Open AccessBroadband silicon four-mode multi/demultiplexer designed by a wavefront matching method
Author(s) -
Yukihiro Sawada,
Takeshi Fujisawa,
Takanori Sato,
Kunimasa Saitoh
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.434178
Subject(s) - demultiplexer , optics , wavefront , power dividers and directional couplers , broadband , phase matching , physics , materials science , multiplexing , computer science , multiplexer , telecommunications , laser
We propose a broadband silicon four-mode multi/demultiplexer which consists of three asymmetric directional couplers, and the asymmetric directional couplers were designed by a wavefront matching method to operate as mode multi/demultiplexers for TE 1 , TE 2 , and TE 3 modes, respectively. Simulated results show that the -0.5-dB bandwidths of normalized transmission of the couplers designed by a wavefront matching method are 112, 114, and 134 nm, respectively. Those for the conventional couplers are 80, 72, 65 nm, respectively. The superiority of asymmetric directional couplers designed by a wavefront matching method are experimentally demonstrated. In the additional investigation, ultrabroadband tapered asymmetric directional couplers are theoretically demonstrated.