INTERROGATION OF FIBER GRATING SENSOR ARRAYS WITH A WAVELENGTH-SWEPT FIBER LASER

We demonstrate a novel application of a wavelength-swept fiber laser t o fiber Bragg grating sensor-array interrogation. The laser provides h igh signal powers of >3 mW with <0.1-nm spectral resolution over a 28- nm wavelength span. Using time-interval counting, we demonstrate stati c-dynamic strain measurements with a resolution of 0.47 mu epsilon rms at a sampling rate of 250 Hz. (C) 1998 Optical Society of America.