Optical: systems and elements – Optical amplifier – Correction of deleterious effects
Reexamination Certificate
2008-04-09
2010-12-07
Bolda, Eric (Department: 3663)
Optical: systems and elements
Optical amplifier
Correction of deleterious effects
C359S341300, C359S341500
Reexamination Certificate
active
07848014
ABSTRACT:
An optical fiber amplifier apparatus and optical signal amplification method are provided. In one example, the amplifier apparatus comprises an optical combiner that is configured to receive an input optical signal to be amplified and a pump light beam. The optical combiner combines for output the input optical signal and the pump light beam. A first cladding pumped optical fiber in which Erbium is the only optically active dopant is coupled to the optical combiner to receive the pump light beam and the input optical signal. The first cladding pumped optical fiber pre-amplifies the input optical signal and passes the pre-amplified input optical signal and power of the pump light beam not absorbed by the first cladding pumped optical fiber. A second cladding pumped optical fiber is provided that is coupled to the first cladding pumped optical fiber. Erbium and Ytterbium are optically active dopants in the second cladding pumped optical fiber. The second cladding pumped optical fiber absorbs power of the pump light beam that was not absorbed by the first cladding pumped optical fiber to further amplify the pre-amplified input optical signal to produce an output amplified optical signal that is a desired amplified version of the input optical signal.
REFERENCES:
patent: 4815079 (1989-03-01), Snitzer et al.
patent: 5087108 (1992-02-01), Grasso et al.
patent: 5530710 (1996-06-01), Grubb
patent: 5532870 (1996-07-01), Shigematsu et al.
patent: 5731892 (1998-03-01), DiGiovanni et al.
patent: 5790722 (1998-08-01), Minden et al.
patent: 5930030 (1999-07-01), Scifres
patent: 5937134 (1999-08-01), DiGiovanni
patent: 6411762 (2002-06-01), Anthon et al.
patent: 6487006 (2002-11-01), Chen
patent: 6583925 (2003-06-01), Delavaux et al.
patent: 2001/0022884 (2001-09-01), Bayart et al.
patent: 2002/0012163 (2002-01-01), Zanoni et al.
patent: 2002/0085803 (2002-07-01), Zarris et al.
patent: 2002/0159736 (2002-10-01), Dejneka et al.
patent: 2003/0081892 (2003-05-01), Ghera et al.
patent: 2007/0091948 (2007-04-01), Di Teodoro et al.
International Search Report—3 pgs., May 12, 2009, Cisco Technology, Inc.
Written Opinion—5 pgs., May 13, 2009, Cisco Technology, Inc.
Z. G. Lu et al., “A hybrid fiber amplifier with 36.9-dBm output power and 70-dB gain,” Photonic Systems, Institute for Microstructural Sciences, National Research Council, M-50, 1200 Montreal Road, Rm. 303, Ottawa, ON, Canada K1A 0R6, Optics Communications 256 (2005) 352 357, published by Elsevier B.V.
P. Bousselet et al., “+ 30 dBm output power from a cladding-pumped Yb-free EDFA for L band applications,” Alcatel Research & Innovation, Marcoussis, France, Copyright 2001 Optical Society of America.
P. Bousselet et al., “+33 dBm output power from a full C-band cladding diode-pumped EDFA,” Alcatel Research & Innovation, Marcoussis, France.
J. A Minelly et al., “Yb-free high energy double-clad Er fiber amplifier,” OAA 2004, Post-deadline session, Jun. 29th, San Francisco, CA.
Hart Timothy
Keur Michael R.
Maton Peter
Sweeney Kevin L.
Bolda Eric
Cisco Technology Inc.
Tarolli, Sundheim Covell & Tummino LLP
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