Optical transmission system comprising a laser diode

Details Optical transmission system comprising a laser diode Optical transmission system comprising a laser diode

1994-05-19

1996-06-11

Pascal, Leslie

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

H04B 1006

Patent

active

055261647

ABSTRACT:
An optical transmitter for transmission of data signals includes a laser diode producing optical radiation and a photodiode which in response thereto produces a photocurrent the mean value of which corresponds to the mean optical power of the radiation. Based on the photocurrent a control circuit derives parameters for controlling the laser current so as to compensate for changes in the characteristic line thereof, which line is the relation between optical power and laser current. Such parameters include a modulation current setting parameter U.sub.mod and a bias current setting parameter U.sub.0. The bias current is controlled to remain at or above the dip in the characteristic line at relatively low current levels.

REFERENCES:
patent: 4277846 (1981-07-01), Chen
patent: 5153765 (1992-10-01), Grunziger
patent: 5309269 (1994-05-01), Shibao
patent: 5311005 (1994-05-01), Visocchi
patent: 5317443 (1994-05-01), Nishimoto
patent: 5373387 (1994-12-01), Bosch

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