Abstract
Intracavity-frequency-doubled, diode-pumped lasers are attractive sources of visible light. The best characterized materials for a diode-pumped, frequency-doubled system are Nd:YAG as the laser medium and KTP as the nonlinear medium. Since frequency doubling of a 1064 nm fundamental wavelength in KTP requires Type II phasematching, both fundamental polarization states must be excited to generate the second harmonic. Poynting vector walk-off between these fundamental polarization states can introduce resonator loss.1 By orienting the KTP at an oblique angle of incidence within the resonator and fabricating the KTP so that the phasematching condition is satisfied, this loss can be eliminated.
© 1993 Optical Society of America
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