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Czechoslovak Journal of Physics

Nondegenerate two-photon down conversion: Coherent inputs and nonclassical effects

G. Drobný, Igor Jex

Published Sep 1, 1994• 4 citations
Publisher
DOI
10.1007/bf01787791

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In the framework of Hamiltonian formalism nonclassical effects of an optical field propagating inside a directional coupler containing nondegenerate parametric amplification have been studied. We investigate the effect of switching between the input modes and the out going fields from the coupler. Particular attention has been paid to two mode squeezing, second-order correlation function, quasiprobability distribution functions, and photon-number distribution. Incident number and coherent states are considered. It has been shown that when one of the modes enters the coupler in the Fock state and the other modes are in vacuum states, the coupler can serve as a generator for coherent state. Furthermore, regimes for generation and transmission of squeezed and/or sub-Poissonian light are found.