In the yb3 + - doped single or double clad fiber lasers by using few - mode fiber bragg gratings as wavelength reflectors , the linewidth of the output laser is smaller than 0 . 1nm , which shows that such a scheme can produce narrow linewidth laser 最吸引我们的是使用这种光纤光栅做为腔镜组成的掺yb3 +单包层和双包层光纤激光器有着小于0 . 1nm的3db带宽,说明少量模光纤布拉格光栅具有较窄的反射峰。
Some factors related to the trap potential and heating rate are considered , such as the laser detuning , the changing of cavity length , laser power of trapping beam , and the linewidth of laser . 7 ) an ultra - high finesse micro - cavity is established in our lab 6 )对超高精细度微腔内光学偶极阱进行了数值模拟,研究了光场失谐、腔长变化、功率、以及线宽等参数对腔内偶极阱的阱深以及加热率的影响。
Just below threshold , consistel1t to theoretical analysis , there are numbers of comb - like narrow linewidth lights due to resonating of ifltr8 - cavity ase light . novel experimental results of the erbium - doped - fiber ring resonator behaviors operating near threshold are reported in the chapter 首先理论分析了当有源环形腔无注入光,且有源光纤环形腔在阈值以下时,由有源腔内ase输出光表现出的腔输出特性。
Then , on the basis of coupled wave equations , theoretically studies of opo threshold parameters and of the conversion efficiency and of linewidth control are presented . several principles of the optimum design for opo are discussed . the experimental investigations of noncritical phase matching 以耦合波方程为基础,分析和计算了光学参量振荡器的转换效率、抽运阈值、谱线宽度等特性,并在此基础上讨论了如何选择opo的各项参数。
Several key techniques that only exist in polar coordinate have been used in ldw processing . an efficient experiential formulation that indicates the relation between linewidth and laser power corresponding to various radial positions under constant angular velocity is presented based on the definition of exposure 本文在极坐标激光直写光刻技术研究中,解决了极坐标特有的关键技术,制作了同心环分划板,定位精度和线宽达到了设计要求。
Opc is considered to be useful in two ways : first it enables smaller features with closer proximities to be printed on the same area ; second , it increases the process latitude , decreases the variations of linewidth across a chip and could potentially enhance yield Opc是非常有用的,一方面使用opc ,能在相同的面积上加工出更小的特征线宽;另一方面,使用opc提高了工艺窗口,降低了整个芯片特征尺寸的变化,潜在地提高了集成电路的生产成品率。
Next we consider the effect of the coupling field linewidth to electromagnetically induced absorption , by employing a four - level system in which three transitions are in n configuration and the middle transition serves as a probe transition , we find that coupling field linewidth inhibits electromagnetically induced absorption 硕士学位论文master ’ st } iesis其次,本文研究在裸态下,考虑祸合场线宽对原子相干的作用,进一步揭示了祸合场线宽抑制电磁诱导吸收。这与祸合场线宽增强eit的吸收形成鲜明的对比。
In this paper we have done two work , one is we , in the dressed states representation , reveal that the constructive interference of atomic coherence on absorption leads to electromagnetically induced absorption , which is in sharp contrast to the case in which destructive interference of atomic coherence gives rise to electromagnetically induced transparency and the other is we reveal that coupling field linewidth inhibits electromagnetically induced absorption , by employing a four - level system in which three transitions are in n configuration and the middle transition serves as a probe transition 本文主要做了两方面的工作:一是在修饰态表象中揭示修饰态原子相干对吸收的相长干涉产生电磁诱导吸收,这与修饰态原子相干对吸收的相消干涉导致电磁诱导透明的情形形成鲜明的对照。二是在裸态中,引入耦合场的线宽,从而发现耦合场的线宽抑制电磁诱导吸收。首先研究电磁诱导吸收。
In the sectionl , we introduced the development of opo and the correlative nonlinear optical ( nlo ) crystal , summarized the background and the recent advance of the clbo and linewidth of opo ; in the section2 , we have studied and stimulated linewidth of parametric light of clbo optical parametric oscillators pumped by 355nm by computer 第一章介绍了光参量激光器及相关非线性晶体的发展状况,综述了clbo晶体和opo线宽的研究背景及其研究进展情况;第二章以355nm作为泵浦光,对影响clbo晶体光参量振荡器线宽的各种物理机制进行了数值模拟计算、分析。
However , as optical parametric oscillators are mainly used in the research area of spectroscopy etc , and the applications of spectroscopy have a high demand for the resolution of the lasers , namely beam linewidth , ours practical study of bbo - opo mainly take the efforts for seeking the theoretical support of the decreasing linewidth and improving the beam quality of output , and practical experimental methods as well as increasing the conversation of the parametric beams , and providing convenient tuning systems for the opo applications 然而,由于opo主要应用于光谱学研究等领域,而光谱学的应用对激光的分辨率即线宽和光束质量要求较高,因此本文的bbo - opo实用化研究在努力提高参量光的转换效率的同时,主要致力于寻求压缩线宽和提高光束质量的理论依据和实用化的实验手段以及为opo的应用提供便捷的调谐系统。