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Wang W.,Huazhong University of Science and Technology | Wang W.,National Engineering Research Center for Laser Processing | Zhu X.,Huazhong University of Science and Technology | Zhu X.,National Engineering Research Center for Laser Processing
Advanced Solid State Lasers, ASSL 2014 | Year: 2014

The effect of high peak power combined with big pulse energy on laser drilling is investigated experimentally, and compared with the efficiency and quality of drilling using single ms pulses. © OSA 2014. Source


Huang Y.,Huazhong University of Science and Technology | Huang Y.,National Engineering Research Center for Laser Processing | Zhu G.,Huazhong University of Science and Technology | Zhu G.,National Engineering Research Center for Laser Processing | And 2 more authors.
Advanced Solid State Lasers, ASSL 2014 | Year: 2014

We present a multi-pass pumping thin-disk laser based on conjugate relation of dual parabolic mirrors. Assembling errors of dual parabolic mirrors won't cause any misregistration of each pumping spot, ensuring a good anti-disturbance stability. © OSA 2014. Source


Wang D.,Huazhong University of Science and Technology | Wang D.,National Engineering Research Center for Laser Processing | Li G.,Huazhong University of Science and Technology | Li G.,National Engineering Research Center for Laser Processing | And 4 more authors.
Optical Engineering | Year: 2011

A positive branch unstable-waveguide hybrid resonator has been designed for a RF-excited slab CO 2 laser of 100W level. The output beam mode and the propagation characteristics in the two directions of unstable and waveguide were investigated by numerical and experimental methods. The results show that the output beam was collimated in the unstable direction, and was an approximate fundamental mode in the waveguide direction with a divergence angle of 12mrad. The output power decreased by 50% with the misaligned angle of the tail mirror of 1.5 mrad, and was close to 0 with the misaligned angle more than 3 mrad. © 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). Source


Wang M.,Huazhong University of Science and Technology | Wang M.,National Engineering Research Center for Laser Processing | Zhu G.,Huazhong University of Science and Technology | Zhu G.,National Engineering Research Center for Laser Processing | And 6 more authors.
Advanced Solid State Lasers, ASSL 2014 | Year: 2014

By numerical analysis, when packing laser disk crystal, using the Copper tungsten CuW75 which contain 25% mass fraction copper as the heatsink and gold-tin eutectic solder layer of greater than 50um thickness, the residual stress of solder layer after soldering process will be below tensile strength. In such a configuration, packing disk active laser gain mirror can increase the yield ratio. © OSA 2014. Source


Wang K.,Huazhong University of Science and Technology | Wang K.,National Engineering Research Center for Laser Processing | Zheng C.,Huazhong University of Science and Technology | Zheng C.,National Engineering Research Center for Laser Processing | And 8 more authors.
Advanced Solid State Lasers, ASSL 2014 | Year: 2014

Pulsed Nd :YAG laser with MOPA structure can get higher peak power,so as to obtain a higher laser power density, The dilution rate of coating can be effectively controlled which the metallurgical bonding truly achieved. © OSA 2014. Source

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