| 1. | In the following we will expand on this idea in a more realistic model that takes into account the dynamic aspects of the saturation behavior of the laser medium .
下面将这一概念推广到更真实的模型上，在这种情况下，需要考虑激光介质饱和特性的动态变化。 |
| 2. | As a result , yb - doped crystals languished in the shadow of nd : yag and other laser media for several decades waiting for high - power spectrally bright pump sources
上世纪90年代以来,随着ingaas大功率激光二极管的不断发展, yb : yag晶体具备适合ld泵浦的优点重新被人们认识。 |
| 3. | In order to improve the output quality of th e laser , we brought forward the concept of double pre - ionization , which is beneficial for the effective excitation of the laser media in the resonator
为了提高激光器输出性能，我们提出了有利于腔内介质有效激发的双预电离概念。 |
| 4. | The laser crystal also presents other attractive features , such as strong and broad absorption band , makes this laser medium to be an excellent candidate for efficient diode pumping without temperature controlling
该晶体可掺入较高浓度的yb离子( 0 . 5 ? 10 ) ，且不存在浓度猝灭。 |
| 5. | Therefore , either reinforcing the pre - ionization or eliminating the harmful impurity is propitious to increasing the effective excitation of the laser media in the resonator so as to increase the output power
因此增强预电离和消除有害杂质均有利于提高腔内激光介质的有效激发进而提高激光器输出功率。 |
| 6. | 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。 |
| 7. | An accurate model to calculate the laser gain distribution within the laser medium is proposed and an analysis model of thermal effect with varied parameters is deduced . the calculated results were verified by ansys finite elements program
本文建立了精确计算激光介质增益分布的数值模型及给出了激光棒热效应分析的变参数计算模型，其计算结果用有限元程序进行了验证。 |
| 8. | But the life time of krf laser medium is only 2 ns while the pump time of e - beam pump krf laser is over 100 ns . when a 1 ps ultrashort pulse amplified by krf laser amplifier most pump energy is waste . technology of multi pulse amplify can solve this problem
Krf激光器的工作介质是非储能介质，上能态有效寿命约为2 - 3ns ，而电子束的泵浦时间一般为上百ns ，放大超短脉冲激光时绝大部分上能态的储能没有被利用。 |
| 9. | Under high air pressure , a critical problem for the normal discharge is whether enough pre - ionization can be achieved in the laser media or not . however , the cycling pumping oil steam emerging during the flow of the gas mixture and the vapor infiltrating from outside have a strong absorption of the infrared light or a role of counteracting the excitation
在高气压条件下能否正常放电，关键问题是主电极间的激光介质能否获得足够的预电离；而混合气流动过程中出现的循环泵油蒸汽，及从外界渗透的水蒸汽等都对红外光有相当强的吸收作用或消激发作用。 |
| 10. | The stability output second harmonic generation ( shg ) experiment results of single - longitudinal mode and multi - longitudinal mode with long cavity were explained reasonably with these rate equations . the high polarization of fundamental wave in the isotropic laser media nd : yag with type - i critical phase - matching lbo was studied with the rate equations including polarization of fundamental light . using the polarization function of lbo , a quartz full - wave plate was introduced into the cavity , a kind of birefringent filter by considering the combination of the polarization function of the type - i critical phase - matching doubling frequency crystal lbo and the quartz whole - wave plate was constructed
将腔内多纵模倍频速率方程推广应用到准三能级蓝光激光器中，分析了一个纵模、两个纵模、多个纵模时的噪声情况，合理地解释了实验中激光器单纵模运转以及长腔多纵模运转时稳定输出的实验现象，同时利用该速率方程分析了以各向同性激光晶体nd : yag为工作物质，类临界相位匹配lbo为倍频晶体的蓝光激光器中基频光偏振特性，合理利用类临界相位匹配lbo倍频晶体的偏振特性与引入的石英晶体全波片构成双折射滤光片，通过选单频来抑制噪声，获得了蓝光低噪声的稳定输出。 |
