实现Na2b^3∑g^＋-x^3∑u^3辐射的新途径

本文报道了用共振泵浦Na（3P）态，通过Na（3P）＋Na（3S）复合而获得Na2（b^3∑g^＋）态粒子数布居的可能，以及用双光子共振泵浦Na（4D）态获得b^3∑g^＋-x^3∑u^3受激发射。     

单池受激布里渊散射脉冲波形的研究

实验研究了单池系统的结构参数对受激布里渊散射（ＳＢＳ）脉冲波形的影响,通过改变透镜焦距、透镜与池的距离可以很容易地在１．５～８ ｎｓ之间调节ＳＢＳ脉冲宽度。利用含有受激布里渊散射噪声的理论模型对ＳＢＳ脉冲波形进行了数值模拟,理论与实验符合较好     

Optical phase conjugation by resonant degenerate four-wave mixing in liquid phase medium

In this paper, frequency-doubled Nd:YAG laser's phase conjugation has been investigated experimentally using resonant degenerate four-wave mixing (DFWM). The iodine solution was used as resonant medium. In this way, the energy of the DFWM phase conjugation beam arrived at 43μJ/pulse while the total pump beam's energy reached 8mJ/pulse. The relation between the pulse energy of the DFWM phase conjugation beam and that of the pump beam was investigated. We also measured the optical field distributions of pump beam and DFWM phase conjugation beam, from which it can be noticed that the DFWM phase conjugation can improve the laser beam quality. At the same time, we observed the influence of the pump beam's disturbance on the DFWM signal.     

红宝石相位共轭激光器泵浦的KTP光学参量振荡器

光参量振荡器的阈值与泵浦光的光束质量有极大的关系,为降低光学参量振荡器起振阈值,本实验将受激布里渊散射相位共轭效应引入光学参量振荡器的泵浦源中,以改善光束质量,使光学参量振荡器振荡阈值降低到原来的２５％－７％。     

Li_2的405～460nm范围内的吸收及发射谱

本文报道了锂双原子分子在405～460nm范围内的吸收谱,吸收峰在422.5nm和450nm附近,两个吸收峰应来自x~3∑_u~+→2~3II_g的吸收跃迁.激光泵浦得到了456nm附近的感生荧光谱,并对这一谱带的发射机理进行了讨论.     

强激光在液体介质中传播STRS的研究

受激热瑞利散射(STRS)和受激热布里渊散射(STRS)是影响小尺度热晕不稳定性的重要因素,小尺度热晕不稳定性在激光大气传输不可避免,因此对受激热散研究具有重要意义: STRS发生在一些对入射光具轻微吸收作用的介质中,实验中,我们首先对液体吸收     

后向耦合拉曼净化实验研究

用红宝石激光泵浦高压H_2进行了后向耦合拉曼净化实验,获得种子光(近衍射极限)放大64倍,转换效率达32％的结果。并探讨了耦合放大系数随种子光、泵浦光及气压等的变化规律。     

激光束耦合叠加的理论研究

提出一种用以实现激光光束耦合叠加的方法。采用共轭梯度算法进行的二维数值模拟结果表明,在衍射光学元件位相16阶量化的情况下,可以实现的理论效率、误差分别为94.8%,2.4%,并对误差进行了分析。     

Selection of Acquisition Scan Methods in Intersatellite Optical Communications

In this paper, a theoretical model of the acquisition in intersatellite optical communications (IOC) is founded with the assumption that beacon pointing errors could be modeled as Gaussian random variables. An optimal scan method should be chosen according to the average acquisition time under a certain acquisition probability. With analysis of the most common scan methods during the establishment of IOC, the raster-spiral scanning can substitute the spiral scanning is found. The raster scanning and raster-spiral scanning are simulated using Monte Carlo method and the result shows the first one is optimal for acquisition in IOC.     

在激光大气传输中利用SBS阈值效应实现小面积信标的研究

 在理论上建立起将受激布里渊散射（SBS）与激光大气传输过程相结合的激光补偿传输的数学模型,并进行了数值模拟，提出并证明了利用SBS阈值效应可以将相位共轭光会聚到目标上一个小面积上，从而在目标上主动获得小面积信标光斑。利用SBS实现激光大气补偿传输（传输距离250m）的实验研究,证实了上述理论预期。