Laser system

Details Laser system Laser system

1993-06-28

1995-07-18

Healy, Brian

Coherent light generators

Particular pumping means

372 10, 372 38, 372 51, 372 54, 372 70, 372 82, 372 87, H01S 309, H01S 300

Patent

active

054348803

ABSTRACT:
A laser system comprises an optical head, a power supply and a computer for controlling the power supply. The optical head comprises a pair of mirrors and four pumping sections. Each pumping section comprises a pair of gas discharge lamps pumping an Nd:YAG laser element. The power supply provides the lamps with alternating current at 25 kHz so that the laser system produces a continuous, modulated or pulsed output light beam. The power supply comprises three boost converters connected in parallel for converting three phase mains supply to direct current and four DC-AC converters. Each DC-AC converter converts the DC output from the boost converters to an AC supply for the lamps of a respective one of the pumping sections. Each DC-AC converter comprises a resonant circuit having an inductor and capacitor connected in series, the lamps being connected across the capacitor, a pair of transistors for conducting current through the resonant circuit in alternating directions, and a control circuit for the transistors. The power supply is also arranged to supply alternating current at a relatively high voltage to the lamps for triggering a discharge. In a modification, the output of the power supply is rectified before it is supplied to the lamps.

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