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	Three-dimensional numerical study of a kitchen extractor adopting nearby pumping method 会议论文 OAI收割 2012 International Conference on Material Sciences and Manufacturing Technology, ICMSMT 2012, Dalian, China, OCT 05-06, 2012 作者: Deng J(邓晶); Hong CG; Wang GQ(王贵全); Sheng HZ(盛宏至); Deng J(邓晶) 收藏 \| 浏览/下载：51/0 \| 提交时间：2013/02/26 Computational fluid dynamics Computer simulation Efficiency Kitchens Manufacture Materials science Pumps Collection efficiency Computational Fluid Dynamics software Energy cost Gas films Negative pressures Numerical results Optimum designs Particular distribution Positive pressure Pumping effect Pumping mechanism Pumping methods Third generation
	All-solid-state high beam quality 1053nm nd: Glass amplifier at repetition frequency (EI CONFERENCE) 会议论文 OAI收割 2nd International Conference on Optical, Electronic Materials and Applications 2012, OEMA 2012, May 25, 2012 - May 26, 2012, Chongqing, China 作者: Qiu J.; Yu J. 收藏 \| 浏览/下载：26/0 \| 提交时间：2013/03/25 A laser amplifier of LD pumping Nd: glass with a high beam quality and stability which amplifies nanosecond laser pulse has been developed in this paper. The device adopts the major technology of "LD pumping multi pass amplification together". Beam transmission is designed with the technology of "inhibition of diffraction effect active control and spatial filtering". (2012) Trans Tech Publications Switzerland.
	Ultrafast dynamics of four-state magnetization reversal in (ga,mn)as 期刊论文 iSwitch采集 Applied physics letters, 2009, 卷号: 95, 期号: 5, 页码: 3 作者: Zhu, Yonggang; Zhang, Xinhui; Li, Tao; Huang, Xia; Han, Lifen 收藏 \| 浏览/下载：35/0 \| 提交时间：2019/05/12 Gallium arsenide High-speed optical techniques Iii-v semiconductors Kerr magneto-optical effect Magnetic domain walls Magnetic switching Magnetic thin films Magnetisation reversal Manganese compounds Nucleation Optical pumping Semiconductor thin films Semimagnetic semiconductors
	Ultrafast dynamics of four-state magnetization reversal in (Ga,Mn)As 期刊论文 OAI收割 applied physics letters, 2009, 卷号: 95, 期号: 5, 页码: art. no. 052108 作者: Zhang XH 收藏 \| 浏览/下载：90/1 \| 提交时间：2010/03/08 gallium arsenide high-speed optical techniques III-V semiconductors Kerr magneto-optical effect magnetic domain walls magnetic switching magnetic thin films magnetisation reversal manganese compounds nucleation optical pumping semiconductor thin films semimagnetic semiconductors
	The spectral feature analysis of semiconductor thin disk laser (EI CONFERENCE) 会议论文 OAI收割 Optoelectronic Materials and Devices II, November 2, 2007 - November 5, 2007, Wuhan, China 作者: Li J.; Wang L.-J.; Wang L.-J.; Ning Y.-Q.; Li J. 收藏 \| 浏览/下载：23/0 \| 提交时间：2013/03/25 The semiconductor thin disk laser is a new type of semiconductor laser. This work gives the basic operation function of semiconductor disk laser and analyses the heat effect by the experimentally measured photoluminescence spectrum of the laser chip at different pump power and different temperature. We can see that: with increasing pump power the thermal effects of the gain material becomes seriously and causes the saturation of carrier lifetime so the electron-hole pair created in the absorbtion layer have no enough time to rate to one of the wells and the non-radiative recombination happens in the barrier. When the thermal effects becomes stronger the chip will not lasing. This phenomenon is from the smaller energy offset between barrier and quantum well. We optimize the original structure design and experimental technology. A non-absorbing AlGaAs layer who is transparent to the pumping and laser wavelength is added to confine the carriers in the quantum wells. At the same time a DBR with double reflecting band is induced to improve the absorbing efficiency of the pumping light. The single QW is replaced by the three narrow QWs This three QWs structure can add the quantum state of QW increase the recombination probability of carriers in the QWs and reduce the heat effect. The chemical etch equipment is also improved to control the surface unevenness to be within 50 nm.
