Laser drive circuits

Details Laser drive circuits Laser drive circuits

1981-06-15

1983-08-23

Sikes, William L.

Coherent light generators

Particular beam control device

Having particular beam control circuit component

372 38, 372 81, 307270, 307285, H01S 313

Patent

active

044008120

ABSTRACT:
Circuitry which is capable of supplying a short-pulsewidth drive signal to a laser source, or the like. The circuitry comprises a plurality of VMOS transistors arranged to amplify both the voltage and current levels of an applied low-voltage, short-pulsewidth input signal, while maintaining the short pulsewidth thereof. Two embodiments are disclosed which employ either a plurality of parallel VMOS transistors in the output stage, or a signal VMOS output transistor, to drive the laser source. Pulsewidths of the drive signal are on the order of 20-40 nanoseconds with rise and decay times on the order of 2-7 nanoseconds. A first embodiment is capable of providing drive signals having peak power levels of about 90 watts utilizing an 80 volt power supply. A second embodiment is capable of providing drive signals having peak power levels on the order of 500 milliwatts. The second embodiment, however, has faster rise and decay times and operates at a pulse repetition frequency about 50 times faster than the first embodiment.

REFERENCES:
patent: 4223238 (1980-09-01), Parkinson et al.
patent: 4347445 (1982-08-01), Baker

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