Optical communications – Transmitter – Including compensation
Reexamination Certificate
2006-04-18
2006-04-18
Phan, Hanh (Department: 2638)
Optical communications
Transmitter
Including compensation
C398S182000, C398S183000, C398S185000, C398S186000, C398S187000, C398S188000, C398S189000, C398S192000, C398S193000, C398S194000, C398S195000, C398S197000, C398S118000, C372S020000, C372S032000, C372S038060, C372S029010
Reexamination Certificate
active
07031619
ABSTRACT:
A method and system for dispersion control of electromagnetic signals in communication networks by narrowing the widths of electromagnetic pulses such as modulated laser signals. Generally, in the preferred embodiment, the present invention utilizes a feedback loop based on dither frequency modulation which dynamically adjusts the alignment of the laser center frequency with the filter passband. In this way, there is an acceptable tradeoff between optical power and pulse width, so a higher power laser can be used to generate a narrower optical pulse. The narrower pulses then travel farther in the fiber link before reaching their dispersion limit. It is believed that, by using this invention, existing link distance could be doubled, while re-using existing installed singlemode fiber. The systems employing the feedback loop may be information carrying or control systems.
REFERENCES:
patent: 5777773 (1998-07-01), Epworth et al.
patent: 5892606 (1999-04-01), Fatehi et al.
patent: 6222861 (2001-04-01), Kuo et al.
patent: 6396603 (2002-05-01), Kim
patent: 6535532 (2003-03-01), Ackerman et al.
patent: 6597840 (2003-07-01), Jacobowitz et al.
patent: 6643424 (2003-11-01), Jacobowitz et al.
patent: 6654152 (2003-11-01), Jacobowitz et al.
patent: 6674936 (2004-01-01), Jacobowitz et al.
patent: 6724786 (2004-04-01), Jacobowitz et al.
patent: 6738187 (2004-05-01), DeCusatis et al.
patent: 6751014 (2004-06-01), DeCusatis et al.
patent: 6816517 (2004-11-01), Jacobowitz et al.
patent: 2002/0176457 (2002-11-01), DeCusatis et al.
patent: 2003/0002138 (2003-01-01), DeCusatis et al.
patent: 2003/0043862 (2003-03-01), Jacobowitz et al.
patent: 2003/0058510 (2003-03-01), Jacobowitz et al.
patent: 2003/0059157 (2003-03-01), DeCusatis et al.
patent: 2003/0072333 (2003-04-01), Jacobowitz et al.
patent: 2003/0072869 (2003-04-01), DeCusatis et al.
patent: 2003/0081281 (2003-05-01), Decusatis et al.
Bann, R., et al., “Micromachining system accomodates large wafers,” Laser Focus World, www.optoelectronics-world.com, pp. 189-192, Jan. 2001.
Kartalopoulos, S.,“Introduction to DWDM Technology Data in a Rainbow,” IEEE, Chapter 3, pp. 67-68, (1999).
Kartalopoulos, S., “Other Optical Components,” IEEE, Chapter 9, pp. 131-137, (1999).
Carroll, J., et al.,“Distributed feedback semiconductor lasers,” IEE Circuits, Devices and Systems Series 10, SPIE Press Monograph, vol. PM52, pp 9-15, (1998).
DeCusatis Casimer M.
Jacobowitz Lawrence
Abate Joseph P.
International Business Machines - Corporation
Phan Hanh
Scully Scott Murphy & Presser
LandOfFree
Method and system for dispersion control of electromagnetic... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and system for dispersion control of electromagnetic..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for dispersion control of electromagnetic... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3588339