| 1. | The normal polarizing device is made of iceland crystal that is based on birefringence of crystal . its merit is high extinction ratio , high transmission and wide wavelength
一般的起偏器件和检偏器件是利用晶体的双折射特性设计而成，其优点是：消光比和透射比高，适用的光谱范围大。 |
| 2. | The temperature dependence of stress - induced hibi - pcfs and the effect of lateral forces on form - induced hibi - pcfs are also investigated . the numerical results are in agreement with the reported experimental results
3 、对结构不对称导致高双折射光子晶体光纤和应力区导致高双折射光子晶体光纤的双折射特性进行了研究。 |
| 3. | Today , most applications of liquid crystal are depend on voltage - dependent birefringence effect . voltage - dependent birefringence of liquid crystal is widely used because of many merits . ( l ) its applicable spectral range is extraordinarily broad
液晶的电控双折射特性之所以应用广泛，主要是因为它有以下几个独特的优点： ( 1 )可应用光谱范围特别宽。 |
| 4. | If a optical anisotropic medium wafer is put into the mid of a polarizer and a analyser , the spectral transmission of the optical system can calculated . the transmission is determine by the birefringence and the thickness of the medium
对各向异性介质处于透光轴相互正交的两个偏振片之间构成的光路，其光谱透过率与介质的延迟量有关，即与介质的双折射特性和厚度有关。 |
| 5. | When we applied electric field , the the oritation of liquid crystal molecule axis reset . it induced the roate of optic axis . at last , the birefringence will change . this is the voltage - dependent birefringence of liquid
例如当对液晶施加电场时，液晶分子轴的排列会变化，从而引起液晶光轴的转动，最终导致了液晶双折射率的变化，这就是我们所说的液晶电控双折射特性。 |
| 6. | The mechanism for optical storage in these materials has been attributed to a statistical reorientation of the azobenzene chromophors perpendicular to the polarization of the incident electric field of the pump laser beam . the photoinduced birefringence and holographic storage in methyl orange dyes ( mo ) doped polyvinyl alcohol ( pva ) films were reported firstly in this thesis . the relationship between the photoinduced birefringence and the dye content and pumping power was investigated by using the writing light of 532 nm ( double - frequency of nd : yag laser ) and the reading light of 632 . 8 nm
本文研究了甲基橙( mo )偶氮苯染料掺杂聚乙烯醇( pva )薄膜的光致双折射和全息光存储特性，利用yag激光2倍频( 532nm )作为写入光， he ? ne激光( 632 . 8nm )作为读出光，研究含有不同染料浓度pva薄膜的光致双折射特性，探讨了光致双折射和泵浦光功率的关系，实现了全息光存储，所得光栅生长曲线包含快过程和慢过程，快过程以异构相位光栅的生长为主，慢过程以取向光栅的生长为主，对此实验结果本文给出了合理的理论解释。 |
| 7. | The paper has five sections include the basic knowledge and the experiment research , systematically analyses the impact of the liquid crystal box ' s position angle on the measuring result of liquid crystal lyot filter and the practical significance of this work . the work of this paper maily includes five sections : ( 1 ) the related theory of the crystal birefringence is systemicly introduced in this paper ; ( 2 ) the theory of the lc voltage - dependent birefringence is introduced ; ( 3 ) no voltage applied , changing curve between the transmission and the liquid crystal box direction is got from experiment ; ( 4 ) voltage applied , changing curve between the transmission and the liquid crystal box direction is got from experiment ; ( 5 ) desired wavelength is extract from changing the direction of liquid box . originality innovation of this paper is that the theory of the lc voltage - dependent birefringence is systemically introduced in this paper especially those related to voltage and direction
本文主要完成以下几方面工作： （ 1 ）比较系统地整理了晶体双折射的有关理论； （ 2 ）简单介绍了液晶的电控双折射特性； o ）在未加电压情况下，研究液晶盒方位角对滤光片透过率曲线的影响；厂）在加交流电压的情况下，研究液晶盒方位角对滤光片透过率曲线的影响； （ 5 ）利用方位角的调整来提取特定波长的谱线；本论文的创新之处在于比较系统地整理了晶体双折射的有关理论，特别是与电压及方向有关的理论，实验得出了滤光片透过率随液晶盒方位角变化的关系曲线，并将之运用于v吸器波长的话线朋 |
| 8. | Then the guided mechanisms of mfs are demonstrated , and waveguide dispersion , leaky loss and effective modal area for both index - induce mf and pbgf are calculated . 2 . on the basis of studying fundamental properties of mfs , the birefringence properties of form - induced and stress - induced hibi - mfs are investigated
2 、在基于对微结构光纤基本性质的研究基础之上,对结构不对称导致高双折射光子晶体光纤和应力区导致高双折射光子晶体光纤的双折射特性进行了研究。 |
