Abstract
Frequency-doubled near-infrared diode lasers are compact sources of visible laser light. For efficient frequency doubling the power of the laser radiation is usually enhanced by an external resonator. The doubling crystal is then placed at the location of a resonator internal focus. This doubling scheme requires diode laser radiation with near-diffraction-limited divergence and the laser frequency must be locked to a resonance of the enhancement cavity.
© 1996 Optical Society of America
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