Patent · US Expired

Optical transmission system comprising a laser diode

US5526164A · kind A · utility

38Cited by

6References

4Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Thomas Link · Aberdeen, US
Dieter Will · Lauf an der Pegnitz, DE
Hubert Karl · Dresden, DE

Key dates

Filing date	May 19, 1994
Grant date	Jun 11, 1996
Priority date	—
Expiry date	May 19, 2014

Classification

Technology area (CPC H)Electricity
CPC primaryH04B10/564
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.