The characteristics of periodically poled RbTiOAsO4 (PPRTA) optical parametric oscillation (OPO) in collinear,
quasi-collinear and noncollinear quasi phase matching (QPM) have been studied. The combination of temperature tuning
and multi-period of PPRTA could provide a quasi-continuous wavelength tuning range of 1.4932 ~ 1.5937μm for
signal wavelength and 3.2018 ~ 3.6992μm for idler wavelength as the period was 39, 39.5 and 40 μm,
respectively, and the temperature between 20 and 120 degrees. The broadband wavelength range of
0.7352 ~ 0.9012μm for the pump wavelength 0.532μm has been obtained when the noncollinear angle was 4.90
degree and the period was 7.4μm.
The relation of the spectral angular dispersion with the fundamental wavelength(FW) and the grating period of
simultaneously quasi phase matching(QPM) and group velocity(GV) matching in tilted second harmonic generation is
carried out in periodically poled RbTiOAsO4(PPRTA).The phase matching bandwidth of PPRTA of noncollinear (2D)
phase matching with spectral angular dispersion( 31.37nm, 218.41nm ) is 58 times and 15 times of those of
collinear(1D) phase matching( 0.54nm,14.38nm )as the fundamental wavelength is 0.8μm and 1.55μm has been
obtained, respectively.
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