Laser resonator and frequency-converted laser
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United States of America Patent
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Issued Date -
Aug 10, 2006
app pub date -
Dec 29, 2003
filing date -
Jan 23, 2003
priority date (Note) -
Abandoned
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Abstract
An optically pumped, in particular diode-pumped, continuous solid-state laser produces a primary laser beam whose frequency is converted into the visible or ultraviolet spectral range by means of one or more downstream passive resonators with non-linear crystals. At relatively low cost and complication it is provided that precisely two longitudinal laser modes of approximately equal amplitude are excited in the laser resonator. That achieves a high level of efficiency for the overall system and a very low noise level of the resulting frequency-converted laser beam. In one embodiment of the invention the frequency-converted radiation contains three or more adjacent frequencies. In another embodiment of the invention the frequency-converted laser radiation contains only one single frequency and therefore corresponds to the radiation of a monomode laser.
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