Abstract
Second harmonic generation of a copper HyBrID laser oscillator was performed at 15 kHz. 5.1 W UV (255 nm) total average power at 15 kHz were generated in two β-barium borate (BBO) crystals by frequency doubling of two 511 nm beams from a single unpolarized HyBrID copper vapor laser. The beam quality factors of the UV emission are found to be M X 2=30±2 and M Y 2=24±2. These two UV beams, combined at the focal point of a focusing objective, may enable high repetition rate UV laser processing.
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