| Autor: |
Doreen A. Weinberger, Robert W. Terhune, Avais Kamal |
| Rok vydání: |
1991 |
| Předmět: |
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| Zdroj: |
SPIE Proceedings. |
| ISSN: |
0277-786X |
| Popis: |
In this paper we report experiments on the dynamic of self-organized (chi)(2) gratings. An important observation is that the initial growth rate of (chi)(2) gratings is always linear in time. A fast transient and slow fluctuations are also observed in certain cases. The initial growth rate of the grating amplitude as a function of the irradiances of the seeding fundamental ((omega)) and second harmonic (2(omega)) beams was measured and was determined to have a power dependence on I(2(omega)) of exponent 1.48 +/- 0.2, and on I((omega)) of 0.9 +/- 0.2. A model based on selective ionization of dipolar defects due to an interference between two-photon and three-photon processes has been explored in the context of these results.© (1991) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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