Simultaneous spatial, time and wavelength division multiplexed in-fibre grating sensing network

• Published in: Optics communications Vol. 125; no. 1; pp. 53 - 58
• Main Authors: Rao, Y.J, Lobo Ribeiro, A.B, Jackson, D.A, Zhang, L, Bennion, I
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-04-1996; Elsevier Science
• Subjects: Applied sciences; Electronics; Exact sciences and technology; Testing, measurement, noise and reliability; Measuring instrument; Grating in fibre; Strain measurement; Wavelength division multiplexing; Optical sensor; Material testing; Experimental study; Sensor array; Optical fiber
• ISSN: 0030-4018; 1873-0310
• DOI: 10.1016/0030-4018(95)00722-9

A simultaneous spatial, time and wavelength division multiplexing topology, with combination of a tunable wavelength filter and an interferometric wavelength scanner, is proposed to interrogate a range of in-fibre Bragg grating (FBG) sensors. An eleven-element FBG sensor network based upon this topology is demonstrated for quasi-static strain sensing. Preliminary experimental results show that a strain resolution of ∼7 μϵ with a ∼30 Hz bandwidth
(∼1.3 μϵ⧸
Hz
for quasi-static strain measurement has been obtained.