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Optica Publishing Group
  • CLEO/Europe and IQEC 2007 Conference Digest
  • (Optica Publishing Group, 2007),
  • paper CE7_3

Mg-doped congruent LiTaO3 for high power quasi-phase matching device

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Nonlinear ferroelectric crystals with large nonlinear coefficients such as LiNbCb (LN) and LiTaO3 (LT) are suitable for quasi-phase matching (QPM) device fabricated by periodic field poling method. Doping of Mg into the crystals have realized practical improvements of increased optical-damage resistance and decreased coercive field for the field poling, and Mg-doped congruent LN (MgLN) is one of major material as a high power nonlinear QPM device. LT crystal has a shorter absorption edge (~270 nm) at UV range compared to LN crystal (~320 nm), which is suitable for high power QPM device using ~1 μm pumping source because the crystal damage induced by the absorption of harmonics by the pumping source can be reduced. Recently. Mg-doped congruent LT (MgLT) crystal are newly developed, although detailed characterization for fabricating a QPM structure using MgLT have not been reported. In this study, characterization of optical- and thermal-properties of MgLT will be presented, and compared to that of MgLN. Also, coercive field will be evaluated by realizing a QPM structure in MgLT.

© 2007 IEEE

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