We demonstrate an end-pumped, c-cut Nd：YVO4 laser that emitted first-order Laguerre-Gaussian （LGol） beam by adjusting the position of focused pump beam relative to laser crystal. The pumping light reached the laser...We demonstrate an end-pumped, c-cut Nd：YVO4 laser that emitted first-order Laguerre-Gaussian （LGol） beam by adjusting the position of focused pump beam relative to laser crystal. The pumping light reached the laser crystal has circular and solid intensity profile. The laser is compact and stable, and the obtained LG01 beam power reaches 202 mW with -25% slope efficiency.展开更多
We report an efficient mid-infrared extracavity optical parametric oscillator(OPO)based on the nonlinear crystal BaGa4Se7 pumped by a diode-side-pumped Q-switched Nd:Y3 Al5O12(Nd:YAG)laser.The maximum pulse energy of ...We report an efficient mid-infrared extracavity optical parametric oscillator(OPO)based on the nonlinear crystal BaGa4Se7 pumped by a diode-side-pumped Q-switched Nd:Y3 Al5O12(Nd:YAG)laser.The maximum pulse energy of 1.03mJ at 4.25μm is obtained with the repetition rate of 10 Hz and pulse width of 12.6 ns when the pump energy was 13.5mJ,corresponding to an optical-to-optical conversion efficiency of 7.6% from 1.064μm to 4.25μm.The idler wave slope conversion efficiency was 12%.To the best of our knowledge,it is the highest reported conversion efficiency for the compact BaGa4Se7 OPO driven by the Nd:YAG laser.展开更多
A laser-diode end-pumped Nd：YVO4 crystal laser is demonstrated to emit the first-order Laguerre- Gaussian （LGm） mode with 502-mW laser power and 22% slope efficiency. Tile LGm-mode is lased only when the pumping ar...A laser-diode end-pumped Nd：YVO4 crystal laser is demonstrated to emit the first-order Laguerre- Gaussian （LGm） mode with 502-mW laser power and 22% slope efficiency. Tile LGm-mode is lased only when the pumping area locates in the central part of the laser crystal＇s front surface, and thereafter the symmetrical LGm-HGol-TEM00 mode transition happens when laser crystal is moved laterally inside several-tens-micron area. The possible mechanism responsible for the phenomenon of symmetrical mode transition is also discussed.展开更多
文摘We demonstrate an end-pumped, c-cut Nd：YVO4 laser that emitted first-order Laguerre-Gaussian （LGol） beam by adjusting the position of focused pump beam relative to laser crystal. The pumping light reached the laser crystal has circular and solid intensity profile. The laser is compact and stable, and the obtained LG01 beam power reaches 202 mW with -25% slope efficiency.
基金supported by the Science and Technology on Plasma Physics Laboratory(No.6142A04030403)the Innovation Fund of the Chinese Academy of Sciences(No.CXJJ-17-M164)
文摘We report an efficient mid-infrared extracavity optical parametric oscillator(OPO)based on the nonlinear crystal BaGa4Se7 pumped by a diode-side-pumped Q-switched Nd:Y3 Al5O12(Nd:YAG)laser.The maximum pulse energy of 1.03mJ at 4.25μm is obtained with the repetition rate of 10 Hz and pulse width of 12.6 ns when the pump energy was 13.5mJ,corresponding to an optical-to-optical conversion efficiency of 7.6% from 1.064μm to 4.25μm.The idler wave slope conversion efficiency was 12%.To the best of our knowledge,it is the highest reported conversion efficiency for the compact BaGa4Se7 OPO driven by the Nd:YAG laser.
基金supported by the National Natural Science Foundation of China(No.61275206)the National "973" Project of China(No.2014CB921300)
文摘A laser-diode end-pumped Nd：YVO4 crystal laser is demonstrated to emit the first-order Laguerre- Gaussian （LGm） mode with 502-mW laser power and 22% slope efficiency. Tile LGm-mode is lased only when the pumping area locates in the central part of the laser crystal＇s front surface, and thereafter the symmetrical LGm-HGol-TEM00 mode transition happens when laser crystal is moved laterally inside several-tens-micron area. The possible mechanism responsible for the phenomenon of symmetrical mode transition is also discussed.
