Physics – Optics
Scientific paper
2005-05-31
Applied Physics B: Lasers and Optics. Volume 81, Number 5, pages: 645 - 650. Date: September 2005
Physics
Optics
19 pages, 6 figures
Scientific paper
10.1007/s00340-005-1923-1
A new method for characterization of periodically poled crystals is developed based on spontaneous parametric down-conversion. The method is demonstrated on crystals of Y:LiNbO3, Mg:Y:LiNbO3 with non-uniform periodically poled structures, obtained directly under Czochralski growth procedure and designed for application of OPO in the mid infrared range. Infrared dispersion of refractive index, effective working periods and wavelengths of OPO were determined by special treatment of frequency-angular spectra of spontaneous parametric down-conversion in the visible range. Two-dimensional mapping via spontaneous parametric down-conversion is proposed for characterizing spatial distribution of bulk quasi-phase matching efficiency across the input window of a periodically poled sample.
Kang Hyon Chol
Kitaeva Kh. G.
Naumova I. I.
Penin A. N.
Tang Siu-Hung
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