The laser beam modulation frequency has been increased to achieve better accuracy. The circuit has been designed in a simple manner to reduce unexpected error and debugging complexity.
采用同相放大电路成功实现了对微弱调制光电信号的接收，并采取简单但行之有效的方法滤除了偏置电压引入的噪声干扰；
And for the frame beam end bending moment amplitude modulation factor seems embodiment its value in practice projects.
框架梁端的弯矩调幅系数的合理取值的价值在实际工程中似乎更能体现出来。
Selection of active outdoor infrared detectors, active infrared transmitter sent a bouquet of the infrared beam by the modulation, into the infrared receiver to form a cordon.
室外选用主动式红外探测器，主动红外发射器发出一束经调制的红外光束，投向红外接收器，形成一条警戒线。
A flat-topped beam can be achieved by a suitable choice of the transform order for the Cosine-Gaussian beams with the modulation parameter.
对给定调制参数的余弦-高斯光束，通过适当选取分数傅里叶变化阶数可以获得平顶的光强分布。
And the techniques of double-slit filter and "cross-filter" can be used to extract the near field wavefront of the laser beam with phase modulation and amplitude fluctuation.
而且，利用双狭缝滤波和“交叉滤波”技术能够提取出具有位相调制或者是具有振幅起伏的近场波面。
Based on the diffraction integral theory, the quasi-focused characteristics of a laser beam with waviness modulation have been studied theoretically and numerically in the paper.
采用光波的衍射积分理论，对具有波纹调制激光束的准聚焦特性进行了理论分析。
Dynamic modulation of laser and laser bean, and offset to target reflection coefficient: laser bean is shaped and collimated to round and slender beam by using of the semiconductor laser.
激光器件及激光束的动态调制，目标反射系数补偿：采用半导体激光器，经过整形、准直成圆细光束。
This phenomenon can be explained by the spatial self-phase modulation of the Gaussian beam passing through the nonlinear medium.
该现象可以用高斯光束通过介质时产生的空间自相位调制解释。
Nowadays, the mainstream of far field beam smoothing technology adopted by foreign high power laser drivers is smoothing by spectral dispersion (SSD) based upon sinusoidal frequency modulation.
目前，国外高功率激光驱动器实现远场分布平滑化的主流技术是基于正弦调频脉冲的光谱色散平滑技术(SSD)。
Based on the phase modulation of binary optics, the binary phase only masks are used to couple the elliptical Gaussian beam to single mode fiber.
采用二元光学位相调制的基本思想，用二元纯位相型光学系统将椭圆高斯型激光束与单模光纤最佳耦合。
The influence of the size and the modulation amplitude of the defects on the intensity distribution and angular spectrum of the beam is also studied.
详细研究了振幅调制型“缺陷”的尺寸大小及调制幅度对受调制光束的光强分布和角谱影响。
Due to the excellent modulation characteristics of laser diode (LD), the infused current of the LD is modulated to make the intensity of the laser beam change with the modulation signal.
本文利用半导体激光器良好的调制特性，对其注入电流进行调制，使激光器输出光强随调制信号变化。
The deeper of the modulation depth of defects that modulated the beam, the higher of the intensity produced along the propagation process.
结果表明，不同调制尺寸、调制深度对高斯光束在传输过程中的影响相似。
This sensor featuring plane-convex lens collimator for expanding beam and coupling, and a low frequency for light pulse modulation is introduced.
利用平-凸透镜准直器作扩束耦合光学系统，采用低频斩光器实现光调制。
The process of a small diameter ultra-high power pump beam propagating in BK7 glass with or without small scale modulation was simulated.
数值模拟了小口径强泵浦光束在BK7玻璃中的传输过程并进行了实验验证。
The phase difference between the signals from beam forming net can affect the modulation index of single channel signal and can lower the precision of tracking.
和差网络输出的和差信号相位差会影响单通道信号的调制度，进而降低跟踪精度。
The paper proposed using a liquid crystal spatial light modulation (LC-SLM) controlling the laser beam to get a pseudo-thermal light source.
提出一种采用液晶光阀（LC-SLM）对激光束进行控制来获得赝热光场的方法。
The moment modulation of prestressed concrete frame has some differences compared with that of continuous beam.
关于预应力结构的内力重分布研究很多是关于连续梁结构的，对预应力框架的研究相对较少。
While the modulation characteristics disappear as the outer circular aperture is bigger than 1.5 times of the beam waist size, the results offer reasonable aperture parameter for diffraction.
当外孔大于1.5倍束腰时，衍射后轴上光强调制被有效压抑，这为选择光阑提供了合理参数。
While the modulation characteristics disappear as the outer circular aperture is bigger than 1.5 times of the beam waist size, the results offer reasonable aperture parameter for diffraction.
当外孔大于1.5倍束腰时，衍射后轴上光强调制被有效压抑，这为选择光阑提供了合理参数。
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