Periodical poling characteristics of congruent MgO:LiNbO[sub 3] crystals at elevated temperature

Ishizuki, Hideki; Shoji, Ichiro; Taira, Takunori
June 2003
Applied Physics Letters;6/9/2003, Vol. 82 Issue 23, p4062
Academic Journal
A structure for quasi-phase matching of large cross section using 5 mol % MgO-doped LiNbO[SUB3] (MgO:LN) crystal for high-power wavelength conversion was realized. We have found that the coercive field to invert polarization of the crystal reduces drastically with elevated temperature. The coercive field reduces to 1.2 kV/mm at 250 °C, which is about 1/4 compared with that for MgO:LN at room temperature (RT) and about 1/17 of that for LN at RT. 3 mm thick periodically poled MgO:LN has been fabricated with 30 μm period.


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