| 1. | Study of optical coatings for high power 808nm quantum well laser through experiments
大功率量子阱激光器腔面镀膜实验研究 |
| 2. | The present thesis is devoted to improving the excitation of the laser media ( gas mixture ) in the resonator of the high - average - power tea co2 laser by means of reinforcing the pre - ionization and eliminating the harmful impurity
本文正是从提高预电离及清除混合气中的杂质这两个方面研究改善高平均功率teaco _ 2激光器腔内介质(混合气体)的激发性能的。 |
| 3. | Fiber lasers are very sensitive to environmental perturbations such as temperature fluctuations and mechanical vibrations due to their relatively long cavity length when the external environment changing . the cavity drifting produceing the phase noise and amplitude noise , this can cause the output pulse unstablely
但由于主动锁模光纤激光器腔内有较长的光纤,而光纤的长度极易因外界环境的影响而发生漂移,因而调制频率和腔长很难保持匹配。 |
| 4. | On the basis of this , the effective reflective index with the variation of the carrier density is discussed . this paper also analyzed the random facet phase and the length of the cavity ' s influence on threshold characteristic . especially , the wavelength tuning characteristics have been investigated in detail when one segment works as absorbed region
在此基础上，研究了每一段等效反射率谱曲线随载流子浓度变化的情况；分析了边界相位的不确定性以及激光器腔长对阈值特性的影响；重点讨论了其中一段工作在吸收状态下的波长调谐性质。 |
| 5. | Introducing abcd theory , the laser mode was analyzed ; with thermal effect consideration , a short folded - cavity resonator which was not sensitive to thermal effect was designed . thus , the requirements for efficient doubling frequency were satisfied . 3
采用标准abcd传输矩阵理论，对激光器腔模式进行了详细的分析，在充分考虑热效应的前提下，根据实际情况，合理设计出对热效应不敏感的三镜折叠腔，产生两个光腰，既满足了泵浦光能量的充分利用，也满足了缩小光腰提高倍频效率的要求。 |
| 6. | With the phase - mask method , we make a fiber bragg grating in a few - mode fiber with the peaks at the wavelength around 1060nm . we have studied the temperature dependant characteristics of few - mode fiber bragg gratings theoretical and experimentally . the experimental result of fiber laser based on the few - mode fiber bragg grating is presented
三、在少模光敏光纤中制作了一种波长在1 . 06 m波段的光纤bragg光栅,理论和实验上给出了少模光纤光栅的温度敏感特性,另外将其作为光纤激光器腔镜进行激光选频,给出了实验结果。 |
| 7. | The frequency of the slave laser is not locked to the master laser when the polarization direction of the injected laser is perpendicular to the polarization direction of the slave laser which is free - running . the slave laser frequency shifts toward low frequency because of thermal effect in the slave laser cavity induced by the injected laser
当注入光偏振方向与从激光器输出光偏振方向垂直时，从激光器频率不会被锁定到主激光器频率上，但由于外部光注入引起的从激光器腔内热效应，使得从激光器频率向低频方向移动。 |
| 8. | With the development of infrared tunable opo , its application is more and more wide . lt is possible for us to estimate the quality of resonant mirrors in laser with high energy and to improve the output energy of laser , by measuring the reflectivity of resonant mirrors of coil and df laser by cavity - ring - down which use output wave of opo as the laser source , instead of coil and df laser with high price and huge space
用opo红外输出激光作为光腔衰荡的光源代替价格昂贵、体积庞大的氧碘和氟化氖激光器，对其谐振腔镜的高反射率进行测量，以达到对高功率激光器腔镜高反膜质量的评价，为改进膜系设计、镀膜工艺优化和提高激光器的输出能量提供理论依据。 |
| 9. | Polarization characteristics of laser beam , which is one of the important characteristics of high power laser , have a direct effect on output power , damage threshold of optical elements and beam quality etc . the polarization characteristics in the high power coil resonator is analyzed by jones calculus , and draw a conclusion that , in general the eigen - polarization state is elliptical polarization
激光光束的偏振特性是高功率激光器的一个重要特性之一，直接影响着高功率激光器的输出功率、腔内光学元件的损伤以及光束质量等。本文首先利用琼斯矩阵算法对高功率氧碘激光器腔内的偏振特性进行了分析，并得出结论，谐振腔内的本征振荡一般为椭圆偏振。 |
