High beam quality 5 J, 200 Hz Nd:YAG laser system

摘要

A high beam quality,all-solid-state Nd:YAG laser system of high-repetition frequency has been built for Thomson scattering diagnosis.A 1.7 times diffraction limited output beam at a pulse energy of 5 J at 1064 nm is achieved for the first time with a pulse duration of 6.6 ns(FWHM)and a repetition rate of 200 Hz;the output energy stability is 4.9%peak-to-valley over 6000 shots.A novel pulsed laser system(Supplementary Fig.S1)with high average power and high beam quality has recently been built by Dr Zhong-Wei Fan's group at the Academy of Opto-Electronics,Chinese Academy of Sciences.Both the laser diode side-pumped rod and slab crystals are integrated into the amplifier(AMP)system.A 1.7 times diffraction-limited output beam at a pulse energy of 5 J at 1064 nm is achieved for the first time with a pulse duration of 6.6 ns(FWHM)and a repetition rate of 200 Hz;the output energy stability is 4.9%peak-to-valley over 6000 shots.The test results are shown in Figure 1a and 1b.