Multi-core optical fiber

A multi-core fiber, fiber core technology, applied in multi-core fiber, cladding fiber, optics, etc., to reduce transmission loss, reduce nonlinearity, and reduce crosstalk.

Inactive Publication Date: 2011-09-21
SUMITOMO ELECTRIC IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, in the PON system in which multiple subscribers share one optical fiber by inserting multi-level optical splitting elements as described above, there are actually congestion control (Congestion Control) and guaranteed reception dynamic range for future increase in transmission capacity. and other technical topics

Method used

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no. 1 Embodiment approach

[0032] figure 1 It is a diagram showing a schematic configuration of the first embodiment of the multi-core optical fiber according to the present invention. in addition, figure 2 It is a diagram showing the cross-sectional structure of the multi-core optical fiber according to the first embodiment. figure 1 The multicore fiber 100 is along the central axis A x The optical fiber extending (a predetermined axis coincident with the longitudinal direction of the multi-core optical fiber 100) has: a plurality of cores 111-113; x The orthogonal plane has a circular cross section; and the cladding part 130 is provided on the outer periphery of the cladding. Disposed within the cladding 120 is a central core 111 disposed at the center of the cladding and extending along the central axis A x extension; and 2 kinds of peripheral cores 112, 113, which are arranged at different positions from the central core 111, and along the central axis A x extend. In addition, the periphera...

no. 2 Embodiment approach

[0039] image 3 It is a diagram showing the cross-sectional structure of the second embodiment of the multi-core optical fiber according to the present invention. The multi-core optical fiber 200 according to the second embodiment is different from the multi-core optical fiber 100 according to the first embodiment ( figure 2 ) are different in the following respects. That is, the relative refractive index differences between the central core and the peripheral cores are equal to each other, and the diameters of adjacent peripheral cores are different from each other. In addition, in image 3 in, with figure 2 Similarly, the central axis A of the multi-core fiber 200 is shown x Orthogonal plane consistent sections.

[0040] Specifically, the multi-core optical fiber 200 according to the second embodiment includes: a plurality of cores 114 to 116; a cladding 120 covering the plurality of cores 114 to 116; and a cladding 230 provided on the outer periphery of the cladding...

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Abstract

The present invention relates to a multi-core optical fiber having a structure for reducing transmission loss and nonlinearity. The multi-core optical fiber comprises plural cores extending along a center axis direction, and a cladding surrounding the peripheries of the plural cores. The cladding is comprised of silica glass doped with fluorine, and each of the plural cores is comprised of silica glass doped with chlorine or pure silica glass.

Description

technical field [0001] The invention relates to a multi-core optical fiber. Background technique [0002] Currently, in order to provide FTTH (Fiber To The Home) services that enable optical communications between one sending station and multiple subscribers, for example, Figure 8 As shown, a so-called PON (Passive Optical Network) system is implemented, which enables each joiner to share one optical fiber by inserting a multi-stage optical splitter. [0003] which is, Figure 8 The PON system shown has: a terminal station 1 (sending station), which serves as the final relay station of an existing communication system such as the Internet; and an optical fiber network, which is laid between the terminal station 1 and a subscriber's house 2 (subscriber). The optical fiber network is composed of a splice box (including an optical splitter 30 ) installed as a branch point, an optical communication line 12 from the terminal station 1 to the splice box, and an optical communicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02
CPCG02B6/0365G02B6/02042
Inventor 屉冈英资樽稔树永岛拓志
Owner SUMITOMO ELECTRIC IND LTD
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