A quadrature sampling technique is proposed for fiber Bragg grating sensor demodulation. By using zero-crossing triggers of a double-pass Mach-Zehnder interferometer, a phase variation which is linear against Bragg wavelength variation could be extracted.
© 2006 Institute of Electronics, Information and Communication Engineers
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.5060) Fiber optics and optical communications : Phase modulation
H. Park and M. Song, "A Quadrature Sampling Technique Using Double-Pass Mach-Zehnder Interferometer," in Optical Fiber Sensors, OSA Technical Digest (CD) (Optical Society of America, 2006), paper ThE21.