SINGLE-MODE OPTICAL FIBER WITH LARGE EFFECTIVE AREA

SINGLE-MODE OPTICAL FIBER WITH LARGE EFFECTIVE AREA

A single-mode fiber with a large effective area comprises a core layer and a cladding layer. The core layer is cladded with an intermediate cladding layer, and a depressed cladding layer is provided outside the intermediate cladding layer. The core layer comprises a first fiber sub core layer having...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: SUN MENGXUN, ZHOU HONGYAN, WANG ZHIYONG, MAO MINGFENG, WANG RUNHAN, LONG SHENGYA
Format: Patent
Sprache:eng
Schlagworte:
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Beschreibung
Zusammenfassung:A single-mode fiber with a large effective area comprises a core layer and a cladding layer. The core layer is cladded with an intermediate cladding layer, and a depressed cladding layer is provided outside the intermediate cladding layer. The core layer comprises a first fiber sub core layer having a radius r1 of 1.5-5 μm and a relative refractive index difference n1 of 0.05-0.22%, and a second sub core layer having a unilateral radial width (r2−r1) of 1.5-5 μm and a relative refractive index difference n2 of 0.15-0.34%, where n1 is less than n2. Accordingly, the optical fiber can reach an effective area equal to or greater than 120 μm2 when the related parameters thereof are optimized.