• DocumentCode
    1115247
  • Title

    Evaluation of modal noise in multimode fiber-optic systems

  • Author

    Kanada, Tetsuya

  • Author_Institution
    Nippon Telegraph and Telephone Public Corp., Yokosuka, Japan
  • Volume
    2
  • Issue
    1
  • fYear
    1984
  • fDate
    2/1/1984 12:00:00 AM
  • Firstpage
    11
  • Lastpage
    18
  • Abstract
    Modal noise at fiber connecting points is studied theoretically and experimentally. Simple formulas for calculating modal-noise power, noise bandwidth, and nonlinear distortions are obtained by introducing a visibility concept. Modal noise for multimode operating LD is also analyzed. These theoretical results are applied to high-bit-rate digital systems and analog systems using direct IM. Then, it is shown that a 3-dB connection loss limits effective signal-to-noise ratio (SNR) to 22 dB in high-bit-rate digital systems, and that in analog systems, the SNR is improved more than 20 dB by using a superimposed pulse modulation with a frequency that is 100 times the baseband signal bandwidth.
  • Keywords
    Noise; Optical fiber communication; Adaptive optics; Bandwidth; Digital systems; Fiber nonlinear optics; Joining processes; Nonlinear distortion; Optical distortion; Optical noise; Signal to noise ratio; Speckle;
  • fLanguage
    English
  • Journal_Title
    Lightwave Technology, Journal of
  • Publisher
    ieee
  • ISSN
    0733-8724
  • Type

    jour

  • DOI
    10.1109/JLT.1984.1073569
  • Filename
    1073569
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1115247