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Rare earth doped single polarization double clad optical fiber and a method for making such fiber

2025-06-18 18:573680下载
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An optical fiber, comprising : (i) a rare earth doped silica based elongated core with a first refractive index (n1) with an aspect ratio of 1 : 5 to 1; (ii) a silica based moat abutting and at least substantially surrounding the core, the moat having a refractive index n2, wherein n2n3; and n3>n2; (iv) a silica based outer cladding surrounding said inner cladding, the outer cladding having a fourth refractive index (n4), such that n4
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