Bending-resistant multimode fiber

Abstract

The invention relates to a bending-resistant multimode fiber comprising a core layer and a cladding. The refractive index profile of the core is in [alpha] power exponent function distribution. The bending-resistant multimode fiber is characterized in that the cladding successively comprises, from inside to outside, an inner cladding, a first sunk cladding, a second sunk cladding, and an outer cladding; the core layer has a distribution index [alpha] from 1.9 to 2.2, a radius R1 from 23 to 27[mu]m, and a maximum relative index of refraction [delta]1 from 0.9 to 1.2%; the inner cladding has a radius R2, a unilateral radial thickness R2-R1 from 0 to 6.0[mu]m, a relative index of refraction difference [delta]2 from -0.3 to 0.03%; the first sunk cladding has a radium R3, a unilateral radial thickness R3-R2 from 2.5 to 6.0[mu]m, and a relative index of refraction difference [delta]3 from -0.6 to -0.2%; the second sunk cladding has a radium R4, a unilateral radial thickness R4-R3 from 6.0 to 10.0[mu]m, and a relative index of refraction difference [delta]4 from -0.3 to -0.2%; and the outer cladding is a pure silicon dioxide glass layer. The bending-resistant multimode fiber has excellent bending resistance and broad bandwidth performance.

Description

technical field [0001] The invention relates to a bending-resistant multimode optical fiber, which has excellent bending resistance and high bandwidth performance, and belongs to the technical field of optical communication. Background technique [0002] With the continuous development of science and technology, China has entered the era of rapid information development of optical fiber broadband and multi-service integration. The integrated telecommunication network, radio network and Internet can carry a variety of information services, and can provide users with various services such as making calls, surfing the Internet and watching TV. In particular, the introduction of concepts such as cloud computing and the Internet of Things in recent years has brought a tsunami-like data impact to existing networks. This will definitely speed up the construction and popularization of applications such as data centers, enterprise computer rooms, storage area networks (SAN), network...

AI Technical Summary

Problems solved by technology

However, if the sink structure is too deep, it will deteriorate the bandwidth and DMD performance of the fiber

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