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Single-mode optical fibre having an enlarged effective area

A single-mode fiber, fiber core technology, applied in the direction of multi-layer core/cladding fiber, cladding fiber, light guide, etc., can solve the problems of undescribed fiber, unsatisfactory, unsatisfactory dispersion slope, etc.

Active Publication Date: 2014-04-16
DRAKA COMTEQ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cut-off wavelength value of this fiber is too high to meet the G.652 standard
[0015] EP-A-1 978 383 describes a 2 The effective area of ​​the fiber, but its cut-off wavelength higher than 1260nm, the zero dispersion wavelength and the dispersion slope at the zero dispersion wavelength do not meet the G.652 standard
[0016] The identified prior art literature does not describe having a wavelength greater than 100 μm at a wavelength of 1550 nm 2 Optical fiber with an effective area that meets the constraints of the G.652 standard

Method used

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  • Single-mode optical fibre having an enlarged effective area
  • Single-mode optical fibre having an enlarged effective area
  • Single-mode optical fibre having an enlarged effective area

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Embodiment Construction

[0034] will combine figure 1 with figure 2 To describe the optical fiber of the present invention, figure 1 with figure 2 Each represents a set profile, ie a theoretical profile of an optical fiber which is actually obtained after fiber drawing from a preform, which can have a slightly different profile.

[0035] Typically, the central core and the first and second inner cladding are obtained by CVD-type deposition in a quartz tube, while the optical outer cladding is usually formed by overcladding the tube with natural or doped quartz, but also It can be obtained by any other deposition technique (VAD or OVD).

[0036] According to the first embodiment ( figure 1 ), the transmission fiber according to the present invention comprises: a central core with a refractive index difference Δn between it and an optical outer cladding serving as an optical cladding 1 ; It is equivalent to the first inner cladding layer of the intermediate cladding layer, and there is a refracti...

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Abstract

A single-mode optical fibre comprises a central core (r 1 , ”n 1 ), a first inner cladding (w 2 , ”n 2 ), a second inner cladding (w 3 , ”n 3 ) and an outer cladding. The optical fibre has an effective area at a wavelength of 1550 nm greater than or equal to 100 µm 2 . The optical fibre also has a cable cut-off wavelength less than 1260 nm; a zero chromatic dispersion wavelength comprised between 1300 nm and 1324 nm; and a dispersion slope less than 0.092 ps / nm 2 -km. The optical fibre has an effective area greater than 100 µm 2 while complying with the G.652 standard, with the exception of the specifications on the mode field diameter at a wavelength of 1310 nm.

Description

technical field [0001] The present invention relates to the field of optical fiber transmission, and more particularly, to line optical fibers with enlarged effective area. Background technique [0002] For optical fibers, the refractive index profile is usually classified according to the shape of the graph relating the refractive index as a function of the fiber radius. In the standard method, the distance r to the center of the fiber is shown on the x-axis. On the y-axis, the difference between the refractive index (at radius r) and the refractive index of the fiber cladding is shown. Thus, the terms "step", "trapezoidal", "triangular" or "alpha" refractive index profile are used to describe a profile having a profile having a step-shaped, trapezoidal, triangular or alpha-shaped profile, respectively. These curves typically represent a theoretical or set profile for the fiber, while manufacturing constraints for the fiber may result in slightly different profiles. [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/036
CPCG02B6/02266G02B6/02019G02B6/0365G02B6/03644
Inventor P·西亚尔D·莫兰L-A·德蒙莫里永M·比戈-阿斯特吕克S·里夏尔
Owner DRAKA COMTEQ BV