Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2006-12-12
2006-12-12
Le, Que T. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C250S221000
Reexamination Certificate
active
07148469
ABSTRACT:
An optical transmission system includes an optical source such as a laser having an optical output, this optical output being modulated such that it has periods of operation having a first set of characteristics interspersed with periods of operation having a second set of characteristics. The output is then split into at least two signals, and one of the signals delayed with respect to the other signal before the two are mixed, such that a portion of the modulated optical output having the first set of characteristics in one of the signals corresponds with a portion of the modulated optical output having the second set of characteristics of another of the signals. This allows a single optical source to provide to a receiver a local oscillator signal simultaneously with a data carrying signal. The system is particularly suitable for lidar applications, including gas sensing, but also has utility in data communications systems.
REFERENCES:
patent: 4297030 (1981-10-01), Chaborski
patent: 4830486 (1989-05-01), Goodwin
patent: 5030824 (1991-07-01), Babbitt
patent: 5170218 (1992-12-01), Keene
patent: 6147763 (2000-11-01), Steinlechner
patent: 6608669 (2003-08-01), Holton
patent: WO 2/071097 (2002-09-01), None
Le Que T.
McDonnell Boehnen & Hulbert & Berghoff LLP
QinetiQ Limited
LandOfFree
Optical signal transmission system including a splitter and... 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 signal transmission system including a splitter and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical signal transmission system including a splitter and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3672428