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Multimode fiber optical fiber transmission system with offset launch single mode long wavelength vertical cavity surface emitting laser transmitter

  • US 7,231,114 B2
  • Filed: 05/22/2004
  • Issued: 06/12/2007
  • Est. Priority Date: 05/21/2003
  • Status: Active Grant
First Claim
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1. A transmitter for use in a multimode fiber communication system, said transmitter comprising:

  • an optical source comprising a single mode, long wavelength vertical cavity surface emitting laser outputting optical radiation in a substantially circular beam spot,said laser having a symmetric numerical aperture of about 0.1 and a beam spot diameter of between about 3 μ

    m to about 10 μ

    m; and

    a collecting element for collecting said optical radiation output from the laser and directing said optical radiation onto the end face of a multimode fiber,said laser and said collecting element being cooperatively positioned to direct said optical radiation onto the core of the multimode fiber offset from the optical axis of said core.

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