Optical: systems and elements – Optical amplifier – Correction of deleterious effects
Reexamination Certificate
2004-08-11
2009-10-27
Bolda, Eric (Department: 3663)
Optical: systems and elements
Optical amplifier
Correction of deleterious effects
C359S333000, C359S341300
Reexamination Certificate
active
07609437
ABSTRACT:
An optical amplifier apparatus capable of dealing with different wavelength bands and capable of outputting an amplified light with reduced noise for any one of the wavelength bands. In a case of amplifying a light of C-band, terminals (51,52) of an optical switch (50) are connected to each other. An incident light is amplified by a first front-end optical fiber amplifier (12) and a first back-end optical fiber amplifier (18). The amplified light passes via the terminals (51,52) and through a back-end WDM coupler (36) and goes out of the optical amplifier apparatus (1). In a case of amplifying a light of L-band, terminals (51,54) of the optical switch (50) are connected to each other, while terminals (52,53) thereof are connected to each other. An incident light is amplified by the first front-end optical fiber amplifier (12) and first back-end optical fiber amplifier (18), passing via the terminals (51,54), thereafter being further amplified by a second front-end optical fiber amplifier (22) and a second back-end optical fiber amplifier (28). The thus amplified light then passes via the terminals (53,52) and through the back-end WDM coupler (36) and goes out of the optical amplifier apparatus (1).
REFERENCES:
patent: 5115338 (1992-05-01), DiGiovanni et al.
patent: 6049416 (2000-04-01), Srivastava et al.
patent: 6381063 (2002-04-01), Liu
patent: 6535331 (2003-03-01), Shiota et al.
patent: 6583923 (2003-06-01), Rapp
patent: 6671085 (2003-12-01), So et al.
patent: 6891981 (2005-05-01), Price et al.
patent: 2001/0033411 (2001-10-01), Shiota et al.
patent: 2004/0001248 (2004-01-01), Grubb et al.
patent: 101 02 176 (2001-08-01), None
patent: 698 06 785 (2003-02-01), None
patent: 0 954 071 (2002-06-01), None
patent: 4-150088 (1992-05-01), None
patent: 2001-358389 (2001-12-01), None
English Language Abstract of JP 4-150088, (May 22, 2009).
Masuda et al., “High gain two-stage amplification with erbium-doped fibre amplifier,” Electronics Letters, vol. 26, No. 10, pp. 661-662 (1990).
Advantest Corporation
Bolda Eric
Greenblum & Bernstein P.L.C.
LandOfFree
Optical amplifier apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical amplifier apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical amplifier apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4130687