Open AccessMonolithic polarization diversity coherent receiver based on 120-degree optical hybrids on silicon
Author(s) -
Po Dong,
Chongjin Xie,
L. L. Buhl
Publication year - 2014
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.22.002119
Subject(s) - optics , polarization (electrochemistry) , multi mode optical fiber , physics , photonics , photonic integrated circuit , degree of polarization , silicon photonics , silicon , optoelectronics , astronomical interferometer , materials science , interferometry , optical fiber , chemistry , scattering
We present a monolithic polarization diversity coherent receiver by employing 120-degree optical hybrids on a silicon photonic integrated circuit (PIC). This PIC monolithically integrates silicon inverse tapers for fiber coupling, silicon polarization splitters, germanium high-speed photo detectors, and 120-degree optical hybrids based on 3x3 multimode interferometers (MMI). We demonstrate that 112-Gb/s polarization-division-multiplexed quadrature phase-shift keyed signals are detected in the wavelength range of 1530-1580 nm with comparable performance to commercial receivers.