Method of and device for pulse-mode driving a semi-conductor las

Details Method of and device for pulse-mode driving a semi-conductor las Method of and device for pulse-mode driving a semi-conductor las

1987-06-08

1989-03-28

Sikes, William L.

Coherent light generators

Particular beam control device

Control of pulse characteristics

372 29, 372 30, 372 31, 372 38, H01S 310, H01S 300, H01S 313

Patent

active

048170976

ABSTRACT:
A method of and a device for pulse-mode driving a semiconductor laser in which the semiconductor laser (60) is operated by first driving the laser into the LED region with a pedestal current pulse from a first current source (41) and by superposing thereon an information current pulse from a second current source (51) after current stabilization. Due to this two-stage drive, switching transients can be reduced so that shorter pulses are possible and unnecessary power dissipation between the information pulses is avoided, which extends to the lifetime of the semi-conductor laser.

REFERENCES:
patent: 4488305 (1984-12-01), Claverie et al.
patent: 4577320 (1986-03-01), Yoshikawa et al.
patent: 4635265 (1987-01-01), O'Harra, II

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