System for rapidly tuning a low pressure pulsed laser
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United States of America Patent
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Sep 19, 1989
Grant Date -
N/A
app pub date -
Sep 14, 1988
filing date -
Sep 14, 1988
priority date (Note) -
Expired
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Abstract
A rapidly tunable low pressure laser comprised of a one electrode pair lowressure CO.sub.2 gas laser gain cell and intra-cavity quarterwave plate and Q-switch. The cell has a fixed laser output coupled at one end of the laser cavity and at the other end of the cavity a wavelength switching device which changes laser lines in less than 1.times.10.sup.-3 .mu.sec, i.e. changes the wavelengths in less than 1 millisecond within the low pressure laser, to produce at least two quick pulses of different wavelengths at a separation of 1 millisecond. The wavelength switching device is comprised of a fast rotating mirror on the laser optical axis and a fixed grating, or a rotating grating on the optical axis.
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