Optical repeaters for single-and multi-wavelength operation with

Details Optical repeaters for single-and multi-wavelength operation with Optical repeaters for single-and multi-wavelength operation with

1996-05-30

1999-06-29

Pascal, Leslie

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359130, 359339, 359348, 359349, 385 37, H04B 1017

Patent

active

059176350

ABSTRACT:
An optical repeater is described which integrates an erbium doped optical fiber amplifier (EDFA) with a dispersion equalizer (DE) based on fiber gratings. The dispersion equalizer is based on parallel connection of two fiber gratings for single carrier wavelength operation, and on parallel connection of a cascade of two fibre grating branches, each carrying a plurality grating elements chirped for different wavelengths, for WDM operation at a plurality of wavelengths.
The use of two gratings sections for each wavelength improves the optical bandwidth of the equalizer compared with single grating designs, doubling the effective bandwidth. Further, the grating DE is disposed between two fiber amplifier sections which share a single pump laser. Thus, this arrangement provides dispersion compensation and loss compensation in an optical repeater of lower cost, and smaller size, compared to a system of similar performance configured using discrete components.

REFERENCES:
patent: 4953939 (1990-09-01), Epworth

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