Coherent light generators – Particular pumping means – Electrical
Patent
1991-10-11
1994-01-18
Bovernick, Rodney B.
Coherent light generators
Particular pumping means
Electrical
372 38, H01S 3097
Patent
active
052805360
ABSTRACT:
A laser power supply including circuitry for converting standard, 115-120 volt, AC power from a wall outlet to current pulses for powering a laser, to generate a pulsed laser output beam having laser pulse amplitude and duration matching pre-selected parameters. In a preferred embodiment, the invention powers an argon laser tube and generates output laser beam pulses having power in the range from about 50 milliwatts to 2 watts, and duration in the range from about 0.01 second to 2 seconds. The invention converts standard AC power to current pulses having controlled duration, average amplitude, and ripple amplitude for powering a laser, and can produce laser output beam pulses with a turn-on time of less than 1 millisecond, with a switching frequency in the range from about 10 to 20 KHz without significant overshoot. A preferred embodiment of the invention powers a gas laser tube, and includes a magnet control circuit which enables the laser tube magnet in the absence of a special magnet control signal received at the magnet control circuit from a fiber optic link. The invention is particularly suitable for powering gas laser systems for use in ophthalmic and surgical applications, but is also useful for powering other types of laser systems. An important advantage of the invention is that its ability to accept standard, AC power from a wall outlet enables the inventive apparatus to be moved conveniently between treatment rooms (for use in any of the rooms), without the expense and inconvenience of installing special wiring.
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Dumond Gregory
Rorden Robert J.
Saunders Ralph
Bovernick Rodney B.
Coherent Inc.
Wise Robert E.
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