• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Semiconductor Optical Switches Utilizing Thickness Modulation in Depletion Layer

Research Project

Project/Area Number 01550307
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 電子機器工学
Research InstitutionKanazawa University

Principal Investigator

YAMADA Minoru  Kanazawa University, Faculty of Technology, Professor, 工学部, 教授 (80110609)

Co-Investigator(Kenkyū-buntansha) KUWAMURA Yuuji  Kanazawa University, Faculty of Technology, Associate, 工学部, 助手 (10195612)
Project Period (FY) 1989 – 1990
Project Status Completed (Fiscal Year 1990)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1990: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1989: ¥1,600,000 (Direct Cost: ¥1,600,000)
Keywordssemiconductor optical switch / semiconductor optical modulator / optical switch / optical modulator / optical communication / optical information processing / optoーelectronics / キャリア密度変化 / 空乏層厚変調 / フランツ・ケルディシュ効果 / 光吸収
Research Abstract

This research project was to fabricate semiconductor optical switches/modulators for further development of optical communication system and optical information processing. The operating mechanism of our switches is based on the absorption change by depleting around the p-n junction, which is newly proposed by the authors. Two different types of the switch were fabricated. One is the wave-guide type and another is the panel type. Both types were made of AlGaAs/GaAs alloy system grown with the liquid phase epitaxy.
As the progress of the wave-guide type switches, 3% change of the transmission was obtained with 8V variation of the applied voltage in 1989, and reached to 99.97% (35dB) of the change in 1990, which may be the top record in world among all optical switches operating with any electronic mechanism. The reason of our progress comes from honest investigation on the diffusion effect of the impurity atom caused under the crystal growth and improvement of the designing method of the … More device. We confirmed the operation of the fabricated device based on the above mentioned mechanism through several measurements. The modulation band width of the device was several 10MHz, which was well characterized with the electric capacitance. By reducing of the capacitance by makiing multi-layer structure as well as narrow stripe structure, the modulation band width may be more widened in future.
We also fabricated the panel type structure in succeeding to the wave-guide type. We fabricated preliminary structure consisting with two sets of the p-n junctions because of technical difficulty on crystal growth with liquid phase epitaxy, although the final structure of the panel should consist with large number of the p-n junctions. Connecting three pieces of the device, that is, consisting of 6 sets of the junctions, 10% change of the incident light was observed with 18V variation of the applied voltage. We will improve the device by changing the voltage applying method and making the multi-layer structure in future.
We named our device as EDAC (Electron Depleting Absorption Control) Optical Switch/Modulator. Less

Report

(3 results)
  • 1990 Annual Research Report   Final Research Report Summary
  • 1989 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] M.Yamada,K.Noda,H.Nakanishi,Y.Kuwamura and T.Kawabata: "A semiconductor optical switch utilizing optical absorption in dep letion layer" IEE J.Lightwave Technolgy.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] M. YAMADA, K. NODA, H. NAKANISHI, Y. KUWAMURA and T. KAWABATA: ""A semiconductor optical switch utilizing optical absorption in depletion layer"" IEEE J. Lightwave Technology.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] M.Yamada,K.Noda,H.Nakanishi,Y.Kuwamura and T.Kawabata: "A semiconductor optical switch utilizing optical absorption in depletion lays" IEEE J.Lightwave Technology.

    • Related Report
      1990 Annual Research Report
  • [Publications] Minoru YAMADA,Michihiko SUHARA: "Analysis of Excess Noise Induced by Optical Feedback in Semiconductor Lasers Based on Mode Competition Theory" Trans.of IEICE. E73. 77-82 (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] Minoru YAMADA,Yoshinori HARAGUCHI: "Temperature Dependences of Threshold Current and Linewidth Enhancement Factor in Modulation-Doped Semiconductor Laser" Trans.of IEICE. E73. 131-132 (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] Minoru YAMADA,Masahiro KAMIYA,Yuji KUWAMURA: "Method for Estimating the Threshold Current Level in Semiconductor Injection Lasers" Trans.of IEICE. E73. 133-134 (1990)

    • Related Report
      1989 Annual Research Report

URL: 

Published: 1989-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi