Open AccessCompact multimode waveguide based temperature-insensitive Mach-Zehnder interferometer
Author(s) -
Yingxuan Zhao,
Chao Qiu,
Aimin Wu,
Yang Li,
Lue Tao,
Zhen Sheng,
Wei Li,
Xi Wang,
Fuwan Gan
Publication year - 2019
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.27.020373
Subject(s) - optics , interferometry , mach–zehnder interferometer , waveguide , extinction ratio , multi mode optical fiber , materials science , free spectral range , silicon on insulator , insertion loss , wavelength , optoelectronics , physics , optical fiber , silicon
A novel multimode waveguide based Mach-Zehnder interferometer (MZI) is demonstrated on an SOI platform with the properties of compact footprint and temperature-insensitive operation. The device can achieve a thermal dependence around 13pm/°C in a wavelength range of 40nm. Owing to the utilization of one single straight multimode waveguide, the device is naturally immune to local temperature distributions. The measured results exhibit transmissions with an extinction ratio better than 8dB and a minimum insertion loss lower than 0.31dB over the wavelength range of 1545nm-1585nm. Moreover, the proposed device is compatible with CMOS process.