Mr. Yang Liu Profile

Yang Liu

at 11th Research Institute of CETC

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Author

Publications (7)

Proceedings Article | 24 November 2021 Paper

Simulation design of laser diode side-pumped Nd:YAG rod amplifier without water-cooling

S. W. Bian, X. Yang, J. Feng, L. Liu, C. Wang, Y. Liu

Proceedings Volume 12060, 1206014 (2021) https://doi.org/10.1117/12.2606608

KEYWORDS: Semiconductor lasers, Laser systems engineering, Nd:YAG lasers, Optical simulations, Laser amplifiers, Amplifiers, Monte Carlo methods, Absorption, Wavefronts, Thermal effects

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Proceedings Article | 7 October 2019 Presentation + Paper

Investigation of the end pump surface gain medium slab laser

Chao Wang, Yang Liu, Ke Wang, Wentao Wang, Jiao Liu, Xiaojun Tang, Xingbo Liang, Hong Zhao

Proceedings Volume 11162, 111620A (2019) https://doi.org/10.1117/12.2534017

KEYWORDS: Absorption, Nd:YAG lasers, Optical pumping, YAG lasers, Laser applications, Solid state lasers, Thermal effects, Analytical research, Continuous wave operation, Laser development

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Proceedings Article | 24 October 2017 Paper

Study on double end-pumped high power slab laser with laser diode arrays

Jian Lei, Xue Yang, Yang Liu, Bao Li, Tianqi Li, Xiaojun Tang

Proceedings Volume 10457, 104571F (2017) https://doi.org/10.1117/12.2284262

KEYWORDS: Semiconductor lasers, High power lasers

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Proceedings Article | 9 December 2014 Paper

Numerical prediction of micro-channel LD heat sink operated with antifreeze based on CFD method

Gang Liu, Yang Liu, Chao Wang, Wentao Wang, Gang Wang, Xiaojun Tang

Proceedings Volume 9294, 92940O (2014) https://doi.org/10.1117/12.2072612

KEYWORDS: Resistance, Microfluidics, Water, Computational fluid dynamics, High power lasers, Copper, Fluid dynamics, Liquids, Cooling systems, Semiconductor lasers

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To theoretically study the feasibility of antifreeze coolants applied as cooling fluids for high power LD heat sink, detailed Computational Fluid Dynamics (CFD) analysis of liquid cooled micro-channels heat sinks is presented. The performance operated with antifreeze coolant (ethylene glycol aqueous solution) compared with pure water are numerical calculated for the heat sinks with the same micro-channels structures. The maximum thermal resistance, total pressure loss (flow resistance), thermal resistance vs. flow-rate, and pressure loss vs. flow-rate etc. characteristics are numerical calculated. The results indicate that the type and temperature of coolants plays an important role on the performance of heat sinks. The whole thermal resistance and pressure loss of heat sinks increase significantly with antifreeze coolants compared with pure water mainly due to its relatively lower thermal conductivity and higher fluid viscosity. The thermal resistance and pressure loss are functions of the flow rate and operation temperature. Increasing of the coolant flow rate can reduce the thermal resistance of heat sinks; meanwhile increase the pressure loss significantly. The thermal resistance tends to a limit with increasing flow rate, while the pressure loss tends to increase exponentially with increasing flow rate. Low operation temperature chiefly increases the pressure loss rather than thermal resistance due to the remarkable increasing of fluid viscosity. The actual working point of the cooling circulation system can be determined on the basis of the pressure drop vs. flow rate curve for the micro-channel heat sink and that for the circulation system. In the same system, if the type or/and temperature of the coolant is changed, the working point is accordingly influenced, that is, working flow rate and pressure is changed simultaneously, due to which the heat sink performance is influenced. According to the numerical simulation results, if ethylene glycol aqueous solution is applied instead of pure water as the coolant under the same or a higher working temperature, the available output of optical power will decrease due to the worse heat sink performance; if applied under a lower working temperature(0 °C, －20 °C), although the heat sink performance become worse, however the temperature difference of heat transfer rises more significantly, the available output of optical power will increase on the contrary.

Proceedings Article | 18 November 2014 Paper

101W quasi-continuous wave Nd:YVO4 slab laser with high beam quality

Yang Liu, Xingbo Liang, Lei Liu, Zhe Wang, Shanchao Liu, Lu Chen, Xiaojun Tang, Hong Zhao, Shouhuan Zhou

Proceedings Volume 9266, 92660R (2014) https://doi.org/10.1117/12.2074622

KEYWORDS: Neodymium lasers, Resonators, Mirrors, Crystals, Pulsed laser operation, Semiconductor lasers, Laser resonators, Laser crystals, Laser applications, Nd:YAG lasers

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Proceedings Article | 17 September 2013 Paper

Experimental research on mechanism of phase noise of laser amplifier

Lei Liu, Yang Liu, Kun Zhang, Xiao-jun Tang, Chao Wang, Hong Zhao

Proceedings Volume 8904, 89040Z (2013) https://doi.org/10.1117/12.2034099

KEYWORDS: Laser amplifiers, High power lasers, Fiber lasers, Amplifiers, Temperature metrology, Optical fibers, Solid state lasers, Refractive index, Phase measurement, Beam splitters

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Proceedings Article | 15 October 2012 Paper

Design of micro-channel heat sink with diamond heat spreader for high power LD

Gang Liu, Wentao Wang, Lei Liu, Xingbo Liang, Chao Wang, Sanbin Chen, Yang Liu, Xiaojun Tang

Proceedings Volume 8419, 841910 (2012) https://doi.org/10.1117/12.979795

KEYWORDS: Diamond, Resistance, Copper, Microfluidics, Heat flux, Protactinium, Computer simulations, High power lasers, Computational fluid dynamics, Water

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Showing 5 of 7 publications

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