Polarization reversal and domain grating in flux-grown KTiOPO4 crystals with variable potassium stoichiometry
نویسندگان
چکیده
A significant decrease is observed in the dielectric dispersion, conductivity, coercive and internal fields of KTiOPO4 crystals grown with relatively high potassium concentration in the flux. A periodic domain structure with a period of 24.7 mm was fabricated on a 10 mm long crystal by electric field poling. Whereas standard flux-grown KTiOPO4 crystals can be periodically poled only at low temperatures ~near 170 K!, the periodic poling in this case was successfully performed near room temperature at a much lower electric field. Quasiphase-matched frequency doubling of 1550 nm radiation was achieved with the poled crystal. © 2000 American Institute of Physics. @S0003-6951~00!00925-6#
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