Study on all-optical binary logic processor with ultra-low threshold for digital photonics

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H03578
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Optical engineering, Photon science
• Research Institution: Yokohama National University
• Principal Investigator: Kokubun Yasuo 横浜国立大学, 大学院工学研究院, 教授 (60134839)
• Co-Investigator(Kenkyū-buntansha): 荒川 太郎 横浜国立大学, 工学(系)研究科(研究院), 助教授 (40293170)
• Research Collaborator: KOBAYASHI Naoki ; KAWAMURA Yusaku ; AOKI Ryosuke ; TAKAZAWA Hiroki ; HOMMA Hiroyuki ; KOMATSUBARA Takuya ; HAYASAKA Nobuyuki ; KAWAGUCHI Naoki ; HORI Kento ; YOSHIDA Soichiro ; ISHIHARA Shintaro ; GAUTAM Rajdeep ; NISHIMURA Masaki
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: マイクロリング共振器 / 全光インバータ / 全光２値論理 / 全光フリップフロップ / 半導体レーザ / 注入同期 / 非対称方向性発振

Outline of Final Research Achievements

To realize all-optical binary logic device suitable for cascade integration based on adjacent lasing wavelengths of multiple-quantum-well (MQW) semiconductor microring lasers (SMRLs), we investigated the unidirectional selective lasing condition and found that the phase of feedback light from a reflection facet affects the power ratio of clockwise to counterclockwise lasing. Using this knowledge, we designed a unidirectional microring laser.
Next, we demonstrated that all-optical flip-flop and inverter operations using two adjacent lasing wavelengths can be realized in the identical semiconductor microring laser and the operations are switchable periodically with the phase of feedback light from a reflection facet. Lasing conditions for the switching of operations are investigated experimentally and compared with a theoretical model.

Free Research Field

工学，光エレクトロニクス