The meanings of resolution and scale are similar , but scale is usually comprehended as multiple of scale down , and resolution as behaving power of detail or precision 摘要比例尺与分辨率是两个相似的概念，但比例尺通常被理解为缩小倍数，而分辨率则通常被理解为细节表现力或精细度。
We also propose a new subsidiary method for finesse measurement based on selfhomodyne by x m . using of resonating of the intra - cavity amplified spontaneous emission ( ase ) light , without extemal light source 同时提出利用腔内ase输出光的线宽来测量有源光纤环形腔滤波器的精细度，而不需要注入光。
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。
This research proposes to rearrange bit rates from eye - sensitive regions which is the motion of the video to eye - insensitive regions which is the static regions of the video , so that eye - sensitive regions would have higher fidelity so as to obtain a better visual condition on the whole video in low bit rate situations 这个研究提出一个从画面中人眼较不敏感的区域(静态区域)分配位元给画面中人眼较敏感的区域(动态区域) ，使得在低位元率的情况下，人眼较敏感的区域能有较高的精细度，如此来改善整个视讯画面的视觉效果。
With the development of laser techniques , the optical cavity has played an important role on monitoring laser mode , measurement and narrowing of laser linewidth , laser mode cleaner , laser frequency stabilization , optical spectrum and cavity - qed etc . , due to its advantages of ultra - low losses , high finesse and narrow linewidth 随着激光技术的发展，谐振腔由于其腔内损耗小、精细度高、线宽窄等特点，使得其在监视激光模式、测量并压窄激光线宽、激光模式清洁、激光稳频、激光光谱学、腔量子电动力学等方面起到重要的作用。
Based on the structure of all optical active fiber ring resonator , dual - tunable er3 + - doped optical fiber ring resonator filter is investigated by adding a tunable bandpass filter to change its wavelength . its finesse can also be tunable by adjusting the pump power . the wavelength tuning range of the dual - tunable fiber ring resonator filter is 39nm , from l526nm to l565nm 在基于掺铒光纤环形腔结构基础之上，通过在腔中加入的可调谐介质薄膜滤波器来选择滤波波长，并通过调节泵浦功率来改变腔精细度，以实现一种滤波波长以及精细度双可调谐的光纤环形腔结构窄带滤波器。
The main parts of this thesis are as following : part 1 : it is briefly introduced the history and types of the f - p cavities , including the basic principle and parameters of the f - p cavity . moreover , the analysis is showed about the relations between the cavity finesse , ringdown time , quality factor and the losses 本文的主要内容有如下几部分：第一部分：介绍了腔的历史背景及其类型，以及一般f - p腔的原理和基本参数，分析了腔的精细度、光子寿命(衰荡时间) 、品质因数等与腔损耗间的关系。
Part 2 : the background and principle of measuring the losses in the high - finesse cavity with the technique of ringdown are showed and the high - finesse cavity composed of super mirrors , with cavity length of 17 . 8mm is set up . by cavity - ringdown experiment , we can get the finesse about 2 105 and total losses of the high - finesse cavity about 30ppm 实验上建起一套由“超镜”构成腔长为17 . 8mm的高精细度腔，并测得光在腔内的衰荡信号，推算出腔的精细度约为20万和损耗约为30ppm 。
In this thesis , it is mostly showed about the setup and the losses measurement of high - finesse optical cavity , including its application to measuring the linewidth of semiconductor laser . for the example , it is used to measure the linewidth of dbr laser and research the rules of linewidth influence of injected noise on the semiconductor laser 本文主要介绍了高精细度腔的建立及其低损耗的测量，还介绍了其在半导体激光器线宽测量方面的应用，例如测量dbr激光器线宽和研究噪声对半导体激光器线宽的影响规律。
