1National Key Lab of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150080 2Key Lab of Solid State Laser, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 3Key Lab of Functional Crystal and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 4University of Chinese Academy of Sciences, Beijing 100049
Abstract：A high-pulse-energy high-beam-quality tunable Ti:sapphire laser pumped by a frequency-doubled Nd:YAG laser is demonstrated. Using a fused-silica prism as the dispersion element, a tuning range of 740–855 nm is obtained. At an incident pump energy of 774 mJ, the maximum output energy of 104 mJ at 790 nm with a pulse width of 100 μs is achieved at a repetition rate of 5 Hz. To the best of our knowledge, it is the highest pulse energy at 790 nm with pulse width of hundred micro-seconds for an all-solid-state laser. The linewidth of output is 0.5 nm, and the beam quality factor $M^{2}$ is 1.16. The high-pulse-energy high-beam-quality tunable Ti:sapphire laser in the range of 740–855 nm can be used to establish a more accurate and consistent absolute scale of second-order optical-nonlinear coefficients for KBe$_{2}$BO$_{3}$F$_{2}$ measured in a wider wavelength range and to assess Miller's rule quantitatively.
ISO, 11146-1: ISO 2005 Test Methods for Laser Beam Widths, Divergence Angles and Beam Propagation Ratios. Part 1: Stigmatic and Simple Astigmatic Beams
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ISO, 11146-2: ISO 2005 Test Methods For Laser Beam Widths Divergence Angles Beam Propagation Ratios. Part 2: General Astigmatic Beams
2017, Vol. 34 
