A High-Pulse-Energy High-Beam-Quality Tunable Ti:Sapphire Laser Using a Prism-Dispersion Cavity

摘要

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 774mJ,the maximum output energy of 104mJ at 790nm 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 aJl-solid-state laser.The linewidth of output is 0.5 nm,and the beam quality factor M2 is 1.16.The high-pulse-energy high-beam-quality tunable Ti:sapphire laser in the range of 7400855nm can be used to establish a more accurate and consistent absolute scale of second-order optical-nonlinear coefficients for KBe2BO3F2 measured in a wider wavelength range and to assess Miller's rule quantitatively.