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RARE EARTH DOPED SINGLE POLARIZATION DOUBLE CLAD OPTICAL FIBER AND A METHOD FOR MAKING SUCH FIBER

2025-06-20 04:483550下载
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An optical fiber, comprising : (i) a rate 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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