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Single mode optical fibre

A single-mode fiber, fiber technology, applied in clad fibers, multi-layer core/clad fibers, optics, etc., can solve the problems of limiting four-wave mixing nonlinear dispersion, low total waveguide dispersion, etc.

Inactive Publication Date: 2004-05-12
CORNING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For high bit rate systems of WDM, the total dispersion of the waveguide must be extremely low, but not zero, thereby limiting the nonlinear dispersion effect of four wave mixing

Method used

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  • Single mode optical fibre
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Embodiment Construction

[0073] The novel optical fiber described here includes a core region with three segments. These segments are distinguished from each other by the refractive index profile characteristics of a given segment. The three-segment core region provides sufficient flexibility for fiber design to accommodate a wide range of functional requirements. Parameters that can be varied to provide specific fiber performance are:

[0074] Δ% for each of the three domains;

[0075] the radius of each of the three regions; and

[0076] The shape of the refractive index profile for each of the three regions.

[0077] The properties of the novel fiber described here are: positive total dispersion in the specified wavelength range of 1530nm to 1570nm to counteract the non-linear effect of SPM; very low dispersion slope in the specified wavelength range to facilitate WDM operation ; and zero dispersion outside the specified wavelength to limit dispersion due to four-wave mixing. Positive dispersi...

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Abstract

A single mode optical waveguide fiber having a positive total dispersion is disclosed. The novel waveguide fiber has a core region comprising three distinct segments. Studies of this novel waveguide, wherein properties are calculated as various ones of the core region parameters are changed, show that the waveguide satisfies the requirements of a fiber in a high bit rate, long regenerator spacing system. The novel waveguide design is relatively simple to manufacture and maintains its functional properties at tight tolerances when the core region parameters are varied over a prescribed range. This high performance waveguide limits self phase modulation and four wave mixing, facilitates wavelength division multiplexing, and is compatible with optical amplifiers.

Description

[0001] This application is a divisional application with application number 96121004.4. technical field [0002] The present invention relates to a single mode optical fiber in which the total dispersion is kept positive throughout the length of the fiber. Background technique [0003] The dispersion notation convention commonly used in the prior art is to label the dispersion of a waveguide as positive if the shorter wavelength signal travels at a higher velocity than the longer wavelength signal in the waveguide. [0004] Due to the high data rates and the need for long regenerator spacing, research has intensified on high-performance optical fibers designed for long-distance, high-bit-rate communications. Another requirement is that the optical fiber should match the optical amplifier. Generally, the optical amplifier gain curve is the best in the wavelength range from 1530nm to 1570nm. [0005] With the increase in waveguide information capacity due to wavelength divisi...

Claims

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Application Information

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IPC IPC(8): G02B6/028G02B6/036G02B6/10H04B10/12H04J14/02
CPCG02B6/02009G02B6/03644G02B6/03611G02B6/02242G02B6/0286
Inventor 戴维·金尼·史密斯
Owner CORNING INC
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