"

Cookies ussage consent

I agree.

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

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

K. V. MADHAV1, S. YAMDAGNI1, T. SRINIVAS2,* , S. ASOKAN1

Affiliation

  1. Department of Instrumentation, Indian Institute of Science, Bangalore 560012, India
  2. Department of Electrical Communication Engineering, Indian Institute of Science, Bangalore 560012, India

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.

Keywords

Fiber Bragg grating array, Reflectivity division multiplexing, Sensor.

Citation

K. V. MADHAV, S. YAMDAGNI, T. SRINIVAS, S. ASOKAN, One-wavelength fiber Bragg grating array interrogation by reflectivity division multiplexing, Optoelectronics and Advanced Materials - Rapid Communications, 2, 10, October 2008, pp.599-602 (2008).

Submitted at: Aug. 27, 2023

Accepted at: Oct. 2, 2008