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Fiber Bragg grating characteristics by applying a transverse force to a middle section were studied theoretically and experimentally.

对均匀光纤布拉格光栅中间一段横向受力特性在仿真的基础上作了理论和实验研究。

A low-loss rectangular-passband multiplexer including a three-arm interferometer coherently connected to a waveguide grating router, resulting in a passband substantially of type N=3, without intrinsic loss.

本发明提供了一种低损耗的矩形通带复用器，包括相干连接到波导光栅路由的三臂干涉仪，形成大致为N＝3类型的通带，而没有本征损耗。

More than ten years ago,"the negative day" the numerical control line cutting engine bed first applies and the actual production, starts the control bench is uses the transistor separative element assembly to become, after but uses the integrated circuit, now to is using the direction which the microcomputer controls to develop, Therefore this definition design "the electrical fire colored thread cutter automatic control" is by 8031 shrapnel machine took the control core, step-by-steps the electrical machinery achievement to actuate the electrical machinery, the diffraction grating a closed-loop control system which constitutes as the position examination part.

十多年前，&负旦型&数控线切割机床首先应用于实际生产，最早控制台是由晶体管分离元件组装而成，逐渐采用集成电路，现在正向采用微型计算机控制的方向发展，因此本论文设计的&电火花线切割机的电气控制系统&是以89C55单片机作为控制核心，步进电机作为驱动电机，光栅作为位移检测元件而构成的一个闭环控制系统。

Using the sensitive characteristic of fiber grating, the standard thread steel bar has been measured in our experiments. The data measured by FBG and resistance strain chip are compared with their theoretical values.

利用光纤光栅作为传感元件，对螺纹钢标准拉伸试验试件的拉伸应变特性进行了分析与测量，采用电阻应变片作为对比测量，并与理论值进行了比较。

To improve dispersion compensation capabilities of chirped long-period fiber grating for fiber communication, the method using thin-clad chirped LPFG is proposed.

为了提高啁啾长周期光纤光栅光纤通信的色散补偿能力，提出了利用薄包层啁啾LPFG进行色散补偿的方法。

By numerical calculation the small signal gains of five different shape grating structures are investigated, and the results indicate the triangle-groove SWS has the smallest gains and widest bandwidth and the swallow-tailed groove SWS has the biggest gain and the narrowest bandwidth among these structures.

研究表明在相同梳口和梳宽情况下，三角形梳结构的小信号增益最低，但带宽最宽，热相速最大；倒梯形梳结构的小信号增益最大，但带宽最窄，热相速最小。

Can design special specification steel grating plate according to the customer request.

6，可以设计特殊规格的钢格板，根据客户的要求。

The optical bistability is observed in the latter laser. By applying equations, the condition of forming self-written grating, reason of single mode lasering and suppressing effects on all side modesis presented.

同时利用速率方程在对饱和吸收光纤中自写入光纤光栅的形成进行了理论分析，给出了形成条件、解释了单频激光形成原因和对边模有效的抑制作用。

The self-focusing properties, design, fabrication and diffraction properties of Varied Line-Space grating were investigated in detail.

利用变栅距光栅的衍射光束自聚焦特性，设计和制作了变栅距透射光栅，并对其自聚焦特性进行了研究。

In order to improve the precision of time grating, the method of digital closed-loop control is used to obtain the V and a scheme of self-compensation is proposed to eliminate the influences of these factors such as temperature, electronic components and others that can not be easily specified.

为提高时栅的测量精度，采用数字闭环控制方法去获得恒速V，提出了一种时栅位移传感器自补偿方案，以消除温度、电子元器件等因素的影响。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了