Quasi-phase matched second harmonic generation in periodically poled Rb-doped KTiOPO4 ridge waveguide
Optics Express, 2018•opg.optica.org
A 10.8 µm wide ridge waveguide was fabricated by diamond-blade dicing in an ion-
exchanged periodically poled Rb-doped KTiOPO_4 sample. The waveguide was used to
generate blue second harmonic light at 468.8 nm in the TM_00 mode through first order
Type I quasi-phase matching, exploiting the large d_33 coefficient of the crystal. It was
evaluated using a cw Ti: Sapphire laser, and 6.7 µW of blue light was generated with 5.8
mW of fundamental radiation at 933.8 nm coupled through the waveguide. The results …
exchanged periodically poled Rb-doped KTiOPO_4 sample. The waveguide was used to
generate blue second harmonic light at 468.8 nm in the TM_00 mode through first order
Type I quasi-phase matching, exploiting the large d_33 coefficient of the crystal. It was
evaluated using a cw Ti: Sapphire laser, and 6.7 µW of blue light was generated with 5.8
mW of fundamental radiation at 933.8 nm coupled through the waveguide. The results …
A 10.8 µm wide ridge waveguide was fabricated by diamond-blade dicing in an ion-exchanged periodically poled Rb-doped KTiOPO_4 sample. The waveguide was used to generate blue second harmonic light at 468.8 nm in the TM_00 mode through first order Type I quasi-phase matching, exploiting the large d_33 coefficient of the crystal. It was evaluated using a cw Ti:Sapphire laser, and 6.7 µW of blue light was generated with 5.8 mW of fundamental radiation at 933.8 nm coupled through the waveguide. The results presented here pave the way for efficient nonlinear processes in a waveguide format.
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