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25 January 2012 Down-conversion in the nonlinear annular periodically poled media
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Proceedings Volume 8414, Photonics and Micro- and Nano-structured Materials 2011; 84140R (2012)
Event: Photonics and Micro- and Nano- structured Materials 2011, 2011, Yerevan, Armenia
In the article it is considered generation of the down-conversion process, which crucially depends on the phase-matching relations between the interacting waves, in geometry of the transverse excitation of an annular periodically poled nonlinear photonic structure by a fundamental Gaussian beam. It has been investigated the probability and conditions for quasi-phase-matching (QPM) of down-conversion process in annular periodically poled media. Here it is presented in transverse geometry of light propagation, when the fundamental light beam propagates along the axis of the structure; consequently conical beams are formed as a result of the higher-order nonlinear Bragg diffraction. It has been shown strong correlation between the interacting beams polarizations and the type of the nonlinear media for realization of perfect QPM for the process. Besides, it has been calculated the two-photon amplitude of the down-conversion process in the annular nonlinear structure.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
D. A. Antonosyan "Down-conversion in the nonlinear annular periodically poled media", Proc. SPIE 8414, Photonics and Micro- and Nano-structured Materials 2011, 84140R (25 January 2012);

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