Title :
A Compact Optical Multiplexer Using Silicon Nano-Waveguides
Author :
Sahu, Partha Pratim
Author_Institution :
Dept. of Electron. & Commun. Eng., Tezpur Univ., Tezpur, India
Abstract :
An ultracompact optical-multiplexer-based two-mode interference (TMI) coupler has been designed for the first time using a mathematical model based on sinusoidal modes and implemented with silicon nano-waveguides. The multiplexing characteristics of the device are verified with the beam propagation method and are also demonstrated experimentally. The coupling length for the TMI coupler for multiplexing of wavelength channels of spacing ~10 nm is five times less than that of a conventional multimode interference (MMI) coupler of width 660 nm. The effect of fabrication tolerance on crosstalk of the TMI coupler is found to be less than that of conventional MMI couplers and of TMI coupler based on tooth-shaped grating structure.
Keywords :
channel spacing; elemental semiconductors; integrated optics; multiplexing equipment; nanophotonics; optical communication equipment; optical couplers; optical crosstalk; optical fabrication; silicon; Si; TMI coupler; beam propagation method; fabrication tolerance; mathematical model; multiplexing characteristics; optical crosstalk; silicon nano-waveguides; sinusoidal modes; two-mode interference coupler; ultracompact optical-multiplexer; wavelength channel spacing; Integrated optics; nano-waveguides; two mode interference;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2009.2022048
