Open AccessThin heterogeneous SOI waveguides for thermo-optical tuning and filtering
Author(s) -
А.В. Царев,
Francesco De Leonardis,
Vittorio M. N. Passaro
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.003101
Subject(s) - silicon on insulator , materials science , optics , optoelectronics , waveguide , silicon , silicon photonics , distributed bragg reflector , wavelength , physics
This work presents an analysis and simulation of novel heterogeneous silicon-on-insulator (SOI) waveguide structures for reconfigurable optical add/drop multiplexers (ROADMs) with thermo-optic tuning and multi-reflector beam expanders. New structure design includes p(+) side-doping of SOI ridge waveguide with 220 nm x 16 microm silicon core. It provides quasi mono-mode behavior due to strongly mode-dependent optical losses by free charge absorption. These silicon heterogeneous waveguides are used to investigate ROADMs including nano-structured 2D-gratings for fiber coupling and polarization diversity, nano-grooves or p(+) doping reflector strips for multi-reflector beam expanders and local heaters for wideband thermo-optic tuning.