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Collinear nearly degenerate four-wave mixing in intracavity amplifying media

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2 Author(s)
H. Nakajima ; Department of Electronics and Physics, Ecole Nationale Supérieure des Télécommunications, Paris, France ; R. Frey

Intracavity nearly degenerate four-wave mixing in amplifying media has been demonstrated to be a powerful technique to get very high conjugated reflectivities. A physical interpretation of this process is given in terms of interactions among pump (ω), probe ( \omega - \delta \omega ), or conjugated ( \omega + \delta \omega ) waves with optically induced refractive index modulations or gratings. Mixing experiments performed at the milliwatt level inside a (GaAl)As semiconductor laser operating above or below threshold have demonstrated very high conjugated reflectivities (a factor of 103-104) together with a 10 percent energy conversion efficiency. The appearance of additional peaks related to the ac Stark effect and observation of bistability on probe and conjugated beams also make this mixing process interesting for the study of instabilities occurring in lasers.

Published in:

IEEE Journal of Quantum Electronics  (Volume:22 ,  Issue: 8 )