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One-wavelength fiber Bragg grating array interrogation by reflectivity division multiplexing

Madhav, KV and Yamdagni, S and Srinivas, T and Asokan, S (2008) One-wavelength fiber Bragg grating array interrogation by reflectivity division multiplexing. In: Journal of Optoelectronics and Advanced Materials, 2 (10). pp. 599-602.

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Abstract

We present a novel fiber Bragg grating array interrogation system wherein all the sensors have the same Bragg wavelength but different reflectivities. The sensor grating signals are tracked using a multiple-threshold level-crossing network consisting of reference gratings and are encoded as a series of signal pulses whose amplitudes are proportional to the reflectivity of the corresponding sensor. Demodulation is achieved by assembling the pulses by virtue of their heights and temporal order to reconstruct the signals of each sensor. The proposed reflectivity division multiplexing (RDM) method is a completely passive system that gives a direct readout of the perturbation, ideal for high-speed high-frequency real-time applications.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to National Institute of Research & Development for Optoelectronics, Romania.
Keywords: Fiber Bragg grating array;Reflectivity division multiplexing; Sensor.
Department/Centre: Division of Physical & Mathematical Sciences > Instrumentation and Applied Physics (Formally ISU)
Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 08 Sep 2009 07:33
Last Modified: 19 Sep 2010 04:57
URI: http://eprints.iisc.ernet.in/id/eprint/17526

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