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Study on the Effect of Reflected Lights on Mode Partition Characteristics of Dynamic Single-Mode Laser Diodes

Research Project

Project/Area Number 03650275
Research Category

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

Allocation TypeSingle-year Grants
Research Field 電子通信系統工学
Research InstitutionNagoya University

Principal Investigator

MORI Masakazu  Nagoya Univ., School of Engineering, Associate Prof., 工学部, 助教授 (70210135)

Project Period (FY) 1991 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1992: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1991: ¥1,600,000 (Direct Cost: ¥1,600,000)
KeywordsReflection-Induced Noise / Incoherent Light Injection / Coherent Light Injection / Dynamic Single- Mode LD's / Mode Partition Noise / Intensity Noise / インコヒ-レント光注入 / 動的単一モ-ド半導体レ-ザ / モ-ド分配雑音
Research Abstract

In this research, the mode partition characteristics of distributed feedback laser diodes (DFB LD's)are experimentally evaluated, and the noise generation mechanisms are investigated by a computer simulation. The following results are obtained.
1.By observing the transient spectra of DFB LD's with the time resolving spectroscopic method, it is made clear that DFB LD's oscillate in single longitudinal mode even if they are directly modulated at Gb/s.
2.The mode partition noise induced by incoherent reflections is found to increase with the DC bias current. The origin of this noise increase is attributed to the modulation of the threshold of the main mode due to the interference between the reflected light and the light inside of the LD.
3.An experimental setup to control the amplitude and the phase of the coherently reflected light is established. In the spectra of directly modulated DFB LD's, it is found that the short wavelength components are enhanced by the coherent reflections. The measurements and the computer simulations are in progress.

Report

(3 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] A.Takeda: "Effect of Reflected Light on Mode Partition Characteristics of Fabry-Perot Laser Diodes" IEICE Trans.Commun.E75-B. 217-225 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Kawai: "Characteristics of Mode Partition Noise of DFB LD's Induced by Externally Reflected Light" IEICE Trans.Commun.E75-B. 906-913 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Kawai: "Analysis of Transient Spectral Spread of Directly Modulated DFB LD's"" IEICE Trans.Commun.E76-B. (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] A.Takeda, T.Kawai, M.Mori, T.Goto, and A.Miyauchi: "Effect of Reflected Light on Mode Partition Characteristics of Fabry-perot Laser Diodes" IEICE Trans.Commun.E75-B. 217-225 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Kawai, A.Kurihara, M.Mori, T.Goto, A.Miyauchi, and T.Nakagami: "Characteristics of Mode Partition Noise of DFB LD's Induced by Externally Reflected Light" IEICE Trans.Commun.E75-B. 906-913 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Kawai, A.Kurihara, M.Mori, T.Goto, A.Miyauchi, and T.Nakagami: "Analysis of Transient Spectral Spread of Directly Modulated DFB LD's" IEICE Trans.Commun.E76-B. (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] A.Takeda: "Effect of Reflected Light on Mode Partition Characteristics of Fabry-Perot Laser Diodes" IEICE Trans.Commun.E75-B. 217-225 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] T.Kawai: "Characteristics of Mode Partition Noise of DFB LD's Induced by Externally Reflected Light" IEICE Trans.Commun.E75-B. 906-913 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] T.Kawai: "Analysis of Transient Spectral Spread of Directly Modulated DFB LD's" IEICE Trans.Commun.E76-B. (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] A.Takeda: "Effect of Reflected Light on Mode Partition Characteristics of FabryーPerot Laser Diodes" IEICE Trans.Commun.E75ーB. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] T.Kawai: "Measurement of Mode Partition Noise of DFB LD's Induced by Externally Reflected Light" IEICE Trans.Commun.

    • Related Report
      1991 Annual Research Report
  • [Publications] T.Kawai: "On Chirping Measurement of DFB LD's Modulated Directly at Gbit/s" IEICE Trans.Commun.

    • Related Report
      1991 Annual Research Report

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Published: 1991-04-01   Modified: 2016-04-21  

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