Abstract

Photoinduced second-harmonic generation in silica fibers doped with Er³⁺, Sm³⁺, and Tb³⁺ has been investigated. Er³⁺-doped fibers have been found to tune a χ⁽²⁾ grating easily to the mode structure of the laser radiation, whereas Sm³⁺-doped fibers have been found to possess the greatest resistance to χ⁽²⁾ grating erasure by radiation at 532 nm. From the beginning of the preparation processes, the third harmonic at 355 nm is registered in all the fibers.

© 1994 Optical Society of America

Photoinduced second-harmonic generation in rare-earth-doped aluminosilicate optical fibers

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