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Opt Express. 2008 Sep 1;16(18):14180-5.

Second harmonic generation of periodically poled potassium titanyl phosphate waveguide using femtosecond laser pulses.

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College of Physical Science and The Key Laboratory of Weak Light Nonlinear Photonics, Nankai University, Ministry of Education, Tianjin 300071, People's Republic of China.


The authors have presented in this paper the fabrication and characterization of double line written type waveguides in c-cut periodically poled potassium titanyl phosphate crystals. The waveguides were fabricated by using a femtosecond laser, and were utilized for second harmonic generation at 1064 nm. Our experiments have shown that single mode propagation was observed at optimal waveguide width of 14.5 microm. And a conversion efficiency of 39.6% can be achieved.

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