Amplification of high bandwidth signals through two-wave mixing in photorefractive Bi12SiO20 crystals

de Montchenault, G. Hamel; Loiseaux, B.; Huignard, J. P.
June 1987
Applied Physics Letters;6/22/1987, Vol. 50 Issue 25, p1794
Academic Journal
We report a new nearly degenerate two-wave mixing interaction in photorefractive Bi12SiO20 crystals in which the signal beam is time modulated at high frequency. The beam coupling phenomena and the time integration properties of the crystal allow us to achieve a differential gain γdiff on the transmitted signal beam. The dependence of γdiff versus the duty cycle of the modulated signal is analyzed. Amplification and regeneration of periodic, or random sequences of information bits are experimentally demonstrated.


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