Browsing by Subject "Silica fibers"

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    Chalcogenide microresonators tailored to distinct morphologies by the shaping of glasses on silica tapers
    (OSA - The Optical Society, 2017) Aktaş, O.
    Production of chalcogenide (As2Se3) microresonators in sphere, loop, and bottle morphologies by the shaping of glasses at appropriate temperatures between cleaved silica tapers is reported. The quality factors exceed QS = 6.2×105, QB = 6.7 × 105, and QL = 1.6 × 104 for the sphere, bottle, and loop microresonators, respectively. All-optical thermally assisted tuning with a rate of 0.61 nm/mW is demonstrated for a bottle microcavity pumped via a silica taper at a wavelength of 670 nm. This technique enables practical and robust in situ production of chalcogenide microresonators thermally spliced to silica fibers in several morphologies with a wide tuning range of size.
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    ItemOpen Access
    Higher order mode analysis in frequency selective negative curvature fibers
    (Optica Publishing Group, 2024-08-01) Siddiqui, Muhammad Zain; Akosman, Ahmet E.; Ordu, Mustafa
    A novel negative curvature hollow-core fiber is numerically designed capable of filtering specific frequencies. The six-tube silica fiber strongly favors fundamental mode transmission over higher order modes despite uneven positioning of cladding elements.