Extended phase matching of second-harmonic generation in periodically-poled KTiOPO4 with zero group-velocity mismatch
نویسندگان
چکیده
Under extended phase-matching conditions, the first frequency-derivative of the phase-matching function is zero and the phase-matching bandwidth is greatly increased. We made extensive three-wave mixing measurements to identify the operating point for extended phase matching, thus permitting us to observe a type-II phase-matching bandwidth of 100 nm centered at the fundamental wavelength of 1584 nm for second-harmonic generation in a 1-cm-long flux-grown periodically-poled KTiOPO4. c © 2003 Optical Society of America
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