This paper presents an overview of self-imaging principle used in MMI couplers and also explains the application of multimode waveguide as an optical switch. The application of MMI coupler to realize a 2×2 optical switch has been explained by varying the refractive indices of various regions of MMI section by only 1-2% and the switch is found to exhibit 2-10% loss for various coupling states at different power inputs. Then the basic 2×2 switch is exploited in design of 4×4 benes switch. Benes switch is used as it is suitable for large switches requiring fewer SOAs which make it a good candidate for further use in higher order switches. Simulation results are shown. Power coupling losses occurring in 4×4 switch are compensated using minimum number of SOAs with low input injection current of the order of 10-20mA.
Design and analysis of low loss MMI based 4×4 optical switch using Benes architecture with SOAs
2008-12-01
330351 byte
Conference paper
Electronic Resource
English
A Novel Integrated Multistage 2-D MEMS Optical Switch With Spanke-Benes Architecture
British Library Online Contents | 2008
|Coherent Multipath Crosstalk in Benes and Dilated Benes Optical Switches
British Library Conference Proceedings | 1997
|Cascadability Properties of Optical 3R Regenerators Based on SOAs
British Library Online Contents | 2007
|Online Contents | 2000