Multiorder nonlinear diffraction in frequency doubling processes
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Updated: Jun 24, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Solomon M Saltiel1, Dragomir N Neshev, Wieslaw Krolikowski
1Nonlinear Physics Centre, CUDOS, Research School of Physics and Engineering, The Australian National University, Canberra ACT, Australia. saltiel@phys.uni-sofia.bg
Abstract:
We analyze experimentally light scattering from chi(2) nonlinear gratings and observe two types of second-harmonic frequency-scattering processes. The first process is identified as Raman-Nath type nonlinear diffraction that is explained by applying only transverse phase-matching conditions. The angular position of this type of diffraction is defined by the ratio of the second-harmonic wavelength and the grating period. In contrast, the second type of nonlinear scattering process is explained by the longitudinal phase matching only, being insensitive to the nonlinear grating period.
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