System and method for controlling optical sources,

专利名称：System and method for controlling optical

sources, such as laser diodes, and computerprogram product therefor

发明人：Keith Everett,Clive John Hook,Neil

Stafford,Luke Hitchin

申请号：US11133059申请日：20050519

公开号：US20050271100A1公开日：20051208

专利附图：

摘要：A system for controlling operation of an optical source, such as a laser diode

for optical communications, by controlling a bias current and a modulation currentsupplied thereto. With the source there are associated sensors for sensing the radiationgenerated and the temperature of the optical source to derive therefrom a first signalindicative of the power of the source radiation and a second signal indicative of thesource temperature. The system includes a control circuit for controlling the bias currentof the source as a function of the difference between the first signal indicative of thepower of the radiation and a predetermined optical power set point signal, whilegenerating a signal indicative of said bias current, and a driver device including an outputfor producing the predetermined optical power set point signal, a modelling block forgenerating a current threshold value as a function of the second signal indicative of thesource temperature, and a comparator fed with the signal indicative of said bias currentand the threshold current to produce the source modulation current as a function of saiddifference. Preferably the driver device and at least a part of the control circuit areimplemented in the form of a programmable system on a chip (“psoc”).

申请人：Keith Everett,Clive John Hook,Neil Stafford,Luke Hitchin

地址：Bury St Edmunds GB,Newmarket GB,Debenham GB,Singapore SG

国籍：GB,GB,GB,SG

更多信息请下载全文后查看