机构

• 长春光学精密机械与物... [2]
• 地理科学与资源研究所 [1]

采集方式

• OAI收割 [3]

内容类型

• 会议论文 [2]
• 期刊论文 [1]

发表日期

• 2023 [1]
• 2006 [2]

学科主题

筛选

浏览/检索结果: 共3条，第1-3条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Characteristics and Driving Mechanism of Urban Construction Land Expansion along with Rapid Urbanization and Carbon Neutrality in Beijing, China 期刊论文  OAI收割 LAND, 2023, 卷号: 12, 期号: 7, 页码: 1388 作者:  Yang, Huicai;  Ma, Jingtao;  Jiao, Xinying;  Shang, Guofei;  Yan, Haiming   |  收藏  |  浏览/下载：28/0  |  提交时间：2023/09/07 construction land expansion  landscape pattern  influencing factors  input-output theory  geographically and temporally weighted regression model  Beijing   Optical fiber transmission of Q-switdied Nd:YAG pulses of 10MW peak power: Mechanism of damage to the fiber (EI CONFERENCE) 会议论文  OAI收割 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies - Advanced Optical Manufacturing and Testing Technologies, November 2, 2005 - November 5, 2005, Xian, China 作者:  Wang L.;  Zhang Y.;  Chen W.;  Tang Y.;  Wang L. 收藏  |  浏览/下载：29/0  |  提交时间：2013/03/25 This paper presents theoretical analysis and experiment results of four different fibers transmitting 10MW peak power Nd: YAG laser pulse. The main factors limiting to optical fiber transmission of high power laser pulse is pointed  including air breakdown at focus area and surface damage of optical fiber. The theory of air breakdown and the fiber coupling conditions is described briefly. The results of study to the transmission properties and damage conditions are presented on the basis of four different types of optical fibers. The results of the experiments are further analyzed in the aspects of transmitting efficiency  air breakdown and surface damage. The local and foreign optical fibers  with plastic-cladding and silica-cladding  and step- index and graded- index fibers are tested separately in the experiments. The experiments showed that the imported fibers are able to transmit up to 10MW peak power laser pulse with no any visible damage  while energy density at the fiber output end surface is 3.54GW/cm2. For local fibers  damage on the input surface of both plastic-cladding and silica-cladding  step-index fibers was found obviously. The column damage to the graded index fiber was also found and investigated in the research. Damage mechanisms of fiber at high peak power laser pulses are summarized. High quality finishing of fiber end surface will improve damage threshold tremendously. The conclusion of the study is that transmitting Q-switched Nd:YAG pulses of 10MW peak power is feasible for the domestically made fibers if their end surfaces are properly processed.   Article I. Design for polymer vertical channel triple coupled microring resonators filter (EI CONFERENCE) 会议论文  OAI收割 ICO20: Optical Communication, August 21, 2005 - August 26, 2005, Changshun, China 作者:  Zhang D.;  Zhang D.;  Wang P. 收藏  |  浏览/下载：131/0  |  提交时间：2013/03/25 This paper proposes a design of polymer Triple Ring Resonators Filter (TRRF) based on silicon substrate. The device structure was demonstrated in order to get wide Free Spectral Ranger (FSR) of the device and a box-like filter response. The transmission equation of the amplitude of input and output lightwaves and coupling coefficients were analyzed by coupling mode theory also.