Optical: systems and elements – Optical amplifier – Optical fiber
Patent
1998-12-30
2000-12-12
Hellner, Mark
Optical: systems and elements
Optical amplifier
Optical fiber
359124, H01S 300
Patent
active
06160660&
ABSTRACT:
An optical fiber amplifier and filtering apparatus and method for a bidirectional wavelength-division-multiplexing (WDM) system having odd and even interleaved channels is disclosed. The apparatus uses optical circulators, in-fiber Bragg gratings, and erbium-doped fiber amplifiers to amplify channels traveling in opposite directions in a WDM system and to filter unwanted ASE and back reflection noise between the channels. Interface circulators positioned at opposite ends of the apparatus respectively receive odd and even channels traveling in opposite directions in the WDM system and pass the channels through an erbium-doped fiber amplifier. Other circulators direct the amplified channels to two series of Bragg gratings that respectively reflect only the odd channels and pass only the even channels or vice versa, thereby filtering ASE and other noise located between the channels. An additional amplifier may boost the channels before they exit the apparatus via the interface circulators.
REFERENCES:
patent: 5260823 (1993-11-01), Payne et al.
patent: 5283686 (1994-02-01), Huber
patent: 5351321 (1994-09-01), Snitzer et al.
patent: 5677786 (1997-10-01), Meli
patent: 5742416 (1998-04-01), Mizrahi
patent: 5748364 (1998-05-01), Meli et al.
patent: 5808787 (1998-09-01), Meli et al.
patent: 5812306 (1998-09-01), Mizrahi
C. Barnard et al., "Bidirectional Fiber Amplifiers", IEEEE Photonics Tech. Ltrs., 4(8) :911-913 (1992).
S. Seikai et al., "Novel Optical Circuit Suitable for Wavelength Division Bidirectional Optical Amplification", Electronics Letters 29 (14) :1268-1270 (1993).
"High Gain, Broadband 1.6.mu.m Er.sup.3+ Doped Silica Fibre Amplifier", Electronics Letters, 26(20) :1645-1646 (1990).
Aina Stefano
Meli Fausto
Piciaccia Stefano
Hellner Mark
Pirelli Cavi E Sistemi S.p.A.
LandOfFree
Bidirectional optical transmission system for dense interleaved does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bidirectional optical transmission system for dense interleaved , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bidirectional optical transmission system for dense interleaved will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-223096