Self-organized χ(2) gratings in optical fiber, prepared by irradiating the fiber with 1.06-μm light from a Q-switched mode-locked Nd:YAG laser simultaneously with its second harmonic, can be erased optically. This is accomplished by irradiating the prepared fiber with the 532-nm mode-locked Q-switched light alone, without the 1.06-μm light, or with intense green or blue light from an argon laser. The erasure is reversible, and the fiber can be reprepared as before for second-harmonic conversion. The nonexponential time dependence of the erasure process can be explained by a model involving charge separation during seeding and recombination during erasure.
© 1988 Optical Society of America
Original Manuscript: January 19, 1988
Manuscript Accepted: March 15, 1988
Published: June 1, 1988
François Ouellette, Kenneth O. Hill, and Derwyn C. Johnson, "Light-induced erasure of self-organized χ(2) gratings in optical fibers," Opt. Lett. 13, 515-517 (1988)