Wideband erbium doped fiber amplifier capable of minimizing...

Details Wideband erbium doped fiber amplifier capable of minimizing... Wideband erbium doped fiber amplifier capable of minimizing...

2005-06-07

2005-06-07

Hellner, Mark (Department: 3663)

Optical: systems and elements

Optical amplifier

Beam combination or separation

C359S341100

Reexamination Certificate

active

06903868

ABSTRACT:
The inventive fiber amplifier comprises: (a) a first Er-doped fiber provided with a first light-pumping source via a first pump combiner to amplify input optical signals; (b) a second Er-doped fiber provided with a second light-pumping source via a second pump combiner to amplify input L-band optical signals; (c) a C/L splitter provided in the downstream of the first Er-doped fiber for splitting the optical signals into C- and L-bands, respectively, during passage through the C/L splitter; (d) a reflector for transmitting the L-band optical signals split in the C/L splitter toward the second Er-doped fiber and reflecting the transmitted L-band optical signals to flow back toward the second Er-doped fiber; (e) a circulator for introducing the L-band optical signals which are amplified after backward flow from the reflector toward another direction and preventing the backward flow of ASE generated during amplification toward the first Er-doped fiber; and, (f) a C/L combiner for combining the C-band optical signals split in the C/L splitter and the L-band optical signals introduced from the circulator.

REFERENCES:
patent: 6480328 (2002-11-01), Shimojoh
patent: 6483636 (2002-11-01), Sugaya et al.
patent: 6621627 (2003-09-01), Willner et al.
patent: 6646796 (2003-11-01), Song et al.
patent: 6674570 (2004-01-01), Song et al.
patent: 02003283021 (2003-10-01), None

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