Journal
APPLIED PHYSICS LETTERS
Volume 76, Issue 9, Pages 1089-1091Publisher
AMER INST PHYSICS
DOI: 10.1063/1.125948
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We report a simple fabrication process for realizing waveguides on periodically poled lithium niobate which preserves both the nonlinearity and the domain inversion. This so-called soft proton exchange has been used to generate highly efficient optical parametric fluorescence in the 1.48-2.01 mu m region using a pump around 830 nm. The measured normalized efficiency is 130% W-1 cm(-2) for an effective interaction length of 1.3 cm. This experimental figure is very close to the maximum theoretically predicted value of 140% W-1 cm(-2). (C) 2000 American Institute of Physics. [S0003-6951(00)01609-0].
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