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TRIPLE-SHEATHED MONOMODE OPTICAL FIBER

  • US 20140193127A1
  • Filed: 04/24/2012
  • Published: 07/10/2014
  • Est. Priority Date: 04/26/2011
  • Status: Active Grant
First Claim
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1. Monomode optical fiber (11, 21, 31) comprising, from center to periphery:

  • a monomode core (12, 22, 32) doped at least partly with a rare earth,an optically inactive intermediate sheath (13, 23, 33),a multimode pumping sheath (14, 24, 34), andan outer sheath (15, 25, 35),wherein the intermediate sheath (13, 23, 33)is formed by assembling longitudinal elements (13A, 23A, 33A and 33B), andcomprises a first optical material with a refractive index that differs from the refractive index of said monomode core by at most 10

    3
    , and a second optical material with a refractive index that differs from the refractive index of said monomode core by at least 10

    3
    .

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