Optical communication systems using Stokes-vector direct detection

2015 Fiscal Year Final Research Report

• Project/Area Number: 26630146
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Electron device/Electronic equipment
• Research Institution: The University of Tokyo
• Principal Investigator: Kikuchi Kazuro 東京大学, 工学(系)研究科(研究院), 教授 (50134458)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 光ファイバ通信

Outline of Final Research Achievements

The Stokes vector of an optical signal does not depend on its absolute phase; therefore, we can construct the phase-insensitive optical communication system, using the Stokes vector as a modulation parameter. In such a system, multi-level optical signals can effectively be designed in the three-dimensional Stokes space and demodulated by direct detection, where low-complexity digital-signal processing is employed. We discuss the receiver configuration for the multi-level signal in the Stokes space and the efficient DSP algorithm for demodulating such a signal. Simulation results demonstrate that 16-ary signals in the Stokes space have good bit-error rate characteristics. Especially, the 16-ary signal at the moderate symbol rate of 25 Gsymbol/s can reach the bit rate of 100 Gbit/s even by using direct detection.

Free Research Field

光通信