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XIAOLING ZHONG1, MING YIN1, MENGXUE LIAN1
- School of Information Science and Technology, Chengdu University of Technology, Chengdu, 610059, China
Damage threshold of some periodically poled crystals can be improved by magnesium oxide doping , however, some properties of the crystals are also changed as a result of magnesium oxide doping. In this paper, type 0 quasi-phase matching (QPM) broadband second-harmonic generation (SHG) characteristics are compared in pure periodically poled stoichiometric lithium tantalate (PPSLT) and periodically poled 1 mol% magnesium oxide-doped stoichiometric lithium tantalate (1 mol% MgO:PPSLT). In both crystals, the group-velocity matching (GVM) fundamental wavelengths, QPM poling periods and SHG bandwidths are analyzed at room temperature, the tuning ranges of GVM fundamental wavelength are calculated with crystal temperature changing, the SHG bandwidths are obtained at different temperatures. The GVM fundamental wavelength in 1 mol% MgO:PPSLT appears little blue shift compared with that in PPSLT, the SHG bandwidth in 1 mol% MgO:PPSLT is a little narrower than that in PPSLT. There are some overlaps between tuning ranges of GVM fundamental wavelength in two crystals, the tuning range of GVM fundamental wavelength in 1 mol% MgO:PPSLT is wider than that in PPSLT. The results can be used to select different magnesium oxide-doped PPSLTs for different requirements QPM broadband SHG..
Broadband, Quasi-phase matching, Second-harmonic generation, Periodically poled lithium tantalate, Magnesium oxide doping.
Submitted at: April 7, 2016
Accepted at: Aug. 3, 2016
XIAOLING ZHONG, MING YIN, MENGXUE LIAN, Comparison of broadband second-harmonic generation in periodically poled stoichiometric lithium tantalate with different magnesium oxide doping concentrations, Journal of Optoelectronics and Advanced Materials Vol. 18, Iss. 7-8, pp. 613-617 (2016)
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