Abstract
Practical use of sum-frequency generation in nonlinear mutilayer waveguides is now achievable with relatively low-power cw semiconductor lasers.1,2 When two cross-polarized counterpropagating guided waves interact through the second-order susceptibility χ(2) of the structure, a sum-frequency signal is emitted from the surface. The angle of emission θSF is directly related to the frequency difference between the two input waves.
© 1995 Optical Society of America
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