Multimode Interference devices are analyzed semi-analytically using matrix approach. The propagation constant and mode profile of different modes of a multimode waveguide are determined. The field intensity for the combination of all the modes at different propagation distance is also obtained. The results are in accordance to the theory. The method can be extended to a singlemode-multimode-singlemode device where the concept of overlap integral is introduced at their interface. As this method consists of multiplication of 2X2 matrices, it is simple and computationally fast

Date Published: 5 September 2014
PDF: 7 pages
Proc. SPIE 9200, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications VIII, 92000I (5 September 2014); doi: 10.1117/12.2060997

Published in SPIE Proceedings Vol. 9200:
Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications VIII
Shizhuo Yin; Ruyan Guo, Editor(s)