High UV average power at 15 kHz by frequency doubling of a copper HyBrID vapor laser in β-barium borate

• Published in: Optics communications Vol. 211; no. 1; pp. 277 - 282
• Main Authors: Huot, N, Jonin, C, Sanner, N, Baubeau, E, Audouard, E, Laporte, P
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.10.2002; Elsevier Science; Elsevier
• Subjects: Copper HyBrID vapor laser; Exact sciences and technology; Frequency conversion ; harmonic generation, including high-order harmonic generation; Frequency doubling; Fundamental areas of phenomenology (including applications); Gas lasers including excimer and metal-vapor lasers; Lasers; Nonlinear optics; Optics; Physics; UV; Frequency doubling; Copper HyBrID vapor laser; Beam profiles; Second harmonic generation; Output power; Radiation quality; High repetition rate; Ternary compounds; Barium compounds; Metal vapor lasers; Experimental study; Ultraviolet radiation; Green lasers; Visible radiation; Optical frequency conversion; Gas lasers; Nonlinear optics; Keywords: Copper HyBrID vapor laser
• ISSN: 0030-4018; 1873-0310
• DOI: 10.1016/S0030-4018(02)01812-6

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.