Numerical analysis of all-optical modulation in a symmetric, nonlinear Y junction, considering the polarization coupling
| Autor: | G. Neumann, U. Hempelmann, M. Bücker |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Physics
Waveguide (electromagnetism) Birefringence business.industry Wave propagation Physics::Optics Statistical and Nonlinear Physics Polarization (waves) Wave equation Atomic and Molecular Physics and Optics Nonlinear system Optics Cross-polarized wave generation Quantum electrodynamics business Refractive index |
| Zdroj: | Journal of the Optical Society of America B. 14:1361 |
| ISSN: | 1520-8540 0740-3224 |
| DOI: | 10.1364/josab.14.001361 |
| Popis: | The wave propagation in symmetric, nonlinear, integrated-optical Y junctions is investigated with consideration of the nonlinear polarization coupling. The propagation of the field in the waveguide structure is described by a coupled pair of nonlinear two-dimensional wave equations, which are solved numerically by the beam-propagation method. The nonlinear Y junction is analyzed with respect to its application for all-optical modulation of a strong pump wave by a weak control beam. It is shown that sensitive continuous amplitude-to-amplitude modulation as well as phase-to-amplitude modulation is possible. This operation is stable with respect to the total powers in each output waveguide, despite the nonlinear-polarization coupling that, for example, is caused by a polarization error of the input field. Further, the results indicate that the conditions for a polarization-maintaining operation can be obtained from the known closed-form solutions for nonlinear polarization coupling in birefringent optical fibers. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|