Abstract
We present an analysis of a bisected intersecting waveguide in periodically poled lithium niobate that can produce and isolate the second-order optical product E(1+2) E1(1)E2(2) free from the near degenerate second harmonics. Model calculations of such a device fabricated in quasi-phase matched (QPM) LiNbO3 predict a conversion efficiency of 1.5 %/W, about 15% that of a straight waveguide of the same length,and a crosstalk of < -30 dB.
[IEEE ]
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