Laser power supply and control device for a fiber optic link between a subscriber and a telecommunications central office
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 17, 1991
Grant Date -
N/A
app pub date -
Mar 21, 1990
filing date -
Mar 22, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A laser power supply and control device for a fiber optic link between a subscriber and a telecommunications central office provides selection of one of two data sources and varies the laser current. The device includes a current generator controlled by an activation signal and delivers a laser current to a laser that can be varied. A selector circuit is connected to the two data sources. An output modulator has an input connected to the current generator which delivers the laser current thereto and to the selector circuit which delivers the transmit data. Its output is connected to the laser to which it delivers the laser current modulated by the transmit data. In the absence of data to transmit the value of the activation signal, the current generator is disabled so that the laser is not energized.
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