arXiv physics/97040051997-04-08physics.optics

混合相干耦合器中的功率开关

Power Switching in Hybrid Coherent Couplers

W. D. Deering, M. I. Molina

备注：: Latex source,17 pages, 5 figures
发表信息：: IEEE J. of Quantum Electronics, vol. 33, 336 (1997)
DOI：: 10.1109/3.556001

摘要：

我们报告的理论和数值研究的开关的功率在新的混合模型的非线性相干耦合器组成的光学平板波导与各种阶的非线性。第一个模型由两个二阶而不是通常的三阶耦合系数的Jensen耦合器为代表的指导。这个二阶系统被证明有一个功率自陷过渡在临界功率大于三阶磁化率耦合器。接下来，我们考虑一个混合耦合器组成的二阶引导耦合到一个三阶引导和显示，虽然它不显示严格的自陷过渡，对于一个特定的参数选择，它确实显示了一个相当突然的功率捕获在一个较低的功率比在三阶耦合器。通过将该混合非线性对耦合到第三纯线性引导件，可以将功率陷获带到甚至更低的水平，并且以这种方式，可以在小于Jensen耦合器中所需的输入功率的六分之一的情况下实现令人满意的切换分布。

英文摘要：

We report on a theoretical and numerical investigation of the switching of power in new hybrid models of nonlinear coherent couplers consisting of optical slab waveguides with various orders of nonlinearity. The first model consists of two guides with second-order instead of the usual third-order susceptibilities as typified by the Jensen coupler. This second-order system is shown to have a power self-trapping transition at a critical power greater than the third-order susceptibility coupler. Next, we consider a mixed coupler composed of a second-order guide coupled to a third-order guide and show that, although it does not display a rigorous self-trapping transition, for a particular choice of parameters it does show a fairly abrupt trapping of power at a lower power than in the third-order coupler. By coupling this mixed nonlinear pair to a third, purely linear guide, the power trapping can be brought to even lower levels and in this way a satisfactory switching profile can be achieved at less than one sixth the input power needed in the Jensen coupler.

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