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2002 Fiscal Year Final Research Report Summary

Development of high gain and broadband superconducting booster circuit for optical modulator

Research Project

Project/Area Number 12555013
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Applied optics/Quantum optical engineering
Research InstitutionKyushu University

Principal Investigator

YOSHIDA Keiji  Kyushu University, Graduate School of Information Science and Electrical Engineering, Professor, 大学院・システム情報科学研究院, 教授 (80108670)

Co-Investigator(Kenkyū-buntansha) KANAYA Haruichi  Kyushu University, Graduate School of Information Science and Electrical Engineering, Research Associate, 大学院・システム情報科学研究院, 助手 (40271077)
KISU Takanobu  Kyushu University, Graduate School of Information Science and Electrical Engineering, Associate Professor, 大学院・システム情報科学研究院, 助教授 (00221911)
ENPUKUK Keiji  Kyushu University, Graduate School of Information Science and Electrical Engineering, Associate Professor, 大学院・システム情報科学研究院, 助教授 (20150493)
UCHIYAMA Tetsuji  CRL, KARC Superconductive Electronics Group, Research Fellow, 超伝導研究室, CRL特別研究員(研究職)
王 鎮  情報総合研究所, 超伝導研究室, 室長(研究職)
WANG Zhen  CRL, KARC Superconductive Electronics Group, Leader
Project Period (FY) 2000 – 2002
KeywordsSuperconductor / Optical Modulator / Microwave-Optical Device
Research Abstract

The design and performance of a LiNbO3 optical modulator and switch, which employ superconducting circuits, have been studied. Based on a novel design method of the booster circuit using superconducting coplanar waveguide transmission lines, we designed a voltage amplifier with center frequency of 10GHz, bandwidth of 5MHz, and the voltage gain of 33dB using an electromagnetic wave simulator. We also designed a high-speed optical switch combining optical directional coupler and Mach-Zehnder interferometer.
A preliminary experiment with YBCO electrode on MgO substrate flip-chip-bonded on LiNbO3 optical waveguide has been made. We designed the booster circuit with the meanderline 3-pole Chebyshev filter fabricated by a YBCO thin film on a MgO substrate with the dimension of 10[mm]×10[mm]. The YBCO electrode on MgO substrate was flip-chip bonded onto an optical waveguide in a LiNbO3 substrate, and was cooled down by a refrigerator. The comparison of the observed group delay of S11 (return loss) of the device and the simulation results. The observed data are in reasonable agreements with those expected from theory.

  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] K.Yoshida, et al.: "Design and performance of high gain superconducting booster circuit for LiNbO3 optical modulator"Physica C. 372. 360-363 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Kanaya, et al.: "Design and Performance of High Tc Superconducting Coplanar Waveguide Matching Circuit for RF-CMOS LNA"IEICE Trans.Electron.. E86-C. 37-41 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Yoshida, et al.: "Design and Performance of Superconducting Circuit for LiNbO3 Optical Modulator and Switch"IEEE Trans.Appl.Supercond.. 12(in press). (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Kanaya, et al.: "Design of HTS Coplanar Waveguide Matching Circuit for Low Noise CMOS-HTS Receiver"IEEE Trans.Appl.Supercond.. 12(in press). (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K. Yoshida, et al.: "Design and performance of high gain superconducting booster circuit for LiNbO3 optical modulator"Physica C. 372. 360-363 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Kanaya, et al.: "Design and Performance of High Tc Superconducting Coplanar Waveguide Matching Circuit for RF-CMOS LNA"IEICE Trans. Electron.. E86-C. 37-41 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Yoshida, et al.: "Design and Performance of Superconducting Circuit for LiNbO3 Optical Modulator and Switch"IEEE Trans. Appl. Supercond. 12. (in press). (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Kanaya, et al.: "Design of HTS Coplanar Waveguide Matching Circuit for Low Noise CMOS-HTS Receiver"IEEE Trans. Appl. Supercond. 12. (in press). (2003)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2004-04-14  

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