Control of gain and dispersion of a signal in an optical medium

Optical: systems and elements – Optical amplifier – Optical fiber

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H01S 300

Patent

active

055305849

ABSTRACT:
By using a pumped erbium doped fibre (EDF) cascaded with a non-saturable absorbing fibre (NSAF), an amplifier is provided with a desired flat uniform output response for a input signals with different intensities at a plurality of wavelengths. Furthermore, from a commercial standpoint, the amplifier is relatively inexpensive and simple to fabricate, being compatible with standard telecommunication fibre. With this particular invention, a previously recognized undesired characteristic of NSAF, its poor amplification qualities, are now being used to an advantage.

REFERENCES:
patent: 5117303 (1992-05-01), Desurvire et al.
patent: 5177634 (1993-01-01), Way
patent: 5363234 (1994-11-01), Newhouse et al.
patent: 5379148 (1995-01-01), Blondel et al.

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