Laser beam data verification system

Details Laser beam data verification system Laser beam data verification system

1988-08-25

1989-11-21

Griffin, Robert L.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455600, 455608, 455618, H04B 900

Patent

active

048827746

ABSTRACT:
A beam failure alarm and protection circuit for a laser communications link. In order to distinguish a true beam failure from a mere absence of data to be transmitted, an alternate signal is produced in the transmitter whenever no data is available for transmission. The alternate signal is of a much higher frequency than true signals and is bandpass filtered. Its absence is used at the receiver to shut down the data output and trigger an alarm if the receiver senses no alternate signal within the maximum time that a typical burst of data would terminate.

REFERENCES:
patent: 3131258 (1964-04-01), O'Neill
patent: 4399565 (1983-08-01), Jarret
patent: 4481678 (1984-11-01), Sakamoto
patent: 4633523 (1986-12-01), Witkover

Affiliated with

Also associated with

Rating

Laser beam data verification system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Laser beam data verification system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser beam data verification system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1430371