线宽

In this paper, we got the regularity of cavity ring-down spectroscopy when the line width of laser pulse is far larger than the absorption line width of measured substance.

本文研究了当激光脉冲线宽远大于被测吸收物质的吸收线宽时，衰荡光谱满足的规律，以及在这种情况下，测量灵敏度的大小。

The energy distribution of the focused laser spot has Gaussian profile, and if the exposure dose threshold of the photoresist is less than and far away from the peak of that Gaussian curve, the linewidth will be less affected by the variation of exposure dose or exposure dose threshold, and so, will improve the linewidth stability.

准直光束经物镜会聚后光斑的能量呈近似高斯分布，当胶层的曝光量阈值远离高斯型曝光量曲线的头部时，可以弱化线宽对实际曝光量或胶层曝光量阈值等变化的敏感度，从而提高线宽的稳定度。

It was showed that linewidth of SBS fluctuated random and of STS changed regularly as pump power increased.

结果显示：随着泵浦能量的增加，SBS的线宽随机起伏，而STS的线宽有规律地变化。

Studying mode structure of fiber laser by spherical surface scanning interferometer, in theory deducing the method of measuring width by spherical surface scanning interferometer, proposing two kind of narrow width fiber lasers.

5利用球面腔扫描干涉仪研究了光纤激光器的模式结构，从理论上对球面腔扫描干涉仪测线宽进行了分析研究，提出了两种窄线宽光纤激光器。

Some ways of measuring laser linewidth have been analyzed and compared. Considering the present condition of the lab, homodyne method is chose to measure narrow linewidth lasers.

结合实验室现有的实验条件，采用光纤延时零拍测量法测量窄线宽激光，并利用该方法对单纵模光纤激光器的输出线宽进行了测量。

The research which is the important part of the tunable erbium-doped fiber laser is composed of two main parts: 1. the gain part of the tunable erbium-doped fiber laser, which in fact is an erbium-doped fiber amplifier, its output characteristics are discussed both in theory and experiment, and the differences are also discussed between theory and experiment; 2. the saturated absorber part of the tunable erbium-doped fiber laser, also the part to narrow the line width of the fiber laser. The line-width narrowing mechanism in fiber laser induced by unpumped Er-doped fiber is presented from the aspect of coupling wave equation, and the main factor is considered as the standing wave induced by interference. The line-width is narrower when the standing wave is stronger, and the narrowing effect disappears with the disappearance of the standing wave. In the experiment, when adding a Faraday mirror in the laser cavity to remove the standing wave , the narrowing effect disappears. So the theory is proved by the result of the experiment.

本课题的研究内容是集成光学声光可调谐掺铒光纤激光器的重要组成部分，主要分两部分：1、声光可调谐掺铒光纤激光器中增益部分的研究，相当于对掺铒光纤放大器的研究，理论上对掺铒光纤放大器的输出特性进行分析，实验上实现了掺铒光纤放大器系统，并将实验数据与理论计算数据进行对比，分析了误差产生原因；2、声光可调谐掺铒光纤激光器中饱和吸收体部分的研究，即压窄光纤激光器输出线宽的研究，从耦合波方程出发，理论上解释了未泵浦掺铒光纤压窄光纤激光器线宽的原理，分析了影响该作用的主要因素是未泵浦掺铒光纤中相对传输的光干涉形成的驻波：驻波越强，压窄效果越好，相反当没有驻波时，没有压窄效果，在实验上通过在激光器腔内加入法拉第旋转镜使驻波消失，同时压窄效果消失，从而验证了理论分析的正确性。

The average linewidth enhancement is the latent physical attribute of SOA that is the groundwork to investigate the OSP based on cross phase modulation of SOA.

平均线宽增强因子是SOA的本征物理属性，它不随输入信号的改变而改变，而器件有效线宽增强因子则是系统相关的，它决定了脉冲的相位变化和增益变化的关联度，是研究基于SOA相位调制效应的光信号处理问题的基础。

The linewidth of laser is less than 10 kHz, measured by the delayed self-heterodyne method with 10 km monomode fiber. SNR is about 56 dB.

采用10km单模光纤延迟线进行了延迟自外差线宽测量，得到光纤激光器的3dB线宽小于10kHz。

73MW output power is obtained. The slope efficiency is 55%. The 3dB linewidth of laser is less than 10 kHz, measured by the delayed self-heterodyne method with 10km monomode fiber.

采用10km单模光纤延迟线进行了延迟自外差线宽测量，得到光纤激光器的3dB线宽小于10kHz。

The 3dB linewidth of presented fiber laser was about 4.0kHz, measured by the delayed self-heterodyne method with 30km single mode fiber.

采用延时自外差方法测量线宽，当使用30km单模光纤延迟线时，测量得到激光器的3dB线宽为4.0kHz。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。