Driver unit for a laser Q-switch

Details Driver unit for a laser Q-switch Driver unit for a laser Q-switch

1985-09-30

1987-06-23

Scott, Jr., Leon

Coherent light generators

Particular beam control device

Q-switch

372 25, H01S 311

Patent

active

046758720

ABSTRACT:
A Q-switch driver for controlling laser output pulses, so that the laser output pulses are of an approximately equal amplitude. Sequences of light request pulses, each such light request pulse for causing the laser to produce a laser output pulse, are input to the Q-switch driver. The Q-switch is controlled by an RF oscillating signal produced by the Q-switch driver such that when the RF signal is present there is no output signal from the laser, and when the RF signal is zero a laser output pulse is produced. If the time between sequences of light request pulses is greater than a predetermined value, the RF signal from the Q-switch driver is modified by leaving the RF partially on so that there is some Q-spoiling present. The amount of RF produced during each light request pulse is gradually diminished exponentially over a predetermined time so that eventually the RF goes to zero during each light request pulse. Modifying the RF produced by the Q-switch driver prevents the generation of a giant first pulse by the laser.

REFERENCES:
patent: 3673504 (1972-06-01), Hilberg
patent: 3747019 (1973-07-01), Koechner et al.
Glass; Wavelength Scaling of Laser Plasma Interactions and Factors Influencing the Choice of a Laser Fusion Driver.

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