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浏览/检索结果: 共10条，第1-10条 帮助

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Investigation on the Multiwavelength Laser Operation and Polarization Characteristics of Er : YAP Crystal 期刊论文  OAI收割
SPECTROSCOPY AND SPECTRAL ANALYSIS, 2020, 卷号: 40
作者:  Quan Cong;  Sun Dun-lu;  Luo Jian-qiao;  Zhang Hui-li;  Fang Zhong-qing
  |  收藏  |  浏览/下载：26/0  |  提交时间：2020/11/26
Multimodal polarization image simulated crater detection 期刊论文  OAI收割
JOURNAL OF ELECTRONIC IMAGING, 2020, 卷号: 29
作者:  Zhang, Xin;  Zhang, Jingjing;  Wang, Feng;  Liu, Xiao;  Wu, Jun
  |  收藏  |  浏览/下载：22/0  |  提交时间：2020/11/26
Effect of microstructure and Ag3Sn intermetallic compounds on corrosion behavior of Sn-3.0Ag-0.5Cu lead-free solder 期刊论文  OAI收割
Journal of Materials Science-Materials in Electronics, 2014, 卷号: 25, 期号: 12, 页码: 5269-5276
M. N. Wang; J. Q. Wang; W. Ke
收藏  |  浏览/下载：17/0  |  提交时间：2015/01/14
An investigation of benzimidazole derivative as corrosion inhibitor for mild steel in different concentration HCl solutions 期刊论文  OAI收割
Corrosion Science, 2011, 卷号: 53, 期号: 1, 页码: 113-121
X. M. Wang; H. Y. Yang; F. H. Wang
收藏  |  浏览/下载：29/0  |  提交时间：2012/04/13
COMPARATIVE STUDY OF CLINICALLY USED NiTi ORTHODONTIC WIRES 期刊论文  OAI收割
International Journal of Modern Physics B, 2010, 卷号: 24, 期号: 30, 页码: 5929-5937
Q. A. Wang; Y. Zhang; F. Y. Hao; K. Yang; L. L. Tan
收藏  |  浏览/下载：13/0  |  提交时间：2012/04/13
Rearrangeable nonblocking 88 matrix optical switches based on extended banyan network (EI CONFERENCE) 会议论文  OAI收割
作者:  Zhang Y.
收藏  |  浏览/下载：29/0  |  提交时间：2013/03/25
Based on the CROSSBAR network (CN) and the BANYAN network (BN)  8 matrix optical switch  two new rearrangeable nonblocking constructions of extended BANYAN network (EBN) are proposed for implementing 88 optical matrix switch. The interconnection characteristics of these two types of rearrangeable nonblocking EBN were studied  optical insertion loss of 4.6 dB  and the logic program for driving switching units was provided. The calculated insertion loss was 3.3 dB for 88 optical matrix switch. Silica waveguide 88 matrix optical switch was designed and fabricated according to the calculated results. The silica waveguide propagation loss of 0.1 dB/cm and waveguide-fiber coupling loss of 0.5dB/point were measured. With the fabricated 87times  cross-talk of -38 dB  polarization dependent loss of 0.4 dB  averaged switching power of 1.6 W  and switching time of 1 ms were achieved. A basic agreement between experimental results and theoretical calculated values was achieved.  
Novel fast measurement method of twist angle and optical retardation of liquid crystal display (EI CONFERENCE) 会议论文  OAI收割
Asia Display 2007, AD'07, March 12, 2007 - March 16, 2007, Shanghai, China
Huang X.; Lu Y.-T.; Kong X.-J.; Jing H.; Fu G.-Z.; Jin H.
收藏  |  浏览/下载：15/0  |  提交时间：2013/03/25
A novel method is proposed to measure twist angle and optical retardation of liquid crystal display in this paper. The new method which is one of single-wavelength methods has three characteristics  introducing a method of measuring the total intensity ratio of the transmitted light to eliminate the influence of absorption by the polarizer  using circularly and homogeneously aligned LC cell (CH-LC) as a unique polarization-converting device  analyzer  using variable sector diaphragm and photodetector to detect the total intensity of transmitted light whose original polarization direction is continuously changed from 0 to arbitrary angle  CH-LC  liquid crystal display and so on. The twist angle () and optical retardation (nd) can be derived by using Jones matrix analysis and a curve fitting where and nd are fitting parameters. Experiment proved the results are accurate  the process of operation is fast  the devices are economical.  
Rearrangeable nonblocking 88 matrix optical switch based on silica waveguides and extended banyan network (EI CONFERENCE) 会议论文  OAI收割
Science and Technology of Dielectrics for Active and Passive Photonic Devices - 210th Electrochemical Society Meeting, October 29, 2006 - November 3, 2006, Cancun, Mexico
作者:  Zhang Y.
收藏  |  浏览/下载：30/0  |  提交时间：2013/03/25
Based on the CROSSBAR network (CN) and the BANYAN network (BN)  two new rearrangeable nonblocking constructions of extended BANYAN network (EBN) were proposed for implementing 88 optical matrix switch. The interconnection characteristics of these two types of rearrangeable nonblocking EBN were studied  and the driver logic program of switching units was provided. The calculated insertion loss is 3.3 dB for 88 optical matrix switch. Silica waveguide 88 matrix optical switch was designed and fabricated according to the calculated results. The silica waveguide propagation loss of 0.1 dB/cm and waveguide-fiber coupling loss of 0.5dB/point were measured out. With the fabricated 88 matrix optical switch  optical insertion loss of 4.6 dB  cross-talk of -38 dB  polarization dependent loss of 0.4 dB  averaged switching power of 1.6 W  and switching time of 1 ms were achieved. A basic agreement between experimental results and theoretical calculated values was achieved. copyright The Electrochemical Society.  
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：30/0  |  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.  
偏振无关合束光栅的热畸变研究 学位论文  OAI收割
作者:  李林欣
  |  收藏  |  浏览/下载：84/0  |  提交时间：2018/12/26