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Single mode propagation in fibers and rods with large leakage channels

  • US 20060263024A1
  • Filed: 05/20/2005
  • Published: 11/23/2006
  • Est. Priority Date: 05/20/2005
  • Status: Active Grant
First Claim
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1. An optical fiber for propagating at least one lower order mode having a wavelength, λ

  • , while limiting propagation of higher order modes having a wavelength, λ

    , by providing said higher order modes with a higher loss than said at least one lower order mode at said wavelength, λ

    , said optical fiber comprising;

    a first cladding region comprising one or more cladding features; and

    a core region surrounded by the said first cladding region, said cladding features configured to substantially confine propagation of said lower order modes to said core region, said core region having a width of at least about 20 micrometers, wherein said core region is configured to provide a loss for said higher order modes of at least about 0.5 dB.

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