| 1. | And the theory of qpm was explained on the base of coupling wave equation
并从耦合波方程出发,说明了准相位匹配技术的原理。 |
| 2. | Look back the history of laser frequency conversion and present the present situation and the trend of quasi - phasematched ( qpm ) . 2
1 、回顾了激光变频的历史，着重介绍了准相位匹配及其材料的研究现状及发展方向。 |
| 3. | At present , we have achieved frequency conversion in pulse - wave and continue - wave as well as quasi - continue - wave by using quasi - phase - matched method
目前，利用准相位匹配技术已实现了脉冲、准连续和连续光的频率转换。 |
| 4. | Utilizing quasi - phasematched ( qpm ) technique to achieve a given useful laser frequency conversion is a practical and challenging topic
利用准相位匹配( qpm )技术在光学超晶格中实现特定的可实用化的激光频率变换，在目前是一个富有实际意义和挑战性的课题。 |
| 5. | In this paper , various frequency conversion by qpm technique will be studied in theoretically and experimentally and the fabrication methods of osls will be presented : 1
本文从理论和实验上研究了利用准相位匹配技术的各种变频效应及光学超晶格的制备方法。 |
| 6. | In this thesis , the main contents are following : 1 . reviewing the theory of nonlinear frequency conversion . quasi - phase - matching is discused . presenting the method for configuring periodically poled as well as multiple period superlattice
阐述了非线性频率变换的原理，讨论了相位匹配和准相位匹配技术，着重说明了周期和准周期光学超晶格的工作原理。 |
| 7. | And then the theoretic technique of import the periodically wave of periodically poled crystals in the process of opo was studied , the theoretical method was realized by using period poled crystal in quasi - phase - matched optical parametric oscillation
研究了将周期极化晶体的周期波矢引入光学参量振荡过程,利用周期极化晶体实现准相位匹配光学参量振荡的理论方法。 |
| 8. | On account of qpm can take advantage of the largest element of x tensor , and any interaction with transparency range of the material can be noncritically phase matched without walk - off angle . therefore , the conversion efficiency in longer crystal may be improved
由于准相位匹配可利用非线性光学晶体最大的二阶极化张量元，在晶体的整个通光范围内均可实现非临界相位匹配，在较长的晶体上可望实现较高的变频效率。 |
| 9. | Due to qpm takes on many virtues , and its material is easy to fabricate , qpm technique have been becoming the focus of the frequency conversion . along with the development of qpm theory and the perfection of fabrication method , qpm will show quite exciting application foreground . at home , the national laboratory7 of solid microstructures
准相位匹配技术由于具有上述诸多优点，其材料便于人工制备已逐渐成为非线性变频领域的一个热点，随着人们对准相位匹配理论研究的深入和光学超晶格制备技术的完善，准相位匹配技术将显示十分诱人的应用前景。 |
| 10. | So qpm enlarge the application range of the crystal in existence . presently diode pumped all - solid - state lasers have been developing quickly , which provides an ideal pump source for qpm . so lower power all - solid - state laser frequency conversion by qpm has been becoming a research focus
近年来，随着激光二极管( ld )技术的发展，小功率全固态激光器已经十分成熟，为准相位匹配提供了优质的泵源，因此，小功率全固态激光器的准相位匹配频率变换成为目前的一个研究热点。 |
