2-PHOTON-RESONANT PHOTOINDUCED 2ND-HARMONIC GENERATION IN ER3-DOPED GERMANO-ALUMINOSILICATE OPTICAL FIBERS PUMPED AT 1.319-MU-M()

Authors
HICKMANN JM GOUVEIA EA GOUVEIANETO AS DINI DC CELASCHI S
Citation
Jm. Hickmann et al., 2-PHOTON-RESONANT PHOTOINDUCED 2ND-HARMONIC GENERATION IN ER3-DOPED GERMANO-ALUMINOSILICATE OPTICAL FIBERS PUMPED AT 1.319-MU-M(), Optics letters, 19(21), 1994, pp. 1726-1728
Citations number
17
Categorie Soggetti
Optics
Journal title
Optics letters → ACNP
ISSN journal
01469592
Volume
19
Issue
21
Year of publication
1994
Pages
1726 - 1728
Database
ISI
SICI code
0146-9592(1994)19:21<1726:2P2GIE>2.0.ZU;2-Z
Abstract
The growth of a two-photon-resonant photoinduced second-harmonic signa l at 660 nm in Er3+-doped GeO2-Al2O3SiO2 single-mode optical fibers pu mped by a Nd:YAG laser at 1.319 mu m is reported. Defect states in the band gap are optically excited through a resonant two-photon absorpti on process connecting the I-4(15/2)-F-4(9/2) energy levels of the erbi um ions present in the fiber core. As a result a periodic chi((2)) gra ting is formed, and efficient second-harmonic generation takes place. For erbium-free GeO2-doped silica test fibers no second-harmonic signa l has been detected, even after hours of seeded preparation process.