Feedback-type optical fiber amplifier using hybrid pumping light

Details Feedback-type optical fiber amplifier using hybrid pumping light Feedback-type optical fiber amplifier using hybrid pumping light

1997-12-29

2000-05-16

Moskowitz, Nelson

Optical: systems and elements

Optical amplifier

Optical fiber

359134, 359160, 372 6, H01S 306, H01S 3094, G02B 628

Patent

active

060645156

ABSTRACT:
A feedback-type optical fiber amplifier using hybrid pumping light beams disclosed, including: an optical line through which an optical signal is propagated; a plurality of rare-earth-doped fibers, doped with a predetermined rare earth ion, being coupled to the optical line in series; a plurality of pumping light sources for outputting pumping light beams having wavelengths different from each other; a plurality of optical coupling means for coupling the pumping light beams to the optical line; and feedback means for dividing the pumping light beam outputted through at least one of the rare-earth-doped fibers, and looping it back to corresponding rare-earth-doped fiber as its input. Therefore, the length of fiber constructing the optical fiber amplifier is reduced, and the amplification efficiency is improved.

REFERENCES:
patent: 4712075 (1987-12-01), Snitzer
patent: 5392153 (1995-02-01), Delavaux
patent: 5745283 (1998-04-01), Inagaki et al.
patent: 5801878 (1998-09-01), Bourret et al.
patent: 5808786 (1998-12-01), Shibuya

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