分析光耦合进入介质波导薄膜(具有光强度相关折射率)的耦合过程表明,与线性光学耦合过程不同,传递函数在耦合区内不是常数.用数字模拟调整非线性介质层在耦合区内的厚度分布使耦合过程优化,满足了相应匹配条件.

Modes of coupling an external radiation field into an integrated optics waveguide, of which the guiding film is characterized by an in tensity-dependent refractive index, have been analyzed. Unlike the linear optical coupling, the transfer function is not a constant through its coupling area in a nonlinear coupler. The coupling efficiency can be increased by contouring suitably the layer of the nonlinear material in the coupling region.