Optical communications – Transmitter and receiver system – Including optical waveguide
Reexamination Certificate
2007-09-25
2007-09-25
Sedighian, M. R. (Department: 2613)
Optical communications
Transmitter and receiver system
Including optical waveguide
C398S158000, C398S159000
Reexamination Certificate
active
10690659
ABSTRACT:
A control system for use in compensating for temperature-induced dispersion drift of an optical path, comprising an input adapted to obtain temperature data associated with the optical path; a control module adapted to determine control information on the basis of the temperature data; and an output adapted to provide a control signal to a dispersion compensator. The control signal is determined such that its receipt by the dispersion compensator causes the latter to induce a dispersive effect in a signal that travels the optical path, the dispersive effect being related to the control information. The ability to compensate for temperature-induced dispersion drift reduces the distortion margin in optical link budgets, allowing optical links to have longer reach, or to achieve the same reach using fewer line amplifiers. In a specific embodiment, dispersion compensation is accomplished via an open-loop control system such that feedback from the receiver site is not required.
REFERENCES:
patent: 5815294 (1998-09-01), Ishikawa et al.
patent: 2003/0223760 (2003-12-01), Takahara et al.
Alexander Walter et al.: Chromatic Dispersion Variations in Ultra-Long Haul Transmission Systems Arising from Seasonal Soil Temperatrure Variations: downloaded from: http://www.wcc.nrcs.usda.gov/publications on Jul. 29, 2003 (4 pages).
Pauline Rigby: Dispersion: New Version; Apr. 29, 2002: downloaded from: http://www.lightreading.com on Jul. 29, 2003 (3 pages).
C. K. Madsen: Tunable dispersion compensators based on optical allpass filters; downloaded from: http://www.ieee.org/organizations/pubs
ewsletters/loes/oct01/madsen.htm on Jul. 29, 2003 (3 pages).
O'Sullivan Maurice
Sandler Howard Martin
Borden Ladner Gervais LLP
Measures Jeffrey M.
Nortel Networks Limited
Sedighian M. R.
LandOfFree
Compensation of temperature-induced dispersion drift in... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compensation of temperature-induced dispersion drift in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compensation of temperature-induced dispersion drift in... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3757620