Open AccessIntegrated dual-polarization coherent receiver without a polarization splitter-rotator
Author(s) -
Go Soma,
Shota Ishimura,
Ryota Tanomura,
Taichiro Fukui,
Maiko Ito,
Yoshiaki Nakano,
Takuo Tanemura
Publication year - 2021
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.413310
Subject(s) - optics , physics , interferometry , beam splitter , polarization rotator , polarization (electrochemistry) , splitter , dual polarization interferometry , differential phase , photonics , power dividers and directional couplers , photodetector , optoelectronics , computer science , birefringence , phase (matter) , telecommunications , laser , chemistry , quantum mechanics , antenna (radio)
We propose and demonstrate a simple integrated dual-polarization (DP) coherent receiver that does not require a polarization splitter-rotator (PSR). Based on a novel concept, a DP coherent signal is mixed with the local-oscillator (LO) waves inside a single interferometer and detected by five single-ended photodetectors. The signal-signal and LO-LO beat noises are eliminated through differential detection. We design and fabricate a proof-of-concept device on InP and experimentally demonstrate complete retrieval of DP quadrature phase-shift keyed signals. Requiring minimal number of optical components without a PSR, the demonstrated scheme would be attractive particularly for the InP and thick-silicon photonic platforms due to its significantly reduced footprint and ease of fabrication.