Modal noise simulations due to high frequency VCSEL numerical aperture fluctuations

Shanalyn A. Kemme, Raymond K Kostuk

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We have experimentally identified and characterized two dynamic components of a VCSEL/multimode optical fiber link: 1) a high temporal frequency fluctuation of the VCSEL's numerical aperture (NA) and, 2) source power spectrum shift in time (chirp) both upon ac modulation. We use these variables of the excitation irradiance distribution at a fiber input to simulate the resulting modal noise; without the typical assumptions that all fiber modes are equally filled and all relative fiber mode delays are equally probable. Results indicate that fluctuations in the NA can generate significant modal noise at the fiber output. On the other hand, source chirp, in the presence of mode selective loss, is only moderately effective in generating modal noise. Moreover, since chirping increases with the VCSEL's series resistance, it's significance will diminish as design efforts to decrease the potential drop across the VCSEL are successful.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsR.T. Chen, J.P. Bristow
Pages45-52
Number of pages8
Volume3288
DOIs
Publication statusPublished - 1998
EventOptoelectronic Interconnects V - San Jose, CA, United States
Duration: Jan 28 1998Jan 29 1998

Other

OtherOptoelectronic Interconnects V
CountryUnited States
CitySan Jose, CA
Period1/28/981/29/98

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Keywords

  • Fiber coupling
  • Fiber optics
  • Modal noise
  • Optical interconnects
  • VCSELs

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Kemme, S. A., & Kostuk, R. K. (1998). Modal noise simulations due to high frequency VCSEL numerical aperture fluctuations. In R. T. Chen, & J. P. Bristow (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 3288, pp. 45-52) https://doi.org/10.1117/12.307588