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Multimode optical fiber with low bending losses and reduced cladding effect

A multimode fiber, bending loss technology, applied in the direction of multi-layer core/cladding fiber, cladding fiber, graded index fiber core/cladding fiber, etc., can solve the problem of fiber cladding effect, bending Problems such as high loss and bending loss

Active Publication Date: 2014-06-18
DRAKA COMTEQ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disclosed fiber exhibits a higher than expected bend loss
Furthermore, no mention is made of the cladding effect of the disclosed fibers

Method used

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  • Multimode optical fiber with low bending losses and reduced cladding effect
  • Multimode optical fiber with low bending losses and reduced cladding effect
  • Multimode optical fiber with low bending losses and reduced cladding effect

Examples

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example 2

[0143] For example 2, such as Figure 3-4 As shown, improved OFL bandwidth and external DMD values ​​can be obtained. In particular, the OFL bandwidth of the fiber described in Example 2 can be higher than 6,000 MHz·km (e.g., higher than 10,000 MHz·km), and its external DMD value can be less than 0.3 ps / m (e.g., less than 0.1 ps / m) .

[0144] The advantages of the invention will also be better understood by comparing Example 5, which is an optical fiber according to the invention, with the comparative optical fibers described in Examples 6-7. In contrast to Example 5, the fiber described in Example 6 has the distance r between the outer diameter of its inner cladding and its theoretical central core radius 2 -r 1zero substantially larger than 2 microns. In addition, the outer diameter r of the groove of Example 6 out Greater than 32 microns, especially with an outer diameter of 35 microns. Although Example 6 has low bend loss, Example 6 does not have a low external DMD v...

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Abstract

The present invention embraces an optical fiber that includes a central core having an alpha-index profile with respect to an outer cladding. The optical fiber also includes an inner cladding, a depressed trench, and an outer cladding. Typically, the alpha-index profile of the central core is interrupted at a point having a positive refractive index difference with respect to the outer cladding. The optical fiber achieves reduced bending losses and a high bandwidth with a reduced cladding effect for high-data-rate applications.

Description

technical field [0001] The invention relates to the field of optical fiber transmission, in particular to a multimode optical fiber with reduced bending loss and high bandwidth for high data rate applications. Background technique [0002] Traditionally, an optical fiber (ie, a glass fiber typically surrounded by one or more cladding layers) includes an optical fiber core that transmits and / or amplifies optical signals and an optical cladding that confines the optical signals within the core. Therefore, the refractive index nc of the core is usually greater than the refractive index n of the optical cladding g (ie, n c >ng). [0003] For optical fibers, the refractive index profile is usually classified according to the graphical appearance of the function relating the refractive index to the fiber radius. Traditionally, the distance r from the center of the fiber is shown on the x-axis, and the relationship between the refractive index (at radius r) and the refractive...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/036G02B6/028
CPCG02B6/03627G02B6/0288G02B6/0365
Inventor D·莫林M·比戈-阿斯楚克P·斯拉德K·德容
Owner DRAKA COMTEQ BV