Controller which controls a variable optical attenuator to...

Details Controller which controls a variable optical attenuator to... Controller which controls a variable optical attenuator to...

2005-03-08

2005-03-08

Moskowitz, Nelson (Department: 3663)

Optical: systems and elements

Optical amplifier

Correction of deleterious effects

C359S199200, C359S199200, C359S337120, C359S337500

Reexamination Certificate

active

06865016

ABSTRACT:
An optical amplifying apparatus which includes an optical amplifier, an optical attenuator and a controller. The optical amplifier amplifies a light signal having a variable number of channels. The optical attenuator passes the amplified light signal and has a variable light transmissivity. Prior to varying the number of channels in the light signal, the controller varies the light transmissivity of the optical attenuator so that a power level of the amplified light signal is maintained at an approximately constant level that depends on the number of channels in the light signal prior to the varying the number of channels. While the number of channels in the light signal is being varied, the controller maintains the light transmissivity of the optical attenuator to be constant. Subsequent to varying the number of channels in the light signal, the controller varies the light transmissivity of the optical attenuator so that a power level of the amplified light signal is maintained at an approximately constant level that depends on the number of channels in the light signal subsequent to the varying the number of channels.

REFERENCES:
patent: 4644145 (1987-02-01), Gundner
patent: 5396360 (1995-03-01), Majima
patent: 5436760 (1995-07-01), Nakabayashi
patent: 5463487 (1995-10-01), Epworth
patent: 5510926 (1996-04-01), Bayart et al.
patent: 5530584 (1996-06-01), Myslinski et al.
patent: 5642215 (1997-06-01), Suzuki et al.
patent: 5664131 (1997-09-01), Sugiya
patent: 5764404 (1998-06-01), Yamane et al.
patent: 5805322 (1998-09-01), Tomofuji
patent: 5966237 (1999-10-01), Sugaya et al.
patent: 5995274 (1999-11-01), Sugaya et al.
patent: 6025947 (2000-02-01), Sugaya et al.
patent: 6055092 (2000-04-01), Sugaya et al.
patent: 6198572 (2001-03-01), Sugaya et al.
patent: 6342965 (2002-01-01), Kinoshita
patent: 6377395 (2002-04-01), Sugaya et al.
patent: 6646791 (2003-11-01), Sugaya et al.
patent: 19516439 (1995-11-01), None
patent: 0695050 (1996-01-01), None
patent: 2280561 (1995-02-01), None
patent: 2294170 (1996-04-01), None
patent: 3-206427 (1991-09-01), None
patent: 5-241209 (1993-09-01), None
patent: 7212315 (1995-08-01), None
Japanese Publication “Er:Doped Fiber Amplifier for WDM Transmission Using Fiber Gain Control,” Technical Report of IEICE, 0CS94-66, OPE94, Nov. 1994, (including English language Abstract).
Nakabayashi, et al., Tech, Report of IEICE, OCS 94-66, OPE 94-89 (Nov. 1994) pp. 31-36 and 1-15.
Sugaya et al., OAA '95 Paper FC3, Jun. 16, 1995, 5 pages.
Chen, et al., “Field Experiment of 10Gbit/s, 360km Transmission Through Embedded Standard (non-DSF) Fibre Cables,” Electronics Letters, Jul. 7, 1994, vol. 30, No. 14, pp. 1159-1160.

Affiliated with

Also associated with

Rating

Controller which controls a variable optical attenuator to... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Controller which controls a variable optical attenuator to..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Controller which controls a variable optical attenuator to... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3368698