Optical communication system

Details Optical communication system Optical communication system

1989-01-02

1989-09-19

Griffin, Robert L.

Multiplex communications

Wide area network

Packet switching

455600, 455608, H04B 900

Patent

active

048688096

ABSTRACT:
An optical communications system comprises a pluarality of optical transmitters coupled by a common channel or bus to an optical receiver. The optical transmitters are operated using time division multiplexing (TDM), each TDM period being word or message length. The optical transmitters each comprise a least one current source to drive the light source, for example a laser, in response to the data signal, to vary its output power about a steady level which is the average of the maximum and minimum values. Therefore each current source may be controlled as to increase its output gradually (preferably sinusoidally) to reach the aforesaid mean level at the beginning of a TDM period and to decrease it in the converse way after the period ends. Such an arrangement avoids the need for guard time before and after the TDM time period, thereby increasing channel efficiency, and improves receiver sensitivity by reducing quantum shot noise due to steady light from inactive transmitters.

REFERENCES:
patent: 4095097 (1978-06-01), Reeve
patent: 4227260 (1980-10-01), Vojvodich
patent: 4397042 (1983-08-01), Tsujii
patent: 4612671 (1980-09-01), Giles

Affiliated with

Also associated with

Rating

Optical communication 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 Optical communication system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical communication system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-374535