Journal
OPTICS LETTERS
Volume 39, Issue 14, Pages 4231-4234Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.39.004231
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Funding
- Russian Federation [MK-250.2013.2]
- Krasnoyarsk Regional Fund for Science and Technical Activity Support
- RAS grant [24.31]
- Ural Federal University Development Program
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We study the nonlinear Raman-Nath diffraction (NRND) of femtosecond laser pulses in a 1D periodic nonlinear photonic structure. The calculated second-harmonic spectra represent frequency combs for different orders of transverse phase matching. These frequency combs are in close analogy with the well-known spectral Maker fringes observed in single crystals. The spectral intensity of the second harmonic experiences a redshift with a propagation angle, which is opposite the case of Cerenkov nonlinear diffraction. We analyze how NRND is affected by the group-velocity mismatch between fundamental and second-harmonic pulses and by the parameters of the structure. Our experimental results prove the theoretical predictions. (C) 2014 Optical Society of America
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