Abstract
We report a stable, high-power, high-repetition-rate, picosecond ultraviolet (UV) source at 355 nm based on single-pass sum-frequency generation of a mode-locked Yb-fiber laser at 1064 nm in the nonlinear crystal . By performing single-pass second-harmonic generation (SHG) in a 30-mm-long crystal, up to 9.1 W of average green power at 532 nm is obtained at a single-pass SHG efficiency of 54%. The generated green pulses have a duration of 16.2 ps at a repetition rate of 79.5 MHz, with a passive power stability better than 0.5% rms and a pointing stability over 1 h, in high beam quality. The green radiation is then sum-frequency-mixed with the fundamental in a 10-mm-long crystal, providing as much as 1.2 W of average UV power, at an infrared-to-UV conversion efficiency of 7.2%, with a passive power stability better than 0.4% rms over 3 h and a pointing stability over 1 h, in spatial profile.
© 2015 Optical Society of America
Full Article | PDF ArticleMore Like This
S. Chaitanya Kumar, J. Canals Casals, E. Sanchez Bautista, K. Devi, and M. Ebrahim-Zadeh
Opt. Lett. 40(10) 2397-2400 (2015)
S. Chaitanya Kumar, Kavita Devi, and M. Ebrahim-Zadeh
Opt. Lett. 38(23) 5114-5117 (2013)
N. Apurv Chaitanya, A. Aadhi, M. V. Jabir, and G. K. Samanta
Opt. Lett. 40(18) 4269-4272 (2015)