Design issues such as optical transmission, interference mechanisms, the splitting ratio, the polarization dependence, and the fabrication tolerances of a compact parabolically tapered multimode-interference (MMI)-based 3-dB power splitter on an InP-based deeply etched ridge waveguide, by use of the finite-element-based beam-propagation method, are presented. The benefits and drawbacks of the use of the tapered structure, in comparison with an untapered MMI-based 3-dB splitter, have also been investigated.
© 2004 Optical Society of America
Original Manuscript: January 5, 2004
Revised Manuscript: June 14, 2004
Manuscript Accepted: June 17, 2004
Published: September 20, 2004
Christos Themistos, Muttukrishnan Rajarajan, B. M. Azizur Rahman, Salah S. A. Obayya, and Kenneth T. V. Grattan, "Rigorous comparison of parabolically tapered and conventional multimode-interference-based 3-dB power splitters in InGaAsP/InP waveguides," Appl. Opt. 43, 5228-5235 (2004)