MULTI-MODE OPTICAL FIBER

To provide a multi-mode optical fiber in which group delay spread (GDS) is reduced in a ring core type fiber (RCF) structure.SOLUTION: The multi-mode optical fiber comprises: a clad having a constant refractive index; a core that is within the clad and has a constant and greater refractive index tha...

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Main Authors MORI TAKAYOSHI, SAITO KUNIMASA, FUJISAWA TAKESHI, IMADA RYOTA, YAMASHITA YOKO, NAKAJIMA KAZUHIDE, SAKAMOTO YASUSHI, SATO TAKANORI
Format Patent
LanguageEnglish
Japanese
Published 22.05.2023
Subjects
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Summary:To provide a multi-mode optical fiber in which group delay spread (GDS) is reduced in a ring core type fiber (RCF) structure.SOLUTION: The multi-mode optical fiber comprises: a clad having a constant refractive index; a core that is within the clad and has a constant and greater refractive index than that of the clad; and an inner circle layer that is within the core and has a smaller refractive index than the core. The central axis of the inner circle layer is decentered from the central axis of the core.SELECTED DRAWING: Figure 1B 【課題】本開示は、数モード光ファイバにおいて、リングコア型ファイバ（ＲＣＦ）の構造で群遅延広がり（ＧＤＳ）を低減することを目的とする。【解決手段】本開示は、屈折率が一定のクラッドと、前記クラッド内に、屈折率が一定で、前記クラッドの屈折率よりも大きいコアと、前記コア内に、前記コアよりも屈折率の小さい内円層と、を備え、前記内円層の中心軸が前記コアの中心軸に対して偏心していることを特徴とする数モード光ファイバである。【選択図】図１Ｂ
Bibliography:Application Number: JP20210182962