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浏览/检索结果: 共6条，第1-6条 帮助

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Beam Optics Analysis for the 120-keV Multiaperture Accelerator of Neutral Beam Injector 期刊论文  OAI收割
FUSION SCIENCE AND TECHNOLOGY, 2024
作者:  Chen, Yuqian;  Liu, Longbin;  Xie, Yahong;  Wei, Jianglong;  Gu, Yuming
  |  收藏  |  浏览/下载：6/0  |  提交时间：2024/11/20
Feasibility Analysis of 1-D Carbon Material in Application of Negative Particle Beam Diagnostics 期刊论文  OAI收割
FUSION SCIENCE AND TECHNOLOGY, 2017
作者:  Xu YJ(许永建);  Li Zhang;  Ling Yu;  Yahong Xie;  Caichao Jiang
  |  收藏  |  浏览/下载：25/0  |  提交时间：2022/12/27
High power Bragg reflection waveguide diode lasers with twin near-circular emission spots (EI CONFERENCE) 会议论文  OAI收割
2012 IEEE Photonics Society Summer Topical Meeting Series, PSST 2012, July 9, 2012 - July 11, 2012, Seattle, WA, United states
作者:  Wang L.;  Wang L.;  Wang L.
收藏  |  浏览/下载：21/0  |  提交时间：2013/03/25
Modeling and analysis of dialyte-lens auto-focusing technology for theodolite (EI CONFERENCE) 会议论文  OAI收割
2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications, November 16, 2008 - November 19, 2008, Beijing, China
Wu L.-T.; Qiao Y.-F.; Wu D.-K.; Cai S.
收藏  |  浏览/下载：25/0  |  提交时间：2013/03/25
In order to realize real-time auto-focusing for theodolite  lens-apart method was designed with the corresponding math model built and analyzed. An Object beam splitted after the first image surface of the theodolite traveled through two dialyte lens and then was imaged on CCD. The distance between two spots when exactly focused was set as the calibration value  and the relationship between defocus distance and spot offset was given. The influence of tracking center shift and divergence angle etc. on focusing accuracy was analyzed. Compared with the traditional focusing method  this scheme has a higher accuracy  faster calculation  higher tolerance for environment temperature and a simpler construction. The experiment result exhibited a resolution higher than 0.056mm  which shows a bright engineering application prospect for this method. 2009 SPIE.  
High power VCSEL device with periodic gain active region (EI CONFERENCE) 会议论文  OAI收割
Optoelectronic Materials and Devices II, November 2, 2007 - November 5, 2007, Wuhan, China
作者:  Zhang Y.;  Liu Y.;  Liu Y.;  Liu Y.;  Qin L.
收藏  |  浏览/下载：31/0  |  提交时间：2013/03/25
High power vertical cavity surface emitting lasers with large aperture have been fabricated through improving passivation  lateral oxidation and heat dissipation techniques. Different from conventional three quantum well structure  a periodic gain active region with nine quantum wells was incorporated into the VCSEL structure  with which high efficiency and high power operation were expected. The nine quantum wells were divided into three groups with each of them located at the antinodes of the cavity to enhance the coupling between the optical field and the gain region. Large aperture and bottom-emitting configuration was used to improve the beam quality and the heat dissipation. A maximum output power of 1.4W was demonstrated at CW operation for a 400m-diameter device. The lasing wavelength shifted to 995.5nm with a FWHM of 2nm at a current of 4.8A due to the internal heating and the absence of active water cooling. A ring-shape farfield pattern was induced by the non-homogeneous lateral current distribution in large diameter device. The light intensity at the center of the ring increased with increasing current. A symmetric round light spot at the center and single transverse mode operation with a divergence angle of 16 were observed with current beyond 4.8A.  
基于正交频率变换的高功率蓝绿全固态激光器 期刊论文  OAI收割
中国激光, 2007, 卷号: 34, 期号: 12, 页码: 1634, 1638
戎善奎; 余婷; 周军; 陈卫标
收藏  |  浏览/下载：2801/211  |  提交时间：2009/09/18