Title :
Fiber Bragg grating array sensor system using a bandpass wavelength division multiplexer and interferometric detection
Author :
Berkoff, T.A. ; Kersey, A.D.
Author_Institution :
SFA Inc., Landover, MD, USA
Abstract :
A multiplexing approach for high-resolution sensing with Bragg gatings is described. The scheme uses a band-pass wavelength division multiplexer to separate the returned wavelengths from an array of gratings, and interferometric processing to attain high-strain resolution. A strain resolution of 1.5 nanostrain//spl radic/Hz is demonstrated, with a sensor bandwidth of 10 Hz-2 kHz for four sensors.
Keywords :
diffraction gratings; fibre optic sensors; light interferometry; optical resolving power; wavelength division multiplexing; band-pass wavelength division multiplexer; bandpass wavelength division multiplexer; fiber Bragg grating array sensor system; high-resolution sensing; high-strain resolution; interferometric detection; interferometric processing; multiplexing approach; nanostrain; returned wavelengths; sensor bandwidth; Bragg gratings; Capacitive sensors; Fiber gratings; Optical fiber sensors; Optical interferometry; Optical sensors; Sensor arrays; Sensor systems; WDM networks; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
