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Advanced Photonics & Renewable Energy

Phase Matching and Phase Locking in Cascaded Optical Parametric Oscillator

Diana A. Antonosyan, T. V. Gevorgyan, Gagik Yu. Kryuchkyan

Published Jan 1, 2010• 0 citations
Publisher

Abstract

We consider cascaded optical parametric oscillator based on phase matched photonic processes in χ(2) superlattices. Formation of phase locked light states on the framework of Wigner functions and production of three-photon states are analyzed.
DOI
10.1364/np.2010.ntuc40

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We investigate production of three-photon and four-photon states in cascaded parametric processes of photon splitting and summing in χ (2)nonlinear media, under action of pump field. Generation of photon triplets using simultaneously phase matched three-photon processes: ω0↔ω1+ω2 , ω2↔ω1+ω1 , is considered in dual-grating layered structure that involves nonlinear and linear segments. The production of heralded two-photon entangled states from three-photon states is analyzed for this configuration by using the method of conditional detection of auxiliary photons. Cascaded four-photon downconversion based on simultaneously phase matched three-photon processes: ω0↔ω2 +ω2 , ω2↔ω1+ω1 is arranged for phase-reversed configuration. The effects of correlation between photons in both three-photon and four-photon states is analyzed in the regimes of amplification of corresponding modes at the frequency of three-photon downconversion ω1 = ω0/3 and the frequency of four-photon down-conversion ω1 = ω0/4respectively for both cascaded systems.
We analyze the dynamics, two-mode squeezing as well as Einstein–Podolsky–Rozen (EPR) correlations of the signal–idler beams in a cavity with two resonant cascaded nonlinear crystals. The subharmonic system is trifurcated and self-phase-locked, and enables the existence of stable steady bright-beam/dark-beam solutions, leading to different properties of squeezing and EPR correlations. Compared with conventional nondegenerate optical parametric oscillators, our results can be helpful to quantum information processing as well metrology.