Back to results
US 5,512,932 AGranted
Method and apparatus for driving a semiconductor laser device
AssigneeMiles Inc.
InventorNorman F. Rolfe
Life of this patent
Estimating the term…
Abstract
A method and apparatus for driving a semiconductor laser device to produce a substantially constant optical power output over a range of temperature while preserving a high optical switching frequency.
Claims36
A method for driving a semiconductor laser device between first and second states comprising the steps of:
- (a) driving the semiconductor laser device with a bias current which produces a predetermined optical power output that defines said first state;
- (b) driving said semiconductor laser device at a higher current produced by the combination of said bias current and an information current, said higher current producing another predetermined optical power output that defines said second state;
- (c) producing a transition from said second state to said first state by steering the information current to a current sink having substantially the same switching speed and voltage versus current terminal characteristics as said semiconductor laser device;
- and,
- (d) producing a transition from said first state to said second state by steering said information current to said semiconductor laser device.
2 more elements
An apparatus for driving a semiconductor laser device between first and second states, said method comprising:
- (a) means for driving the semiconductor laser device with a bias current which produces a predetermined optical power output that defines said first state;
- (b) means for driving said semiconductor laser device at a higher current produced by the combination of said bias current and an information current, said higher current producing another predetermined optical power output that defines said second state;
- (c) means for producing a transition from said second state to said to said first state by steering said information current to a current sink having substantially the same switching speed and voltage versus current terminal characteristics as said semiconductor laser device;
- and,
- (d) means for producing a transition from said first state to said second state by steering said information current to said semiconductor laser device.
2 more elements
Dependencies are inferred from the claim text.