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1987 Fiscal Year Final Research Report Summary

A development of a fiber-type PLZT optical switch

Research Project

Project/Area Number 61850067
Research Category

Grant-in-Aid for Developmental Scientific Research

Allocation TypeSingle-year Grants
Research Field 電子機器工学
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

MINAKATA Makoto  Research Institute of Electrical Communication., 電気通信研究所, 助教授 (80174085)

Co-Investigator(Kenkyū-buntansha) 高田 光裕  住友特殊金属(株), 室長
KAWAKAMI Shojiro  Research Institute of Electrical Communication,, 電気通信研究所, 教授 (10006223)
TAKATA Mitsuhiro  Sumitomo Special Metals Co.,Ltd.
Project Period (FY) 1986 – 1987
KeywordsOptica fiber / PLZT seramics / Optical switch / Polarizer / マイクロラッピング
Research Abstract

The purpose of the project is the development of fiber-type PLZT optical switches and technology. The proposed switches are composed of an optical fiber which has a groove, a block of PLZT disposed in the groove, which acts as an electric field-inducing wavelength plate , and two polarizers disposed close to or in contact with both end surfaces of the wavelength plate. Polarizer consists of alternate lamination of a metal and dielectgric (LAMIPOL). To realize the switches, we have been developed new technology, and analized and partially fabricated the optical components.
1. PLZT seramics ; To decide the optimum composition and fabrication process, optical and electrical properties of PLZT fabricated under various conditions have been measured.La/Zr/Ti=9/65/35 is the best composition in the HIP method.
2. PLZT micro modulator (Wavelength plate); The modulator is a ridge type (60x60x980 <micrn>m) formed by mechanical cutter and photolithography. It has about 50 MHz modulation bandwidth, 10 V switching voltage and no insertion loss.
3. LAMIPOLE; The polarizer is fabricated by alternately stachking thin films of Al (-50A) and dielectgric films of SiO2 (-2000A). The conbination of Al film sputtered under the Low background pressure and SiO2 film formed by evapolation shows good characteristics such as TE loss 30 dB and TM loss 0.4 dB at 1.3 <micrn>m wavelength.
4. Formation of fiber groove; To excavate the groove, a micro-rapping technique invented by NTT Lab. is very useful and powerful. We are now under training of the micro-machining.
5. Analysis of a fiberf-type PLZT optical switch; In summary, this switch can be operated at a low voltage(-30V), can achive a high switching speed (more than 50 MHZ),and allows low insertion loss(-0.8 dB) and miniturization of equipment(length 100 <micrn>m), and is best suited to fiber transmission systems.

  • Research Products

    (19 results)

All Other

All Publications (19 results)

  • [Publications] K.Shiraishi; S.Sugaya; K.Baba and S.Kawakami: Applied Optics. 25. 311-314 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Minakata; K.Kumagai; and S.Kawakami: Applied Physics Letters. 49. 27-29 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Shigihara; K.Shiraishi; and S.Kawakami: Journal of Applied Physics. 60. 4293-4296 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Minakata; K.Kumagai; and S.Kawakami: Optoelectronics. 1. 163-173 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.A.Haus; W.P.Huang; S.Kawakami and N.A.Whitaker: IEEE Journal of Lightwave Technology. LT-5. 16-23 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Minakata and Y.Furukawa: Journal of Electronic Materials. 15. 159-164 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 皆方, 坂野, 川上: 電子情報通信学会論文誌. J71-C,5. (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 三浦, 皆方, 川上, : 電子情報通信学会論文誌. J71-C,5. (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Miura;M.Minakata and S.Kawakami: IEEE Journal of Lightwave Technology. LT-6. (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 中村, 皆方, 白石, 川上: 電子情報通信学会論文誌. J71. (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Shiraishi,S.Sugaya,K.Baba and S.Kawakami: "Microisolator" Applied Optics. 25. 311-314 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Minakata,K.Kumagai and S.Kawakami: "Lattice constant changes and electrooptic effects in proton-exchanged LiNbO_3 optical waveguides" Applied Physics Letters. 49. 27-29 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Minakata,K.Kumagai and S.Kawakami: "Lattice constant changes and electro-optic effect in proton-exchanged LiNbO_3 optical waveguides" Optoelectlronics. 1. 163-173 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Minakata and Y.Furukawa: "arF Excimerlaser induced CVD of Aluminum Oxide films" Journal of Electronic Materials. 15. 159-164 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.A.Haus,W.P.Huang,S.Kawakami and N.A.Whitaker: "Coupled-mode theory of optical waveguides" Journal of Lightwave Technology. lt-5. 16-23 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Minakata,T.Sakano and S.Kawakami: "Miniaturized directional coupler-type optical switches" Trans. Institute Electronics,Information and Communication Engineers. j71-c,5. (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Miura,M.Minakata and S.Kawakami: "Ridge-type optical frequencey shifters" Trans. Institute Electronics,Information and Communication Engineers. J71-C,5. (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Miura,M.Minakata and S.Kawakami: "A broad-band traveling-wave LiNbO_3 optical modulator with ghigh efficiency" IEEE Journal of Lightwave Technology. LT-6. (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Nakamura,M.Minakata,K.Shiraishi and S.Kawakami: "A PLZT micro optical switches - proposal of a fiber-type PLZT optical switches -" Trans. Institute Electronics, Information and Communication Engineers. J71-C. (1988)

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

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Published: 1989-03-30  

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