35.1 W all-solid-state 355 nm ultraviolet laser

✍ Scribed by X. Yan; Q. Liu; H. Chen; X. Fu; M. Gong; D. Wang

• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 204 KB
• Volume: 7
• Category: Article
• ISSN: 1612-2011
• DOI: 10.1002/lapl.201010027

✦ Synopsis

We presented an efficient 35.1 W all-solid-state 355 nm ultraviolet laser. The external cavity nonlinear frequency conversion was used while a 100-W level AO Q-switched Nd:YVO 4 MOPA laser was used as the infrared source. Type I noncritical phase-matching LBO and type II phase-matching LBO were used for frequency doubling and sum-frequency mixing respectively. About 100 W TEM 00 mode 1064 nm laser was obtained from the MOPA laser when the pulse repetition rate increased from 65 kHz to 100 kHz. The highest 35.1 W average power of 355 nm ultraviolet laser was obtained from the nonlinear frequency conversion at 70 kHz with the pulse duration of 15.7 ns and optical conversion efficiency of 35.8% (infrared to ultraviolet), corresponding to the pulse peak power and pulse energy of 32 kW and 0.5 mJ respectively. The average power of ultraviolet laser varied from 28.5 W to 34.9 W when the pulse repetition rate decreased from 100 kHz to 65 kHz. The detailed output performance varying with pulse repetition rate, and the power stability of the ultraviolet laser, were also investigated.