| 1. | Using the beam propagation method ( bpm ) simulation , we confirm that wide controllability of the branching ratio and low excess loss can be realized by this structure
用bpm方法模拟的结果表明，此结构实现了50 - 94的不对称分支比，并且具有低的附加损耗的特点。 |
| 2. | Site - select spectra indicate that the eu3 + in nanoparcles < wp = 7 > formed two kinds of luminescence centers with different branch ratios of 5d0 - 7fj . the ratio of varied with different excitation
用不同能量激发zns时5d0 7f0与5d0 7f1发光分支比不同，表明激发能量对两类发光中心的激发具有选择性。 |
| 3. | Some microscopic theoretical analysis indicates the branching ratio of the transitions near zero degree is not sensitive to the halo structure . the complete angular distribution of the " h ( 6he , 6li ) n reaction has to be measured to reveal the halo structure of the second exited state of 6li
有的微观理论分析表明， 0附近的该跃迁强度比对是否存在晕结构不敏感，要想揭示~ 6li第二激发态的晕结构，应该测量~ 1h ( ~ 6he ， ~ 6li ) n反应完整的角分布。 |
| 4. | The author has calculated the spontaneous radiate probabilities , the linear oscillator strengths , branching ratio of tm3 + iones by judd - oflet theory . according to the j - o calculated data , the transition 1g4 ? 3h6 was stronger than the transition 1g4 ? 3h4 . it was agreement with the emission spectra
3 ）对tbzre玻璃，用j ? o理论计算了各光谱参数，从1g4能级的跃迁分支比从理论上得出480nm波长的光相对650nm波长的光强，这与发射光谱图是相符合的。 |
| 5. | A wide range of the branching ratio can also be achieved for the asymmetric case . using supermode theory , i compared the design results of directional coupler by means of 2d mode and 3d mode and designed 3db directional coupler using 3d bpm and couple mode theory
实际的设计过程中，考虑到定向耦合器输入波导和输出波导部分的耦合影响，围绕耦合模理论计算结果手动调节耦合区长度，并应用三维bpm来模拟设计，得到耦合区长度，设计了精确的3db定向耦合器。 |
| 6. | 5 . the luminescence enhancement of eu3 + was also observed after ultraviolet irradiation but was weaker than the zns : mn2 + and the branch ratio of 5d0 - 7f0 increased after irradiation . it indicates probably the contribution from the centers in the surface of nanoparticles increased
在紫外光的辐照下首次观察到eu3 +离子发光的荧光增强现象，辐照后5d0 < wp = 5 > 7f0发射强度分支比增加，表明对称性较低的发光中心对发光的贡献增加，可能是处于颗粒表面的eu3 +离子对发光的贡献增加。 |
