High-speed and low power consumption VCSEL photonics

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H02248
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Electron device/Electronic equipment
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: Koyama Fumio 東京工業大学, 科学技術創成研究院, 教授 (30178397)
• Co-Investigator(Kenkyū-buntansha): 坂口 孝浩 東京工業大学, 科学技術創成研究院, 助教 (70215622)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 面発光レーザ / 光インターコネクト / データセンタ / 半導体レーザ / 直接変調 / 外部変調器

Outline of Final Research Achievements

We proposed and demonstrated high speed VCSEL photonics using a coupled cavity structure functioning like optical equalization. The small signal analysis based on rate equations was carried out to be over 100GHz by increasing the number of cavities. A 850 nm-band transverse coupled-cavity VCSEL has shown a 3dB bandwidth over 29 GHz, and a single-mode VCSELs exhibits a 30 GHz bandwidth after resonance tuning and large signal modulation up to 48GHz. Energy power consumption can be below 100 fJ/bit. We achieved the lowest power consumption of below 70fJ/bit. We also demonstrated output over 1mW for modulator integrated devices.

Free Research Field

光エレクトロニクス