Abstract
Periodically poled crystals are a relatively new class of materials artificially made for quasi- phasematched (QPM) nonlinear optical frequency conversion. Crystals from the KTiOPO4 (KTP) family are particularly attractive for periodic poling as they have low coercive fields (approximately 10 times lower than LiNbO3) and a quasi-one dimensional crystal structure which together makes it possible to fabricate fine pitch gratings in relatively thick crystals.
© 1999 Optical Society of America
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