Optical: systems and elements – Optical amplifier – Optical fiber
Patent
1998-05-15
2000-04-11
Hellner, Mark
Optical: systems and elements
Optical amplifier
Optical fiber
359349, H01S 300
Patent
active
060494174
ABSTRACT:
A wide band optical amplifier employing a split-band architecture in which an optical signal is split into several independent sub-bands which then pass in parallel through separate branches of the optical amplifier. Each branch may be optimized for the sub-band that traverses it. The independent sub-bands are combined before output, resulting in a broad band, high efficiency amplifier. Alternative, hybrid split-band amplifiers are described. As a result of their desirable characteristics, these wide band optical amplifiers may be used in dense WDM communications systems.
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patent: 5801858 (1998-09-01), Roberts et al.
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J. F. Massicott et al, "Low Noise Operation of Er.sup.3+ Doped Silica Fibre Amplifer Around 1.6 .mu.m", Electronics Letters, vol. 28, No. 20, Sep. 24, 1992, pp. 1924-1925.
P.F. Wysocki et al, "Erbium-Doped Fiber Amplifer Flattened Beyond 40 nm Using Long-Period Grating", Conference On Optical Fiber Communications, Technical Digest, Postconference Edition, 1997 OSA Technical Digest Series, vol., 6, Dallas, TX, USA, 16-21, pp. 375-378.
A. K. Srivastava et al, "32.times.10 Gb/s WDM Transmission Over 640 km Using Broadband, Gain-Flattened Erbium-Doped Silica Fiber Amplifiers", Conference on Optical Fiber Communications, Technical Digest, Postconference Edition, 1997 OSA Technical Digest Series, vol. 6, Dallas, TX, USA, 16-21, pp. 439-442, 1997.
Y. Sun et al, "An 80 nm Ultra Wide Band EDFA With Low Noise Figure And High Output Power", 11.sup.th International Conference On Integrated Optics and Optical Fibre Communications 23.sup.rd European Conference On Optical Communications, IOOC-ECE97, Post Deadline Papers, vol. 5., pp. 69-72, 1997 .
Srivastava Atul Kumar
Sulhoff James William
Sun Yan
Zyskind John Lehrer
Brosemer J. J.
Hellner Mark
Lucent Technologies - Inc.
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