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1.
Opt Lett ; 20(11): 1253-5, 1995 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-19859490

RESUMO

The spectral dependence of photoinduced optical losses after chi((2)) writing have been obtained in Sm- and Er-doped fibers. The results show that Sm(2+) and Er(2+) can be a source of photoelectrons during fiber preparation.

2.
Opt Lett ; 19(7): 439-41, 1994 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-19844333

RESUMO

Photoinduced second-harmonic generation in silica fibers doped with Er(3+), Sm(3+), and Tb(3+) has been investigated. Er(3+)-doped fibers have been found to tune a chi((2)) grating easily to the mode structure of the laser radiation, whereas Sm(3+)-doped fibers have been found to possess the greatest resistance to chi((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.

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