Semiconductor laser modulation control system

Details Semiconductor laser modulation control system Semiconductor laser modulation control system

1989-03-06

1989-11-28

Sikes, William L.

Coherent light generators

Particular beam control device

Modulation

372 29, 372 33, 372 38, H01S 310, H01S 300

Patent

active

048842788

ABSTRACT:
Disclosed is a semiconductor laser modulation control system, and a method thereof. The system includes a drive circuit (1) for supplying a drive current to a semiconductor laser (2) in accordance with an input data, to modulate the input data into an optical signal of the semiconductor laser (2). The optical signal is either at a high intensity state or a low intensity state in accordance with an input data of "1" or "0", in respective time slots of the input data. The system further includes a duty ratio conversion circuit (3) for converting the duty ratio of the input data in such a way that the low intensity state of the optical signal is returned to the high intensity state within each time slot of the input data, whereby the relaxation oscillation is suppressed.

REFERENCES:
patent: 4243951 (1981-01-01), Wolkstein et al.
patent: 4539686 (1985-09-01), Bosch et al.
patent: 4594717 (1986-06-01), Bracht et al.
patent: 4744087 (1988-05-01), Nicia

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