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Li B.,Tianjin University of Science and Technology | Ding X.,Tianjin University of Science and Technology | Sun B.,Tianjin University of Science and Technology | Sun B.,Tianjin Maiman Laser Technology Co. | And 7 more authors.
Wuli Xuebao/Acta Physica Sinica | Year: 2014

We report a wave-locked 878.6 nm diode-laser-pumped multi-segmented Nd:YVO4 laser operating at 1064 nm, which is compared with the high doping concentration and the low doping concentration monolithic Nd:YVO4 lasers. Experimental results show that the configuration of the wave-locked 878.6 nm diode-laser-pumped multi-segmented crystals not only can reduce thermal effects of the laser but also can improve the optical-to-optical conversion efficiency. We have achieved an output power of 28.2 W at 1064 nm with an incidence pump power of 40 W, corresponding to the optical-to-optical efficiency of 70.5%, slope efficiency of 70.6%. For absorbed pump power, the optical-to-optical efficiency is 76% and the slope efficiency is 76.4%. The laser also has an excellent output stability while the temperature is varied from 10℃ to 40℃. © 2014 Chinese Physical Society. Source


Li B.,Tianjin University of Technology | Li B.,Tianjin Maiman Laser Technology Co. | Sun B.,Tianjin Maiman Laser Technology Co. | Mu H.,Tianjin Maiman Laser Technology Co.
Applied Optics | Year: 2016

In this paper we have demonstrated an efficient generation of 355 nm radiation by a diode-end-pumped Nd:YAG/Nd:YVO4 passively Q-switched 1064 nm laser. Cr:YAG is used as a saturable absorber for pulse generation. Compared to Nd:YAG/Cr:YAG, a passively Q-switched 1064 nm laser with higher polarization ratio is obtained in an Nd:YAG/Nd:YVO4/Cr:YAG configuration, which is helpful to nonlinear frequency conversion. The maximum output power of 8.56Wat 1064 nm is obtained with the pulse repetition rate of 38.6 kHz. Under incident pump power of 25.8 W the polarization ratio of 1064 nm is more than 15:1. Type I and type II critical phase-matching lithium triborate are used as nonlinear frequency conversion crystals. A tripling harmonicgeneration output power of 2.22 W at 355 nm is achieved. © 2016 Optical Society of America. Source


Li B.,Tianjin University | Li B.,Tianjin Maiman Laser Technology Co. | Ding X.,Tianjin University | Zhang W.,Tianjin University | And 8 more authors.
Zhongguo Jiguang/Chinese Journal of Lasers | Year: 2014

A Nd: YVO4 laser at 1064 nm pumped by a wave-locked 878.6 nm laser diode is achieved. An output power of 5.75 W at 1064 nm for an absorbed pump power of 7.41 W, corresponding to an optical efficiency of 80.2%, optical to optical efficiency of 77.6%. The temperature characteristics of wave-locked 878.6 nm, wave-unlocked 808 nm and 878.6 nm pump laser are also researched. The result shows that wave-locked 878.6 nm pumped Nd: YVO4 laser has excellent output stability when the temperature varies from 10°C to 40°C. Source


Li B.,Tianjin University | Li B.,Tianjin University of Technology | Li B.,Tianjin Maiman Laser Technology Co. | Yao J.Q.,Tianjin University | And 13 more authors.
Optics and Laser Technology | Year: 2014

We report an efficient continuous-wave (CW) yellow beam based on a Nd:YVO4 laser with a dual-wavelength wave plate, which is a full-wave plate at 1342 nm and a quarter-wave plate at 1064 nm. By inserting the dual-wavelength wave plate into the laser cavity and tuning the fast axis angle, based on the polarized property emission of Nd:YVO4, two simultaneous wavelengths of 1064 nm and 1342 nm were achieved. A LiB 3O5 (LBO) crystal that is cut for critical type I phase matching at room temperature is used for summing frequency generation (SFG) of the laser. At an incident pump power of 5 W, a maximum CW output of 224 mW was obtained for a yellow laser with a wavelength of 593.5 nm and an optical-to-optical efficiency of 4.48%. To the best of our knowledge, this is the first time that a dual-wavelength wave plate has been used to realize a Nd:YVO4 yellow laser output. © 2013 Elsevier Ltd. Source


Li B.,Precision Information | Li B.,Tianjin Maiman Laser Technology Co. | Ding X.,Precision Information | Sun B.,Precision Information | And 8 more authors.
Applied Optics | Year: 2014

A multisegmented Nd:YVO4 laser operating at 1342 nm that is in-band pumped by a wavelength-locked 878.6 nm laser diode is reported here.We achieve an output power of 12.45Wat 1342 nm for an absorbed pump power of 35.6 W, corresponding to an optical-to-optical efficiency of 34.9% and a slope efficiency of 36.1%. To the best of our knowledge, it is the highest optical-to-optical efficiency of Nd:YVO4 lasers operating at 1342 nm with an output power more than 10 W. © 2014 Optical Society of America. Source

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