机构

• 上海光学精密机械研究... [2]
• 长春光学精密机械与物... [1]
• 长春应用化学研究所 [1]
• 西安光学精密机械研究... [1]

采集方式

• OAI收割 [5]

内容类型

• 学位论文 [2]
• 期刊论文 [2]
• 会议论文 [1]

发表日期

• 2012 [1]
• 2009 [1]
• 2008 [1]

学科主题

• 光学工程 [2]
• instrument... [1]

筛选

浏览/检索结果: 共5条，第1-5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 Mode-locked thulium-doped fiber laser with a narrow bandwidth and high pulse energy 期刊论文  OAI收割 laser physics letters, 2012, 卷号: 9, 期号: 8, 页码: 587-590 作者:  Zhou, W.;  Shen, D. Y.;  Wang, Y. S.;  Long, J. Y.;  An, Y. 收藏  |  浏览/下载：27/0  |  提交时间：2012/09/04 fiber lasers  thulium-doped fiber  passively mode-locking  narrow bandwidth   Fluorene-Based Copolymers Containing Dinaphtho-s-indacene as New Building Blocks for High-Efficiency and Color-Stable Blue LEDs 期刊论文  OAI收割 macromolecular rapid communications, 2009, 卷号: 30, 期号: 9-10, 页码: 816-825 Guo X; Cheng YX; Xie ZY; Geng YH; Wang LX; Jing XB; Wang FS 收藏  |  浏览/下载：16/0  |  提交时间：2010/05/04 LIGHT-EMITTING-DIODES  CONJUGATED POLYMERS  ELECTROLUMINESCENT POLYMERS  SPECTRAL STABILITY  NARROW BANDWIDTH  ENERGY-TRANSFER  GREEN EMISSION  POLYFLUORENE  BAND  RED   A high-accuracy parameter estimation algorithm for jointless Frequency-shift track circuit (EI CONFERENCE) 会议论文  OAI收割 ISECS International Colloquium on Computing, Communication, Control, and Management, CCCM 2008, August 3, 2008 - August 4, 2008, Guangzhou, China 作者:  Zheng X. 收藏  |  浏览/下载：21/0  |  提交时间：2013/03/25 FSK (Frequency Shift keying) signal  which has advantages of narrow-bandwidth  strong anti-interference ability  long transmission distance and so on  is used in jointless Frequency-shift track circuit to send different kinds of control signals. However  as FSK is non-linearly modulated  parameter estimation with high accuracy is hard to realize. Based on the spectrum analysis complement with time-frequency distribution  a highaccuracy FSK signal parameter estimation algorithm is put forward in this paper. According to the signal characteristics  under-sampling and ZFFT are used to improve the accuracy of spectrum analysis  and the base frequency resolution meets system requirement of 0.02Hz. Wigner-Ville distribution has an excellent time-frequency concentration while serious cross-term interference at the same time. Through the design of kernel function  the cross-terms are almost suppressed and the upper/down side frequency resolution meets the system requirement of 0.2Hz. The effectivities of all the methods mentioned above have been proved by MATLAB simulation  which pave a solid way for the development of high-accuracy FSK signal parameter estimation devices. 2008 IEEE.   宽调谐、窄线宽中红外PPMgLN晶体双共振光学参量振荡技术 学位论文  OAI收割 作者:  董怡静   |  收藏  |  浏览/下载：29/0  |  提交时间：2018/12/26 光学参量振荡器  optical parametric oscillator  窄线宽  narrow bandwidth  准相位匹配  Quasi phase matching  宽调谐  Wide tunable  PPMgLN  PPMgLN   高功率窄谱宽1918nm掺铥光纤激光技术研究 学位论文  OAI收割 作者:  张伟   |  收藏  |  浏览/下载：21/0  |  提交时间：2018/12/26 掺铥光纤激光器（TDFL），1918nm，高功率，窄谱宽  TDFL, 1915nm, high power, narrow-bandwidth