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IR-poled second-harmonic generation in glass

✍ Scribed by J. Varga; Y. Szingvari; E. Ferenctchi

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
159 KB
Volume
34
Category
Article
ISSN
0030-3992

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✦ Synopsis

Infrared (IR)-induced second-harmonic generation in the chalcogenide glasses is observed. A phenomenological approach of IR picosecond non-linear optical (NLO) response in glass is developed for the middle IR spectral range (5 -15 m). The observed e ect is explained within the framework of ΓΏfth-order NLO susceptibilities. A model that reproduces the basic characteristics of the experimental data, in which the optical non-linearities caused by photoinduced electron-phonon anharmonic interactions, is proposed. The role of the IR-induced phase matching conditions in the observed phenomenon is discussed.

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