Open AccessSharp bends and Mach-Zehnder interferometer based on Ge-rich-SiGe waveguides on SiGe graded buffer
Author(s) -
Vladyslav Vakarin,
Papichaya Chaisakul,
Jacopo Frigerio,
Andrea Ballabio,
Xavier Le Roux,
JeanRené Coudevylle,
David Bouville,
Diego Pérez-Galacho,
Laurent Vivien,
Giovanni Isella,
Delphine MarrisMorini
Publication year - 2015
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.23.030821
Subject(s) - materials science , germanium , optics , interferometry , mach–zehnder interferometer , photonic integrated circuit , waveguide , optoelectronics , silicon photonics , photonics , buffer (optical fiber) , beam splitter , silicon , splitter , beam propagation method , silicon on insulator , refractive index , physics , telecommunications , laser , computer science
The integration of germanium (Ge)-rich active devices in photonic integrated circuits is challenging due to the lattice mismatch between silicon (Si) and Ge. A new Ge-rich silicon-germanium (SiGe) waveguide on graded buffer was investigated as a platform for integrated photonic circuits. At a wavelength of 1550 nm, low loss bends with radii as low as 12 µm and Multimode Interferometer beam splitter based on Ge-rich SiGe waveguide on graded buffer were designed, fabricated and characterized. A Mach Zehnder interferometer exhibiting a contrast of more than 10 dB has been demonstrated.