PHOTONIC LANTERNS COMPRISING OPTICAL FIBERS HAVING UP-DOWN DOPED CLADDINGS
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United States of America Patent
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Issued Date -
Oct 17, 2024
app pub date -
Jul 28, 2022
filing date -
Jul 28, 2022
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Abstract
A photonic lantern includes three or more optical fibers housed within a glass capillary, each optical fiber includes a core and a cladding. The photonic lantern tapers between a first and second end such that a diameter of the glass capillary is greater at the first end than the second end and the cladding of at least two of the three or more optical fibers comprises an up-down doped cladding doped with a dopant combination that includes an up-dopant and a down-dopant. The up-dopant increases and the down-dopant decreases the effective refractive index of the up-down doped cladding. The dopant combination decreases a material viscosity of the up-down doped cladding such that a difference in the effective refractive index between a silica cladding and the up-down doped cladding is greater in a tapered region and at the second end than at the first end.
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