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Radiophysics and Quantum Electronics

Amplification of a modulated light signal

Evald E. Fradkin, Z. K. Yankauskas

Published Feb 1, 1968• 0 citations
Publisher
DOI
10.1007/bf01089358

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Based on Kukhtarev's equations, we derive the formulae of intensity-coupling coefficient, the phase-coupling coefficient and the group velocity at large modulation depth. It is theoretically shown that the signal beam can be amplified after passing through the photorefractive crystal and the group velocity reduced to m/s, even cm/s. Meanwhile, we also analyse the influence of the thermal excitation rate and the large signal effects on optical amplification and reduction of light propagation in photorefractive two-wave mixing.