Laser apparatus
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United States of America Patent
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-
Jun 17, 1980
Grant Date -
N/A
app pub date -
Dec 16, 1977
filing date -
Dec 16, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An infrared laser is described which is optically pumped by a pump laser operating at a visible wavelength. The polarization of the pump, is opposite from the lasing polarization, and is coupled colinearly with the laser beam by a Brewster angle polarization beam splitter in the laser beam path which reflects the pump polarization while transmitting the lasing polarization. Leakage of the pump polarization through the beam splitter provides a visible tracer propagating colinearly with the laser beam which permits the location of the invisible infrared beam and its alignment with respect to apparatus which utilizes the beam.
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