	Study on LD-pumped Nd:YAG laser cutter (EI CONFERENCE) 会议论文 OAI收割 ICO20: Lasers and Laser Technologies, August 21, 2005 - August 26, 2005, Changchun, China 作者: Zhang G.; Zhang G.; Zhang G.; Zhang J.; Zhang J. 收藏 \| 浏览/下载：22/0 \| 提交时间：2013/03/25 The theory of laser cutter and the technology neck is analyzed. We can conclude that it is almost impossible to deal with the waste thick silicon wafers which are yielded in producing silicon wafers by conventional eroding or diamond cutting when the cutting velocity equals 100mm/min while it is also unperfected with ecumenical laser cutter without good beam quality or precise laseroptics system. It is represented that high average power and high repetition rate laser with good beam quality and precise laseroptics system are pivotal to obtain excellent cutting effect such as thick groove depth double-layer 0.75mm thick silicon wafer can be penetrated.. The cross section is fine and the groove is narrow rapid cutting speed the cutting quality meets the expecting demand. fine kerf section without considering the effect of technique. Considering laser medium thermal lens effect and thermal focal length changing with pumping power using plano-convex high reflectivity mirror as the back cavity mirror to compensate the heat lens influence a /4 waveplate to compensate heat -induced birefraction utilize the Nd:YAG self- aperture effect more than 50 W average power 1.064 um IR output is obtained with beam quality factor (M2) equals 3.19. Through the LD-Pumped Nd:YAG laser cutter we developed with short focus length negative spherical aberration focusing lens double axis linear step motor positioning system suitable beam expander multiplying factor appropriate diameter of exit beam aperture proper repetition rate when the cutting velocity equals 400mm/min 0.75mm thick silicon wafer can be penetrated
	Research on LD-Pumped dual wavelength Nd:YAG Laser with high beam quality for machining (EI CONFERENCE) 会议论文 OAI收割 ICO20: Lasers and Laser Technologies, August 21, 2005 - August 26, 2005, Changchun, China 作者: Zhang G.; Zhang G.; Zhang G.; Zhang J.; Zhang J. 收藏 \| 浏览/下载：33/0 \| 提交时间：2013/03/25 Considering laser medium thermal lens effect and thermal focal length changes with pumping power conventionally lasers are designed to operate in the middle of thermal stable zones where the fundamental mode size is insensitive to thermal perturbation while this method seems impossible when large fundamental mode size is required. Through self-select mode cavity lasers are designed to work at the border of stable zone instead where large fundamental mode size in gain media can be reached. With increase of pumping power and self-aperture mode-selective effect mode size would grow up automatically to a certain value suitable for monomode resonance. With double 180 W pump modules acoustic Q-switch and LBO external frequency-doubled over 28 W which M2 equals 4.5 quasi-CW output green laser and 52W 1.064 um IR output is obtained simultaneity. With the insertion or not of the harmonic separator by footswitch high beam quality green IR and green IR lasers are obtained conveniently.
	Theoretical Aspects of Nucleate Pool Boiling with Dielectric Liquids 期刊论文 OAI收割 JOURNAL OF THERMAL SCIENCE, 1992, 卷号: 1, 期号: 1, 页码: 46，57 Avram Bar-Cohen; Wei Tong; Terrence W. Simon 收藏 \| 浏览/下载：20/0 \| 提交时间：2013/03/13 nucleate pool boiling dielectric liquids thermo-fluid properties dissolved gas contact angle hystereses embryo formation boiling incipience bubble-vapor flow regime wake-pumping effect
	积分球冷原子钟噪声抑制实验研究学位论文 OAI收割作者: 王亚宁 \| 收藏 \| 浏览/下载：72/0 \| 提交时间：2018/12/26 激光冷却 Laser Cooling 积分球 Integrating Sphere 频率综合器 Frequency Synthesizer 光抽运 Optical Pumping 腔牵引效应 Cavity Pulling Effect 频率稳定度 Frequency Stability