Single mode optical fibre

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...

AI Technical Summary

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

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