查询词典 modulation

A theoretical model of wavelength conversion based on cross gain modulation in semiconductor optical amplifier is derived. Characteristics of extinction ratio of converted signal under both co- and counter-propagating scheme are discussed in details.

建立了基于半导体光放大器-交叉增益调制的波长转换理论模型，利用分段方法对交叉增益调制波长转换器同向和相向两种工作方式下消光比特性作了详细的研究。

Using the Lagrange varitional method and considering the cross phase modulation as perturbation factor, the characteristic of DMS are synthetically analyzed and studied in wavelength division multiplexing and optical time division multiplexing systems for the first time.

运用拉格朗日变分法视XPM为扰动因子，首次综合解析了WDM和OTDM系统中DMS特性，并利用解析结果对不同的系统进行研究。

Novel All-Optical AND Gate Based on Cross Gain Modulation in Cascaded Semiconductor Optical Amplifiers. Chinese Journal of Lasers, 2004, 31(12): 1433～1436 in chinese

作者简介王颖(1979―)，女，华中科技大学光电子工程系硕士研究生，主要从事半导体光放大器在全光逻辑方面的研究。

A novel ultrafast SOA model is presented and the numerical arithmetic is provided.Secondly, an analytical formula for wavelength conversion of transient cross phase modulation is deduced from the viewpoint of impulse response function.

概括全文的研究成果和贡献，有如下几个方面：(1)研究了SOA实现全光信号处理的基本原理，推导了SOA中最基本的光场传输方程和载流子速率方程，分析各种非线性效应的原理及其应用。

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。

When several ultrafast pulses are propagating simultaneously, nonlinear processes such as cross-phase modulation, cross non-degenerate TPA, SRS and four-wave mixing, and so on, will be considered. One of the nonlinear processes will play dominance for various conditions.

当多波长超快脉冲在波导中传输时，脉冲之间将发生交叉相位调制、交叉非简并双光子吸收、受激拉曼散射和四波混频等非线性过程，在不同的条件下，将具有不同的非线性过程起主导作用。

Also we may design the valve group for the distributor of the motor,like with balancing valve,high-pressured shuttle valve,velocity modulation cross valve or other performance valve groups.

摘要本设计是通过对液压绞车工作原理、工作的环境和工作的特点进行分析，并结合实际，在进行细致观察后，对液压绞车的整体结构进行了设计，对组成的各元件进行了选型、计算和校核。

Simultaneous inverted and non-inverted wavelength conversion based on cross polarization modulation in semiconductor optical amplifier.

基于半导体光放大器交叉偏振调制效应实现正、反相波长变换。

S. pump wavelength and pump power were discussed.Secondly, the spectrum broadening due to the cross phase modulation in DSF was analyzed, and the principle and experimental setup of actively mode-locked Erbium-doped fiber laser was introduced.

第四章对交叉相位调制效应导致频谱展宽的原理进行了分析，介绍了主动锁模掺饵光纤激光器产生锁模脉冲的原理及实验，对基色散位移光纤交叉相位调制的波长转换进行了实验研究。

The modulation of cross section is obviously,the intensity of it is smaller as the circular aperture is bigger and the intensity is bigger as the circular aperture is smaller.

平顶高斯光束经过圆孔衍射，孔径大时光强在横截面调制越厉害，但是强度小；孔径小时光强在横截面调制相对小，但是光强度相对大。

Researches reveal that students who suffer from corporal punishment tend to resort to violence in their future life.

研究表明遭受过肉体惩罚的孩子倾向于在他们今后的人生中使用暴力。

Total sugar of sarcocarp and chlorophyll of pericarp increased firstly, and then decreased afterward along with altitude; Titratable acidity, ascorbicacid and anthocyanin of pericarp were increased along with altitude; The content of protein increased firstly and decreased afterward along with altitude; Carotenoid of pericarp were decreased along with altitude.

果肉总糖和果皮叶绿素含量随海拔高度升高先升高后降低；可滴定酸、维生素C和果皮花青苷含量均随海拔升高而升高；蛋白质在1720m处最大，1420m处最小；果皮类胡萝卜素随海拔升高而降低。