Abstract

A 1500-nm-band laser signal is upconverted to the mid-visible part of the spectrum by quasi-phase matched, sum-frequency generation with an 800-nm-band laser pump in a periodically poled KTiOPO4. For an appropriate combination of the two fundamental wavelengths, an acceptance bandwidth of 40–60 nm cm for the pump wavelength is attainable simultaneously with a temperature acceptance bandwidth of 60–70 °C cm in an angularly noncritical condition. Using a distributed feedback laser at 1590 nm and a Fabry-Perot laser at 807 nm, we demonstrate a temperature tolerance as large as 60 °C with a 10-mm-long crystal.

© 2004 Optical Society of America

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