FIBER OPTICS TRANSMISSION LINE

Even if a fiber fuse phenomenon occurs to start fire spreading, the fire spreading is shut off. A graded index fiber (GIF) (3) is inserted between transmission-use single mode fibers (SMF) (2a, 2b) on a fiber optics transmission line (1). The GIF (3) is so designed that its mode field diamet er (MFD...

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Bibliographische Detailangaben
Hauptverfasser:	MORISHITA, YUICHI, FUJITA, JIN, MORITA, KAZUAKI
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS TRANSMISSION
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	Even if a fiber fuse phenomenon occurs to start fire spreading, the fire spreading is shut off. A graded index fiber (GIF) (3) is inserted between transmission-use single mode fibers (SMF) (2a, 2b) on a fiber optics transmission line (1). The GIF (3) is so designed that its mode field diamet er (MFD) gradually increases from a light entry side. The MFD exhibits a maximu m value at a location 1/4 of a pitch from the end of the GIF (3). A GIF (3a) i s disposed on the light entry side. A GIF (3b) having an MFD gradually decreasing is disposed on the opposite side of the GIF (3a). The GIF (3b) is disposed on the light exit side. The lengths of the GIF (3a) and the GIF (3b ) are 1/4 of a pitch. The length of the GIF (3) formed by connecting the both is 1/2 of a pitch.