非线性材料已经用于光折变开关。
Nonlinear materials have been well established as photo refractive switching material.
测试了晶体的光折变阈值、双折射梯度和消光比。
The optical refraction threshold. birefringent gradient and extinction ratio were measured.
对高速调幅光束的光折变四波混频进行了理论研究。
Photorefractive four wave mixing with rapidly amplitude modulated beams is studied theoretically.
本文主要对光折变空间光孤子的时间行为进行了研究。
The temporal behavior of photorefractive spatial solitons is studied in this thesis.
光折变聚合物是90年代出现的一种新型功能高分子。
Photorefractive polymer is a novel functional polymer reported at beginning of 1990 '.
搀杂铌酸锂晶体是目前最理想的三维光折变存储材料。
Up to date, the doped lithium niobate crystal is the most ideal three dimensional storage materi...
基于和时间有关的带输运模型，建立了光折变孤子的演化方程。
Based on time dependent band transport model, the evolutional equation of PR solitons is established.
在光折变过程中，光波对掺杂中心的激发系数S是一个重要的物理量。
The photon-excitation coefficient S is important in the process of photorefraction.
用单载流子一能级带导模型讨论了光折变晶体双光束耦合的温度特性。
The temperature characteristics of two-beam coupling in photorefractive crystal was discussed by using the one-carrier and one-level band-conduction model.
结果显示，非均匀性致使光折变光栅的平均强度减弱，衍射效率降低。
The average saturation space-charge field is small and the diffraction efficiency is low as a result of the non-uniformity of the grating.
具有双光子光折变效应的光折变介质温度的变化对光伏孤子性质具有影响。
The characteristic of the photovoltaic spatial solitons in two-photon photorefractive media is influenced by the temperature of the media.
测试了晶体的指教增益系数、衍射效率、相位共轭反射率和响应时间等光折变性能。
The exponential gain coefficient , diffractive efficiency , phase conjugate reflectivity and the response time were measured.
利用不同的结构光辐照光折变晶体，可以制作具有不同结构的光波导以及光波导阵列。
Various optical waveguides and waveguide arrays can be fabricated by irradiations of different structure lights.
研究了稳态情况下一维宽光束在有偏压双光子中心对称光折变晶体中的调制不稳定性。
The modulational instability of one-dimensional broad optical beams in biased two-photon centrosymmetric photorefractive crystals under steady-state conditions has been investigated.
在顺电相光折变晶体中存储全息相位光栅是研制一种新型的电控全息光开关的有效途径。
The holographic grating storage in photorefractive crystal in paraelectric phase is an available approach to develop a new style electroholography switch.
预言了亮-亮，暗-暗和亮-暗非相干耦合空间孤子对可存在于中心对称光折变介质中。
Incoherently coupled dark-dark , bright-bright and bright-dark screening soliton pairs in centrosymmetric photorefractive crystals are possible due photorefractive effect.
实验归纳了支化聚甲基苯基硅烷薄膜的光折变规律，获得了控制薄膜厚度和折射率的定量条件。
The quantity conditions of film thickness and refractive index control were acquired. The basic facture technics of branched PMPS waveguide circuit was established.
根据单轴晶体的折射率椭球，从理论上分析了光折变体光栅的衍射效率与读出光偏振态的关系。
According to the refractive index ellipsoid of uniaxial crystal, the relationship between diffraction efficiency of volume grating and polarization state of readout beam is theoretically analyzed.
首先，通过后重氮偶合方法合成了一系列含咔唑基多功能生色团的光折变聚磷腈P6-P10。
Post-azo-coupling reaction was successfully applied to synthesize a series of photorefractive polyphosphazenes P6-P10 containing carbazole-based multifunctional chromophores.
并对二者的结构以及相应光折变体系的玻璃化温度以及极化处理中材料性能的改变进行了表征和测试。
The structure of tow dyes, the glass-transition-temperature (T_g) of their according PR materials and the properties change after corona-onset poling were characterized and tested in the experiment.
由于光折变晶体的光伏常数依赖于波长，因而选则不同波长的背景光和信号光进行理论分析和实验研究。
For PV constant of PR crystal depending on wavelength, we choose different signal and background beam in theory analysis and experiment.
基于光折变晶体体全息存储和子波相关理论，本文提出并构建了一个新型的多通道体全息子波相关识别系统。
Based on the theories of volume holographic storage and wavelet transform, a novel multi channel correlation system is proposed and constructed.
光折变空间光孤子是指当光折变材料的自聚焦效应与光束的衍射发散作用相平衡时，在介质内无衍射向前传播的光束。
Photorefractive (PR) spatial solitons form when the self-focusing of a light beam inside the PR material exactly balances the diffraction of the beam.
研究结果表明：采用合适的光场强度分布以及合适的外加电场可以在不同光折变晶体中写入平面波导阵列和通道波导阵列。
Employing writing beams with appropriate intensity distributions and external electric fields along proper directions, arrays of planar and channel waveguides can be fabricated in various pr crystals.
通过将物质方程与耦合波方程联立数值求解， 可得到光折变光栅形成过程中两波耦合增益系数以及光束条纹相位的变化。
Material equations and coupled wave equations are jointly solved to get the coupling coefficient and phase shift of light pattern during the dynamic procedure of photorefractive grating formation.
用解析方法和数值方法在理论上研究了光折变晶体中的稳态矢量空间光孤子及有偏压光伏光折变晶体中光束的调制不稳定性；
The steady state vector spatial solitons in photorefractive crystals and the modulation instability in biased photorefractive-photovoltaic crystals are studied by both analytic and numerical methods.
光折变光孤子具有光强阈值低、存储时间长，二个横向维稳定和依赖于波长等特性，在光学信息处理和集成光学中具有广阔的应用前景。
For the merits of low optical power, long storage time, two dimensions stable and depend on wavelength, pr solitons are prospective in optical information processing and integrated optics.
文章研究了掺铁铌酸锂晶体在激光辐射下的电荷输运迁移，探讨了光折变过程中光生载流子的漂移、扩散、光致电压以及空间电荷场的动态过程。
The storage dynamics in doped lithium niobate are studied. It gives that the equations of the migration of charges is due to diffusion or drift and photovoltaic effect.
文章研究了掺铁铌酸锂晶体在激光辐射下的电荷输运迁移，探讨了光折变过程中光生载流子的漂移、扩散、光致电压以及空间电荷场的动态过程。
The storage dynamics in doped lithium niobate are studied. It gives that the equations of the migration of charges is due to diffusion or drift and photovoltaic effect.
应用推荐