An in-line in-fibre ring cavity sensor for localized multi-parameter sensing

Childs, Paul; Wong, Anthony; Leung, Ian; Peng, Gang-Ding; Liao, Yehong

doi:10.1088/0957-0233/19/6/065302

Cited by 9 publications

(3 citation statements)

References 32 publications

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“…3(c)] spectra. It should be pointed out that the broad cladding modes spectrum may contain high-frequency AC components due to the Fabry-Perot interference induced by the TFBG pair [13]. However, as will be explained later, these AC components can be readily and automatically removed by the DWT technique without altering the important spectral features.…”

Section: Experimental Setup and Signal Demodulationmentioning

confidence: 99%

Single tilted Bragg reflector fiber laser for simultaneous sensing of refractive index and temperature

Wong¹,

Chung²,

Tam³

et al. 2011

Opt. Express

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A type of fiber laser, called tilted Bragg reflector fiber laser (TBR-FL), is proposed and its application in simultaneous sensing of surrounding refractive index (SRI) and temperature is demonstrated. This FL is formed by a pair of wavelength and tilt-angle matched tilted fiber Bragg gratings (TFBGs) that acted both as a resonant cavity and sensing element. A unique spectral feature of the TBR-FL is the presence of grating tilt-induced cladding modes spectrum that does not appear in other type of FL, which provides an extra sensing mechanism. By employing a simple experimental setup with the discrete wavelet transform as the demodulation technique, simultaneously sensing of SRI and temperature are achieved by measuring and analyzing the wavelet coefficients shifts of the laser output and averaged cladding modes. 1953-1958 (1999). 12. O. Hadeler, M. Ibsen, and M. N. Zervas, "Distributed-feedback fiber laser sensor for simultaneous strain and temperature measurements operating in the radio-frequency domain," Appl. Opt. 40(19), 3169-3175 (2001 ©2011 Optical Society of America

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Section: Experimental Setup and Signal Demodulationmentioning

confidence: 99%

Single tilted Bragg reflector fiber laser for simultaneous sensing of refractive index and temperature

Wong¹,

Chung²,

Tam³

et al. 2011

Opt. Express

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“…This offers the ability to significantly expand the sensor capacity of a FBG sensor network, for example a WDM sensor network that only has enough available spectrum in the C band to support 8 sensors can be extended to a 64-sensor network multiplexed with 8 WDM channels and 8 W * DM channels. This form of SCM has been applied to various sensor types, from FBG interferometers and FP sensors to concatenated [24] and selfinterfering [25] long period gratings (LPGs) and blazed FBG interferometers [26].…”

Section: Wavelength-frequency Division Multiplexing (W * Dm)mentioning

confidence: 99%

A review of spectrally coded multiplexing techniques for fibre grating sensor systems

Childs¹,

Wong²,

Yan³

et al. 2010

Meas. Sci. Technol.

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“…This offers the ability to significantly expand the sensor capacity of a FBG sensor network, for example an 8 sensor network multiplexed with WDM can be extended to a 64 sensor network multiplexed with 8 WDM channels and 8 W*DM channels [11]. This form of multiplexing has been applied to various sensor types, from FBGs, FP sensors to concatenated and self-interfering long period gratings (LPGs) [16] and blazed FBGs [17].…”

Section: Wavelength-frequency-division Multiplexing (W*dm)mentioning

confidence: 99%