Laser DC bias controller

Details Laser DC bias controller Laser DC bias controller

1986-12-22

1988-07-12

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

455610, 455612, 455613, H01S 310

Patent

active

047571934

ABSTRACT:
A laser DC bias controller is disclosed for controlling and monitoring the laser of a fiber-optic transmitter. The arrangement comprises an optical power monitor including a light detector for converting the light output by the laser into photo current. The photo current is converted by the optical power monitor into a voltage representation of the magnitude of the light output by the laser. The voltage representation is output to a DC constant current source which uses the voltage to provide operating current to the laser of sufficient magnitude to keep the laser operating at a set output level. A transmit data detector monitors the incoming data signals to the fiber optic transmitter and outputs to the optical power monitor a current signal which indicates a failure of the data signal. The optical power monitor converts the current signal to a voltage representation which is output to the DC constant current source. The DC constant current source subsequently turns off the operating current to the laser and an alarm signal representing a failure of the data drive circuit is output to a controller interface. Finally, an optical output detector connected to the optical power monitor is provided to compare the voltage output by the optical power monitor to a set value. When the voltage falls below the set value, the optical output detector sends an alarm signal to the controller interface indicating that the laser has failed.

REFERENCES:
patent: 4307469 (1981-12-01), Casper et al.
patent: 4553268 (1985-11-01), Tilly

Affiliated with

Also associated with

Rating

Laser DC bias controller 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 DC bias controller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser DC bias controller will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-665575