Short Pulse Width UV Laser at 355 nm
Based on Pulse LD Side-Pumped Ceramic Nd:YAG
and BBO Electro-Optical Q-Switched¹

Y. Bai^{a, b,} *, X. M. Chen^{a, b}, B. L. Lu^{a, b}, Z. Y. Ren^{a, b}, and J. T. Bai^{a, b}

^a National Key Laboratory of Photoelectric Technology and Functional Materials (Culture Base),
Institute of Photonics and Photon-Technology, Northwest University, Xi’an 710069, China

^b Shaanxi Engineering Technology Research Center for Solid State Lasers and Application, Xi’an 710069, China

*e-mail: by@nwu.edu.cn

September 5, 2011; in final form, September 8, 2011; published online December 28, 2011

Abstract—355 nm UV laser was obtained with a pulse width of less than 5 ns and a peak power at megawatt
level by adopting the 808 nm pulse laser diode (LD) side-pumped ceramic Nd:YAG and BBO crystal electro-
optical Q-switched. The single-pulse energy was measured to be 24.3 mJ with 4.86 ns pulse width and 5.11MW
peak power at a repetition rate of 1Hz under a 120 A pump current. Using a volume of beam splitting mirrors,
wavelength outputs at 1064, 532, and 355 nm pulse laser was obtained simultaneously with a respective average
output power of 656.6, 357.1, and 260.5 mW, the beam quality factor M² are ( = 5.83, = 5.61),
( = 4.25, = 4.08) and ( = 6.32, = 6.15), corresponding to a conversion effi-
ciency at 11% from 1064 to 355 nm.

DOI: 10.1134/S1054660X12020016

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