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Heat extraction from hot dry rock by super-long gravity heat pipe: Effect of key parameters 期刊论文  OAI收割
ENERGY, 2022, 卷号: 248, 页码: 13
作者:  
Huang, Wenbo;  Chen, Juanwen;  Cen, Jiwen;  Cao, Wenjiong;  Li, Zhibin
  |  收藏  |  浏览/下载:11/0  |  提交时间:2023/11/21
Simulation analysis of a single well geothermal system with open-loop structure 期刊论文  OAI收割
GEOTHERMICS, 2022, 卷号: 100, 页码: 15
作者:  
Jiang, Kunqing;  Bu, Xianbiao
  |  收藏  |  浏览/下载:17/0  |  提交时间:2023/11/21
Performance of Hybrid Single Well Enhanced Geothermal System and Solar Energy for Buildings Heating 期刊论文  OAI收割
ENERGIES, 2020, 卷号: 13, 期号: 10, 页码: 10
作者:  
He, Yujiang;  Bu, Xianbiao
  |  收藏  |  浏览/下载:34/0  |  提交时间:2020/10/30
Comparison of cavern formation in massive salt blocks with single-well and two-well systems 期刊论文  OAI收割
JOURNAL OF THE CHINESE INSTITUTE OF ENGINEERS, 2016, 卷号: 39, 期号: 8, 页码: 954-961
作者:  
Yi, Liang;  Ren, Song;  Li, Yin-Ping;  Jiang, De-Yi;  Chen, Jie
  |  收藏  |  浏览/下载:28/0  |  提交时间:2018/06/05
Phase characteristics of laser beam in fibers (EI CONFERENCE) 会议论文  OAI收割
5th International Workshop on Adaptive Optics for Industry and Medicine, August 29, 2005 - September 1, 2005, Beijing, China
作者:  
Wang L.;  Wang L.;  Liu J.;  Liu J.;  Liu J.
收藏  |  浏览/下载:28/0  |  提交时间:2013/03/25
The phase changing rates1 of laser beam in single mode polarization maintaining fiber (PMF)  Yb-doped rectangular inner cladding dual-clad fiber (DCF) and Yb-doped large-mode-area dual-clad fiber (LMF) are investigated by means of interference under situations with different exterior disturbance  for situations that all the fibers are used as transmission medium only  as well as amplifying medium with the last two. In this paper  phase fluctuation characteristics of the beam transmitted through the fibers with no amplification are presented. The results show that the phase fluctuation frequencies of the laser beam transmitted through these three kinds of fibers are mainly in the range of 100-200Hz  100-300Hz and 80-400Hz respectively in normal laboratory environment. The phase fluctuation frequencies of the laser beam transmitted through the DCF  in cases of when the environment temperature is changing  a constant pressure is applied to the fiber and when vibration is applied  are mainly in the range of 100-600Hz  100Hz-300Hz and 100-500Hz respectively. In the same cases  for the LMF  the phase fluctuation frequencies are mainly in the range of 150-600Hz  100-400Hz and 100-1000Hz  respectively. It indicates that for realizing phase stabilization  the bandwidth of any potential phase control2 system has to be in the range of a few kilohertz.  
Theoretical analysis of 980nm high power Vertical External-cavity Surface-emitting Semiconductor Laser (VECSEL) (EI CONFERENCE) 会议论文  OAI收割
ICO20: Lasers and Laser Technologies, August 21, 2005 - August 26, 2005, Changchun, China
作者:  
Wang L.-J.;  Wang L.-J.;  Ning Y.-Q.;  Qin L.
收藏  |  浏览/下载:23/0  |  提交时间:2013/03/25
By using bottom-emitting structure  we will develop laser diode (LD) pumped 980 nm VECSEL with active region of InGaAs/GaAsP/AlGaAs system. Because the thickness of barrier layer and absorption layer exceed that of quantum well  single well approximation model (KP method) can be used to calculate the band structure of VECSEL. The Schrodinger equation of finite deep potential well can be adopted to calculate the energy level structures of electron  heavy and light holes. According to the transition selection rule  we theoretically obtained the emitting wavelength of VECSEL and calculated quasi-Femi energy of valence band and conduction band based on the analysis of energy level structure of electron and holes. By analyzing the gain of strained quantum wells  we calculated the gain of VECSEL using transition matrix elements of electron  heavy and light holes. We give out the threshold gain  output power and other characteristic parameters. We will study the configuration of VECSEL and pumping scheme. We designed external cavity mirror  active region and bottom-emitting structure. A LD-pumped vertical external cavity surface-emitting laser whose output power is greater than 1.0 W can be predicted.