A study on Kramers-Kronig Relation-based Optical Transceiver

2021 Fiscal Year Final Research Report

• Project/Area Number: 20K14739
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 21020:Communication and network engineering-related
• Research Institution: Tokyo University of Science
• Principal Investigator: Kariyawasam Amila 東京理科大学, 理工学部電気電子情報工学科, 助教 (90801192)
• Project Period (FY): 2020-04-01 – 2022-03-31
• Keywords: 光通信 / 直接検波 / KK受信 / ファイバ伝送

Outline of Final Research Achievements

In direct detection (DD) optical communication systems where cost and power consumption reduction are priorities, transmission distance is limited by fiber dispersion. Kramers-Kronig (KK) relation-based receiver can compensate for fiber dispersion after DD. However, the requirements of high-speed signal processing and an optical tone are some issues of the KK receiver.
In this research project, we focused on the implementation aspect and investigated the following four major issues for the KK optical transceiver. (1) Influence of quantization during A/D conversion, (2) Methods to reduce the digital upsampling required for optical field restoration, (3) Effects of the modulation format of the optical signal during KK reception, and (4) Transmission characteristics of the system based on the KK receiver.

Free Research Field

通信工学

Academic Significance and Societal Importance of the Research Achievements

本研究ではKK受信の際必要とされるディジタルアップサンプルおよび光トーンパワー対信号パワー比を低減できる新しアルゴリズムが提案された．また，KK受信方式を用いる光通信システムの伝送限界やそれに変調フォーマットが与える影響について明らかになった．
これらの結果よりトランシーバのコストだけではなく，消費電力の低減が可能になるため，持続可能な光通信システムの実装に貢献する可能性がある．