Open AccessGaInAsP/InP MZI waveguide optical isolator integrated with spot size converter
Author(s) -
Yohei Sobu,
Yuya Shoji,
Kazuo Sakurai,
Tetsuya Mizumoto
Publication year - 2013
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.21.015373
Subject(s) - optical isolator , materials science , optics , cladding (metalworking) , isolator , waveguide , interferometry , optoelectronics , optical fiber , physics , electronic engineering , metallurgy , engineering
We fabricated a waveguide optical isolator with a GaInAsP guiding layer integrated with spot size converters (SSCs) for efficient coupling to optical fibers. The isolator is constructed with a Mach-Zehnder interferometer (MZI), which is composed of multi-mode interference (MMI) couplers, as well as nonreciprocal and reciprocal phase shifters. The nonreciprocal phase shifter is constructed with a magneto-optical cladding layer directly bonded to a semiconductor guiding layer. The performance of the GaInAsP waveguide optical isolator was demonstrated with a maximum optical isolation of 28.3 dB at a wavelength of 1558 nm for the TM mode.