AIP Conference Proceedings

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“…Considering the harsh monitoring environment of the high-voltage electric equipment, fiber Bragg grating (FBG) sensor is a better tool to solve this problem as it has the characteristics of resistant high-voltage, anti-electromagnetic interference, insulation, and high reliability in monitoring temperature of high-voltage electric equipment through FBG sensors matrix [4][5][6][7]. As the fault of highvoltage electric equipment is complex, it is difficult to make accurate recognition; information fusion techniques can be applied to fault diagnosis.…”

Section: Introductionmentioning

confidence: 99%

High-voltage equipment condition monitoring and diagnosis system based on information fusion

Wang

Han

et al. 2009

Neural Comput & Applic

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As high-voltage electric equipment has complex structure and works in harsh environments, fiber Bragg grating (FBG) sensors are applied to realize the realtime monitoring of some parameters in which temperature is the main parameter. Using FBG sensors to monitor temperature of high-voltage electric equipment can overcome the disadvantages of harsh monitoring environment such as high-voltage, big current, strong electromagnetic interference and so on. The fault of high-voltage electric equipment is difficult to be distinguished as there may be many different reasons. The traditional or simple methods cannot totally meet the demand of fault diagnosis of highvoltage electric equipment. First, taking neural network as a classifier to distinguish different fault types from complex fault information in the feature layer can supply a good foundation to final information fusion diagnosis. Second, Dempster-Shafer evidence theory is used to make a comprehensive diagnosis of fault information in the decision layer. All the uses above can increase the speed and accuracy of diagnosis and have practical significance. The fault diagnosis system shows good results and provides an effective way to realize the real-time condition monitoring and more accurate fault diagnosis of high-voltage electric equipment.

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Food Physics

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Fiber laser-based temperature sensor systems using uniform wavelength-matched Bragg grating reflectors

Cited by 5 publications

References 17 publications

High resolution interrogation system for fiber Bragg grating (FBG) sensor application using radio frequency spectrum analyser

High resolution interrogation system for fiber Bragg grating (FBG) sensor application using radio frequency spectrum analyser

High-voltage equipment condition monitoring and diagnosis system based on information fusion

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