排序方式: 共有57条查询结果,搜索用时 187 毫秒
1.
Sang Kyu Lee Min Ju Cho Jung‐Il Jin Dong Hoon Choi 《Journal of polymer science. Part A, Polymer chemistry》2007,45(3):531-542
New photocrosslinkable maleimide copolymers have been synthesized by the attachment of a tricyanopyrrolidene‐based chromophore. The 2‐(3‐cyano‐4‐(2‐{4‐[hexyl‐(6‐hydroxy‐hexyl)‐amino]‐phenyl}‐vinyl)‐5‐oxo‐1‐{4‐[4‐(3‐oxo‐3‐phenyl‐propenyl)‐ phenoxy]‐butyl}‐1,5‐dihydro‐pyrrol‐2‐ylidene)‐malononitrile chromophore exhibits nonlinear optical activity and contains a chalcone moiety that is sensitive to UV light (λ = 330–360 nm) for crosslink formation. The maleimide monomers have also been functionalized with chalcone moieties. The resultant copolymers exhibit great processability, and one of them shows a maximum electrooptic coefficient of 90 pm/V at 1300 nm. We could control the thermal stability of the electrooptic coefficient with the newly synthesized photoreactive copolymers successfully. © 2006 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 45: 531–542, 2007 相似文献
2.
B. F. Myasoedov L. A. Gribov A. I. Pavlyuchko I. V. Rybalchenko G. I. Sigeikin A. F. Kireev V. N. Suvorkin 《Journal of Structural Chemistry》2006,47(3):434-441
For highly toxic organophosphorus compounds on the limiting lists of the International Chemical Weapons Ban Treaty, fragment methods may be used for calculating their IR vibrational spectra; this is shown for O-alkyl alkylfluorophosphonates used as examples. The geometrical parameters and the parameters of the potential and electrooptic functions are found for the major fragments of these compounds. Due to this, fast predictive computation of IR spectra of O-alkyl alkylfluorophosphonates is possible, the accuracy of calculation being sufficient for spectral identification of these compounds; a database of the calculated IR spectra may be created. 相似文献
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基于单通道反射型电光调制器实现不同路光同时调制的方法 总被引:1,自引:0,他引:1
提出了一种利用单通道反射型聚合物电光调制器同时调制不同路光的方法。衰减全反射结构的电光调制器,其每一个衰减全反射(ATR)峰的位置分别对应于一个导波共振模式。实验系统中利用衰减全反射导膜峰作为调制通道,使其每一路光路的入射角分别对应于不同导波共振模式的工作角,就可以实现利用单通道的电光调制器同时调制不同路光。提出了三种实现两路光同时调制的模式,并给出了三种模式的调制结果。结果表明,作为调制通道的导模阶数越低,调制效率越高。在832 nm光波波长下,采用最低阶导模进行调制时可以获得42.9%的调制效率。 相似文献
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应用双面电极的PLZT横向电光调制器电场的精确解 总被引:3,自引:0,他引:3
使用保角变换方法导出了横向电光调制器中双面电极结构的电场和电容的解析表达式,给出了用于PLZT电光陶瓷介质中二次电光效应分析的电场分布的物理图像。通过计算对比表明,双面电极结构电极边级区域由于过剩双折射引起的强度调制非均匀性较单面电极有所改善。 相似文献
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从速率方程出发对双区共腔(common-cavitytwosection简称CCTS)光双稳激光器进行了精确的理论分析与计算,并对其稳态特性进行了实验研究和测试,得出了定量和定性的分析结果,同时还首次发现当激光输出高态出又出现了一次光双稳和开关效应。经研究确认是量子阱探测器的自电光效应,并提出一种可集成双逻辑功能显示的新型网络模型器件。 相似文献
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As electronic operating frequencies increase toward the terahertz regime, new electrooptic modulators capable of low‐voltage high‐frequency operation must be developed to provide the necessary optical interconnects. This Letter presents a new concept that exploits modulation instability to compensate for the intrinsically weak electrooptic effect, χ(2). Simulations demonstrate more than 50 times enhancement of electrooptic effect at millimeter wave frequencies leading to a substantial reduction in the required modulation voltage.
8.
Measurements of the temperature dependence of the quadratic electrooptic coefficient |g1111‐g2211| of ADP were made. The coefficient is found to decrease with an increase in temperature. The results show that the intrinsic quadratic electrooptic coefficient |M1111‐M2211| defined in terms of polarization also dependes on temperature. Employing the temperature dependence of |M1111‐M2211| estimation of antipolarization in lowtemperature antiferroelectric phase of ADP is made. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
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一种飞机综合导航系统的研究 总被引:5,自引:1,他引:4
本文研究了某型飞机综合导航系统的组成及特点,重点研究并推导了大气数据系统、无
线电近程导航系统和光电雷达火控系统校正惯导的原理及其数学模型,并对其导航计算机的
软件进行分析破译。该综合导航系统的设计思想是很有借鉴价值的。 相似文献
10.
Haikuan Kong Jiyang Wang Huaijin Zhang Xin Yin Xiufeng Cheng Yanting Lin Xiaobo Hu Xiangang Xu Minhua Jiang 《Crystal Research and Technology》2004,39(8):686-691
La3Ga5.5Ta0.5O14 (LGT) crystal was grown by using the Czochralski method. The as‐grown crystal is transparent, free from inclusions and with no cracks. Specific heat, thermal expansion, dielectric constants, transmission spectrum and optical damage threshold of LGT have been measured, and the results show general properties of LGT are similar to that of La3Ga5SiO14 (LGS) crystal. The experiment to research the Q‐switch properties of LGT has been performed and the results show LGT possesses smaller electrooptic coefficients than that of LGS and may not be an ideal material used as a Q‐switch. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献