A long-cavity, passively mode-locked erbium fiber laser operated in the square-pulse regime is demonstrated as a useful light source for interrogating fiber Bragg grating arrays. Output pulses with 4-W peak-power, 10-ns pulse widths, and bandwidths greater than 60nm were used successfully to interrogate 2% fiber Bragg gratings.
© 1998 Optical Society of America
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(140.3510) Lasers and laser optics : Lasers, fiber
(140.4050) Lasers and laser optics : Mode-locked lasers
(230.1480) Optical devices : Bragg reflectors
M. A. Putnam, M. L. Dennis, I. N. Duling III, C. G. Askins, and E. J. Friebele, "Broadband square-pulse operation of a passively mode-locked fiber laser for fiber Bragg grating interrogation," Opt. Lett. 23, 138-140 (1998)