Research on 100 GSample/s optical quantization using semiconductor optical amplifiers

2018 Fiscal Year Final Research Report

• Project/Area Number: 17K18873
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Research Field: Electrical and electronic engineering and related fields
• Research Institution: The University of Electro-Communications
• Principal Investigator: Matsuura Motoharu 電気通信大学, 大学院情報理工学研究科, 准教授 (40456281)
• Project Period (FY): 2017-06-30 – 2019-03-31
• Keywords: 光A/D変換 / 光量子化 / 半導体光増幅器 / 量子ドット半導体光増幅器 / 周波数シフト

Outline of Final Research Achievements

In this work, we demonstrated an optical quantization technique using red frequency chirp in a semiconductor optical amplifier. First, we investigated the performance of optical filters for slicing input signal pulse induced by red frequency chirp. And, to optimize the optical quantization performance, we evaluated the input power dependence on the performance. Lastly, we successfully achieve 10-GSamples/s, 15-level optical quantization using frequency chirp in a quantum-dot semiconductor optical amplifier. The scheme has much lower input signal power than previously reported schemes.

Free Research Field

通信・ネットワーク工学

Academic Significance and Societal Importance of the Research Achievements

高速なアナログ信号をデジタル信号に変換する需要がデータ通信・解析などの多岐にわたる分野で急速に拡がっている．このため，光領域でアナログ・デジタル変換を行う光アナログ・デジタル変換の研究開発が盛んに行われている．本研究では，これまでにない，小型の半導体素子内で発生する周波数シフトを応用した光量子化技術によって，小型，省電力かつ高性能を実現する実証実験に取り組み，その有効性を明らかにしている．