| 1. | This thesis mainly focuses on the generation of blue light by utilizing the external frequency doubling with knbo3 . following is about the contents . 1
其主要内容如下： ( 1 )从理论上分析了knbo _ 3晶体外腔谐振倍频的产生原理。 |
| 2. | Avalanche diode is the traditional solid device to obtain millimeter wave source . the high order frequency multiply technology of avalanche diode is reported very scarcely
雪崩二极管是传统的毫米波固态功率源器件,但利用雪崩二极管实现高次倍频的研究却报道甚少。 |
| 3. | Flow separation produces pressure fluctuations of large amplitudes , possibly with the dominant frequencies differ from up - stream blade wake passing frequency and its harmonics
尾缘气流分离产生的压力波动频谱中含有上游叶片尾迹频率及其倍频的分量，但其频谱可能比较复杂，并非单一地受上游叶片尾迹影响。 |
| 4. | Point originally possessed the harmful interference of the frequency s every kind of times . enlarge 1 khz sine wave the hour will produce 2 khz of two times wave with 3 khz of three times wave wave for and much higher time
指原有频率的各种倍频的有害干扰。放大1khz正弦波时将会产生2khz的二次谐波和3khz的三次谐波以及许多更高次的谐波。 |
| 5. | In this paper , we design a new film stack by use of multi - frequency design idea , which decrease the film thickness of high refraction layers greatly , and the damage threshold of it will be improved hopefully . and at the base of this film stack , by optimizing the film thickness of several outmost layers , we design the hr film at 45 incidence for 632 . 8nm and 1315nm with 180 ? or 90 phase retardance at 1315nm
随着高功率coil输出功率的进一步提高，传统的设计膜系已逐渐不能满足需要，为此我们利用倍频的没计思想，设计出了一种新的高反射膜系，与传统的设计膜系相比，此膜系大大降低了高折射率层的厚度，使得膜系的损伤闽值有望得到极大提高。 |
| 6. | The phase matching and group velocity matching conditions of type - i and type - ii second harmonic generation ( shg ) are obtained according to the momentum and energy conservation laws . the group velocity delay of ultrashort pulse shg on clbo and the crystal length decided by the group velocity delay are analyzed and compared with bbo ' s
从动量守恒、能量守恒出发推导得出了超短脉冲倍频的类、类相位匹配和群速匹配条件，对clbo晶体用于超短脉冲倍频时的群速延迟以及由群速延迟决定的晶体长度进行了分析和数值模拟，并与bbo晶体进行了比较。 |
| 7. | The dissertation discussed the theories of second - harmonic generation for negative uniaxial optical crystal and summarized properties of nonlinear optical crystals , which are subjected to ultraviolet second - harmonic generation , and represented the theorizational law of double frequency crystal select ( tldfcs ) . at present , bbo crystal is the most subjected to commercial crystal of ultraviolet second - harmonic generation according to compared kdp , bbo , clbo , kabo and kbbf crystals based on tldfcs
论述了负单轴晶体的倍频理论，总结了适用于紫外倍频的非线性光学晶体的特性，提出了倍频晶体选择的理论依据，并根据该依据通过比较，最后选定bbo晶体为目前最适宜用于产业化的紫外倍频晶体。 |
| 8. | The system is of some sense of stereovision and can emancipate the operators from the shackles of microscope eyepieces . flicker is a fatal drawback of the system . based on the analysis of the whys of the flicker phenomenon a kind of flicker - free three - dimensional imaging system based on frequency duplication is then designed
从模拟时分立体成像系统到基于倍频的无闪烁立体成像系统，再到带视频信号处理功能的无闪烁立体成像系统，围绕着实现立体、消除闪烁、增强图像显示效果等三方面对时分式立体显示系统进行了深入的研究。 |
| 9. | So , in the process of laser powder rapid micro - fabrication , to gain the fine light solidification unit , mainly should adopt two following aspects : 1 . using the laser that has the mini - focus spot . usually select the doubling frequency laser or fiber laser
要想获得细小的光固化单元,对于激光粉末快速微成形工艺而言,主要从下面两个方面入手: 1 .使用光斑直径细小的激光器2 .选择粉末颗粒直径小的金属粉末作为激光粉末快速微成型固化材料为了解决精细聚焦问题,我们采用nd : yag倍频的方法获得短波长激光器。 |
| 10. | Along with millimeter wave technology development , the high speed modulate 155mb / s millimeter wave receiver requires that the local oscilloscope performance should be excellent to satisfy its communication requirement . this article aimed at the requirement of 8mm millimeter wave receiver and developed a high performance millimeter yto frequency synthesizer . the article introduces several millimeter wave frequency synthesizers and analyzes their characteristic
随着毫米波技术的发展，在毫米波段高调制速率的毫米波通信机对毫米波本振源提出了更高的性能要求，本文针对8mm高速宽带155mb / s无线接入通信系统对毫米波本振源的要求，介绍了几种毫米波频综的设计方案，并进行了分析，最后决定采用锁相倍频的方案。 |
