Dispersion compensating fiber and optical amplifier using same

Optical: systems and elements – Optical amplifier – Optical fiber

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359124, 359161, H01S 300

Patent

active

061633984

ABSTRACT:
With a dispersion compensating fiber 1, a dispersion compensating fiber material having a dispersion characteristic which is opposite to a dispersion characteristic of an optical transmission path, is formed with a rare-earth element doped region limited to an output side predetermined range of the full length of the fiber, while an input side region 1n is not doped with a rare-earth element. Due to this construction, signal light is amplified inside the doped region 1d even with low power excitation light, so that insertion losses in the dispersion compensating fiber are compensated. Moreover, by providing the dispersion compensating fiber between two stage optical amplifying sections, the noise factor for the overall optical amplifying section is reduced.

REFERENCES:
patent: 5361319 (1994-11-01), Antos et al.
patent: 5887093 (1999-03-01), Hansen et al.
patent: 5995694 (1999-11-01), Akasaka et al.
patent: 6031955 (2000-02-01), Muhasa et al.

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