Nonlinear optical effect compensation method applying coding modulation method in long distance optical fiber transmission

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K04386
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 21020:Communication and network engineering-related
• Research Institution: Ibaraki University
• Principal Investigator: Naka Akira 茨城大学, 理工学研究科(工学野), 教授 (20765854)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 非線形光学効果 / 符号化変調

Outline of Final Research Achievements

We have proposed a novel coded modulation signal that has a function of reducing nonlinear optical effects and is highly sensitive. We also evaluated the transmission characteristics of long-distance optical fiber transmission and found optical fiber transmission line conditions that maximize nonlinear optical compensation by signal processing.
We proposed a method to apply BICM-ID (bit interleaved coded modulation-repetitive detection) to the amplitude distribution shaping method (PAS method: stochastic amplification type shaping), which is one of the coding modulation methods. We have also proposed a method to reduce burst errors peculiar to the PAS. These research results were presented externally as 3 papers, 1 international conference, and 13 conference presentations.

Free Research Field

光通信

Academic Significance and Societal Importance of the Research Achievements

今回取り組んだ多次元符号化光変調方式の高度化は、無線伝送分野でも研究が進んでいる情報理論に基づく符号化変調方式をさらに発展させ、光ファイバ通信特有の条件を考慮して応用を試みる点に大きな学術的意義がある。今回得られた成果は、近年のインターネットを介した動画や音楽などの大容量コンテンツの普及に伴い、益々重要性を増している光通信ネットワークの超高速化・大容量化のための基盤技術を提供する。