彩虹全息图的假彩色编码方法

本文在三基色原理的基础上，分析了在彩虹全息术中的两种假彩色编码方法——多狭缝假彩色编码方法和参考光假彩色编码方法。     

Dependence of the laser-induced voltages on the oxygen content in normal state YBa2Cu3O7−δ films

Our investigation on the relation between oxygen content and the laser-induced voltages of the YBa₂Cu₃O_7−δ films in normal-state shows that deoxygenation of the superconducting films reduces the laser-induced voltages greatly, even reverses the sign of the signals at large oxygen deficiency. The absolute value of the negative signal at large oxygen deficiency can be greater than that of the positive signal.     

Zeeman transitions in deuterium atoms induced by ultra-relativistic electrons

We present data showing hyperfine transitions in an atomic deuterium beam induced by the (476 MHz) radio-frequency field of a 704 MeV electron beam in a storage ring. A polarized deuterium beam, produced in an atomic beam source, was crossed with a stored electron beam and analyzed with a Breit--Rabi polarimeter. Electron-beam induced transitions were singled out by injecting different combinations of hyperfine states. Transition probabilities as high as 70% were measured at large currents (~ 100 mA). All possible deuterium transitions for a radio-frequency of 476 MHz were observed. In addition, a 1--6 transition resulting from the first harmonic (952 MHz) was observed. The effects of these transitions are of general importance for the polarized internal target technique applied in nuclear and particle physics experiments. The data are reasonably described by numerical estimates. The observed mechanism can be exploited to create nuclear polarized atoms when injecting electron polarized atoms with no net nuclear polarization into a storage cell. However, when nuclear polarized atoms are injected, care should be taken to avoid this mechanism, since it would result in depolarization of the atoms. The studies enabled us to choose the magnetic guide field during our spin-dependent electron--deuteron scattering experiments, such that electron-beam induced depolarizing effects were avoided. This revised version was published online in July 2006 with corrections to the Cover Date.     

Vibrational spectrum of uridine obtained by means of nonresonant-background-free CARS spectroscopy

Received: 18 June 1996/Revised version: 3 January 1997     

圆柱对称光脉冲在负色散克尔介质中的传输

利用变分法得到了任意光脉冲传输的一般特性及高斯光脉冲压缩（或扩展）的必要条件，这说明在一定初始条件下时空非对称的光脉冲也可形成“光子弹”，在某些区域内，通过时空耦合作用，光束的空间会聚可以导至脉宽的压缩。     

一种实用的准单色光退偏器的研究

用矩阵方法对一种准单色光退偏器Ｌｙｏｔ改进型退偏器进行了详细的理论分析，得到了该退偏器的有效退偏条件为：１）退偏器的总延迟必须足够大；２）晶体楔角或通光孔径必须足够大；３）二晶体光轴夹角必须是４５°。实验表明，该退偏器在４００～８００ｎｍ宽光谱范围内对±１０ｎｍ的任意准单色偏振光进行退偏后，平均的残余偏振度小于１．２％。     

1.5μm波导声光可调滤光器研究

对１．５μｍ波导型声光ＴＥ－ＴＭ模式转换光滤波器进行了研究。采用了可降低驱动功率的表面声波导结构。在１．５￣１．６μｍ波段实现了可调滤光，通带宽度小于２ｎｍ，达到９７￥以上转换率所需的射频驱动功率约８０ｍＷ（１９ｄＢｍ），器件总插入损耗约９ｄＢ。     

一种五波长半导体激光生物组织辐照仪

采用GaAlAs单量子阱半导体激光器和LD泵浦的Nd:YVO4－KTP倍频激光器等研制了国内首台可从光导纤维输出5种波长的半导体激光生物组织辐照仪,该仪器已在激光生物医学领域投入应用．     

相对论磁控管的实验研究

简要分析了相３对论磁控管的主要特点与问题，编制了谐振系统数值计算程序，通过数值计算与冷测，对不同阴极尺寸与输出结构的磁控管进行了研究，清晰地描述了磁控管的振荡模式与简并现象。制作了Ａ６型相对论磁控管并进行了热测实验，研究了输出功率与工作磁场的关系，经过大量优化工作，在Ｓ波段获得了３８０ＭＷ的微波辐射。     

静电场与涡旋电场无限大平面的电通量

讨论了静电场和涡旋电场在无限大平面上的电通量。提出了关于涡旋电场无限大平面电通量等于零的假设。