Spatial structures in optical parametric amplification
- 1 August 1999
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 60 (2), 1626-1635
- https://doi.org/10.1103/physreva.60.1626
Abstract
We analyze the spatial aspects of the down-converted field emitted by a cavityless optical parametric amplifier, both from theoretical/numerical and experimental viewpoints. Our model neglects pump depletion and includes a classical description of the noise which initiates the process. The ringshaped angular distribution in the far field is determined basically by the phase-matching conditions. In the near field, the configuration arises from the superposition of contributions from a broad frequency band; it is shown that the finite duration of the pump pulse introduces a correlation among neighboring frequencies that allows for the appearance of a spotlike spatial modulation. When the spatial configuration of the pump field is changed from a plane wave to a narrow Gaussian, the near-field pattern assumes the form of a roll structure. The experimental observations obtained with a lithium triborate crystal agree qualitatively well with the theoretical picture.Keywords
This publication has 22 references indexed in Scilit:
- From quantum to classical imagesOptics Express, 1997
- Transverse patterns in degenerate optical parametric oscillation and degenerate four-wave mixingPhysical Review A, 1996
- Numerical simulations of interaction of bright spatial solitons in medium with saturable nonlinearityChaos, Solitons, and Fractals, 1994
- Polarized optical vortex solitons: Instabilities and dynamics in Kerr nonlinear mediaChaos, Solitons, and Fractals, 1994
- Dynamics of dark solitonsChaos, Solitons, and Fractals, 1994
- Polarization instability, multistability and transverse localized structures in Kerr mediaChaos, Solitons, and Fractals, 1994
- Transverse nonlinear optics: Introduction and reviewChaos, Solitons, and Fractals, 1994
- Formation and evolution of roll patterns in optical parametric oscillatorsPhysical Review A, 1994
- Spatio-temporal structures. Part II. Vortices and defects in lasersPhysics Reports, 1992
- Spatio-temporal structures. Part IPhysics Reports, 1992