In this Letter, a 116-actuator deformable mirror(DM) was used to correct the wavefront distortion in a 10.7 J,10 Hz neodymium-doped yttrium aluminum garnet(Nd:YAG) slab amplifier. By applying a pump-light homogenizer ...In this Letter, a 116-actuator deformable mirror(DM) was used to correct the wavefront distortion in a 10.7 J,10 Hz neodymium-doped yttrium aluminum garnet(Nd:YAG) slab amplifier. By applying a pump-light homogenizer to transform the 3 × 1 near-field beam array into an integrated beam, the beam quality was greatly improved from 5.54 times diffraction limit(TDL) to 1.57 TDL after being corrected by the DM. To the best of our knowledge, this is the first investigation on beam quality control of an arrayed near-field beam in high-energy diode-pumped solid-state lasers.展开更多
A 21.2 kW,1.94 times the diffraction-limit quasi-continuous-wave laser is presented in this Letter based on a multi-stage,power-scalable Yb:YAG master-oscillator-power-amplifier(MOPA)system under adaptive optics(AO)co...A 21.2 kW,1.94 times the diffraction-limit quasi-continuous-wave laser is presented in this Letter based on a multi-stage,power-scalable Yb:YAG master-oscillator-power-amplifier(MOPA)system under adaptive optics(AO)control.The output laser of the MOPA system is a rectangular beam with a length-width ratio of 2:1,a 200μs pulse duration,and a 1000 Hz repetition rate.With the AO control system,the beam quality of the laser is improved from 4.20 to 1.94 times the diffraction limit.To our knowledge,this is the best quality laser in the 20 kW class except for combined lasers.展开更多
基金supported by the National Natural Science Foundation of China(No.61775112)the Natural Science Foundation of Beijing Municipality(No.4172030)the Beijing Young Talents Support Project(No.2017000020124G044)
文摘In this Letter, a 116-actuator deformable mirror(DM) was used to correct the wavefront distortion in a 10.7 J,10 Hz neodymium-doped yttrium aluminum garnet(Nd:YAG) slab amplifier. By applying a pump-light homogenizer to transform the 3 × 1 near-field beam array into an integrated beam, the beam quality was greatly improved from 5.54 times diffraction limit(TDL) to 1.57 TDL after being corrected by the DM. To the best of our knowledge, this is the first investigation on beam quality control of an arrayed near-field beam in high-energy diode-pumped solid-state lasers.
基金This work was supported by the National Natural Science Foundation of China(No.61775112).
文摘A 21.2 kW,1.94 times the diffraction-limit quasi-continuous-wave laser is presented in this Letter based on a multi-stage,power-scalable Yb:YAG master-oscillator-power-amplifier(MOPA)system under adaptive optics(AO)control.The output laser of the MOPA system is a rectangular beam with a length-width ratio of 2:1,a 200μs pulse duration,and a 1000 Hz repetition rate.With the AO control system,the beam quality of the laser is improved from 4.20 to 1.94 times the diffraction limit.To our knowledge,this is the best quality laser in the 20 kW class except for combined lasers.
