Abstract
We have theoretically demonstrated type II broadband second-harmonic generation (SHG) based on a quasi-phase-matching (QPM) configuration in periodically poled KTP (PPKTP). The wavelength dependence of QPM grating periods at different temperatures of 5 °C, 25 °C, and 45 °C is calculated with the crystal length of 1 cm. We find a very wide bandwidth, as large as 42.6 nm, of fundamental wavelength of 1.58 μm at the telecommunication band with the QPM period of 48.9 μm at 25 °C. The corresponding bandwidths of incident angle and temperature are found to be 4.24° and 14.8 °C, respectively. The comparison among PPKTP, periodically poled lithium niobate (PPLN), and MgO:PPLN reveals the unique performance of PPKTP in the broadband SHG.
© 2005 Optical Society of America
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