We describe long-period grating inscription in hydrogenated telecom fibers by use of high-intensity femtosecond 352 nm laser pulses. We show that this technique allows us to fabricate high-quality 30 dB gratings of 300 µm period and 2 cm length by use of a three-photon absorption mechanism.
© 2005 Optical Society of America
Fiber Optics and Optical Communications
Mykhaylo Dubov, Ian Bennion, Stephen A. Slattery, and David N. Nikogosyan, "Strong long-period fiber gratings recorded at 352 nm," Opt. Lett. 30, 2533-2535 (2005)