OPTICAL FIBER

To provide an optical fiber grating that suppresses the gradual increase in transmission loss, and an optical fiber suitable for manufacturing the optical fiber grating.SOLUTION: An optical fiber according to one embodiment comprises a core having a single-peak type inclined refractive index profile...

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Bibliographic Details
Main Authors SHIGEHARA MASAKAZU, YAMAZAKI MASAYUKI, NAGANO SHIGEHIRO
Format Patent
LanguageEnglish
Japanese
Published 02.11.2023
Subjects
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Summary:To provide an optical fiber grating that suppresses the gradual increase in transmission loss, and an optical fiber suitable for manufacturing the optical fiber grating.SOLUTION: An optical fiber according to one embodiment comprises a core having a single-peak type inclined refractive index profile, an inner cladding surrounding the core, and an outer cladding surrounding the inner cladding. The inner cladding and the outer cladding have a refractive index lower than a maximum refractive index of the core. A photosensitive region formed by the core and the inner cladding includes a photosensitive material. The inner cladding has an outer diameter that is one or more times and two or less times larger than an MFD of LP01 mode at a wavelength band of 1310 nm.SELECTED DRAWING: Figure 9 【課題】透過損失の緩慢な増加が低減された光ファイバグレーティングおよび該光ファイバグレーティングを製造するのに好適な光ファイバを提供する。【解決手段】 一実施形態に係る光ファイバは、単峰型の傾斜屈折率プロファイルを有するコアと、コアを取り囲む内クラッドと、内クラッドを取り囲むそとクラッドと、を備える。内クラッドおよび外クラッドは、コアの最大屈折率よりも低い屈折率を有する。コアおよび内クラッドで構成された感光性領域は、感光性材料を含む。内クラッドは、波長１３１０ｎｍ帯におけるＬＰ０１モードのＭＦＤの１倍以上２倍以下の外径を有する。【選択図】図９
Bibliography:Application Number: JP20230148600