Decoding of Multilevel Stokes-Vector Modulated Signal by Polarization-Analyzing Circuit on InP

Of-late research on Stokes vector receivers for the short-reach optical communications has gained significant attention due to its capability to decode information in multidimension using cost-effective direct-detection technique. Here, we consider the use of InP for potentially low-cost direct-dete...

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Bibliographic Details
Published in:Journal of lightwave technology 2018-01, Vol.36 (2), p.187-194
Main Authors: Ghosh, Samir, Tanemura, Takuo, Kawabata, Yuto, Katoh, Kazuhiro, Kikuchi, Kazuro, Nakano, Yoshiaki
Format: Article
Language:English
Subjects:
Converters
Decoding
Low cost
Mathematical analysis
Optical communication
Polarization
Receivers
Vectors (mathematics)
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Summary:Of-late research on Stokes vector receivers for the short-reach optical communications has gained significant attention due to its capability to decode information in multidimension using cost-effective direct-detection technique. Here, we consider the use of InP for potentially low-cost direct-detection-based Stokes vector (SV) receiver. It consists of a 1 × 4 multimode interference power splitter with different combination of polarization converters on output arms, so that input SV is projected onto distinct vectors on the Stokes space. By using the fabricated device, we experimentally demonstrate decoding of two-level and four-level SV-modulated signals at 3 Gbaud. With the potential of monolithically integrating high-speed InP photodetector array on the same chip, it paves the way to realize compact and low-cost SV receivers for multilevel SV modulation formats in future short-reach optical communication links.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2018.2791623