查询词典 Bragg

The principle of the two dimensional acoustooptic Q switch is presented,the formulas of the diffraction efficiency and diffraction loss of the AO Q switch with normal Bragg diffraction is derived,the relationship between One dimensional and Two dimensional Bragg diffraction is analyzed.

描述了两维声光Q开关的基本原理，详细推导出正常布喇格衍射的两维声光Q开关衍射效率和衍射损耗的表达式，分析了两维布喇格衍射和一维布喇格衍射之间的关系，并给出了在驱动功率40W、光束直径5mm、光波长1。

The variations of the performance of the fiber Bragg grating Fabry-Perot etalon with the length of the cavity and the reflection coefficient of fiber Bragg grating have been discussed, according to the theory of fiber Bragg grating Fabry-Perot etalon.

并利用光纤光栅法布里-珀罗标准具理论，分析了光纤光栅标准具随腔长变化的性质、光纤光栅标准具随光栅反射率变化的性质。

Photo-induced reaction processes and factor of Bragg mismatch in the photopolymer for holographic storage are studied. On the basic of analysis of the theory, the relationship of Bragg mismatch and exposure time is deuced.

对光致聚合全息存储材料光化学反应过程和引起布拉格偏移的因素进行了分析；通过理论推导，得到了曝光时间与布拉格偏移量的关系。

Photo-induced reaction processes and factor of Bragg mismatch in the photopolymer for holographic storage were studied.On the basic of analysis of the theory,the relationship of Bragg mismatch and exposure time was deuced.

对光致聚合全息存储材料光化学反应过程和引起布喇格偏移的因素进行了分析，通过理论推导，得到了曝光时间与布喇格偏移量的关系。

To provide optical fiber: Fiber Distributed Temperature Stress Test System, Fiber Distributed Temperature Measurement System, Fiber Bragg Grating Health Monitoring System, fiber optic geophone systems, fiber Bragg grating wavelength calibration instrument and so on, which sensor product line is extremely rich and has industry representation, including: fiber optic temperature hygrometer, fiber-optic gas alarm, fiber-optic magnetic field sensors, optical fiber vibration sensor, fiber-optic high temperature pressure sensors, fiber-optic WIM system , fiber optic strain gauge welding, fiber optic embedded strain gauge, optical soil pressure gauge, fiber reinforcement meter, fiber optic pressure ring, fiber-optic displacement meter, fiber cracks meter, fiber optic osmometer, fiber-optic temperature sensor high temperature , optical fiber cable meter and so on.

北京达卡科技有限公司光纤方面提供：光纤分布式应力温度测试系统、光纤分布式温度测试系统、光纤光栅健康监测系统、光纤地震检波系统、光纤光栅波长校验仪等，其中传感器产品线极为丰富和具有行业代表性，包括：光纤温湿度计、光纤瓦斯报警器、光纤磁场传感器、光纤振动传感器、光纤耐高温高压传感器、光纤动态称重系统、光纤焊接式应变计、光纤埋入式应变计、光纤土压力计、光纤钢筋计、光纤压力环、光纤位移计、光纤裂缝计、光纤渗压计、光纤耐高温温度传感器、光纤钢索计等。

Finally, We analyze and experimentally demonstrate that both the bandwidth of the fiber Bragg grating's short wavelength loss and the bandwidth of fiber Bragg grating's reflection increase with the increase of strain gradient along the length of grating.

最后，我们对光纤光栅的反射和短波损耗的应变特性作了理论分析和实验测试，发现在光纤光栅的反射带宽随光栅轴向应变梯度的增加而增加的同时，光栅短波损耗带宽也随光栅轴向应变梯度的增加而增加。

In this few decades, scholars paid attention to the research of Bragg reflection in regular waves. Thus, this study aimed to discuss the Bragg reflection in irregular waves. EEMSE is a numerical model based on evolution equation for mild-slope equation developed by Hsu et al.

以往关於系列潜堤之布拉格反射研究，在规则波方面的理论、数值研究与分析都渐趋成熟，而实际应用於海岸保护时需考虑波浪为不规则波，因此本文之重点在於探讨不规则波下之布拉格反射。

The strain gradient, the fiber Bragg grating's reflection and the short wavelength loss decide the two stopbands. Because of having no extra loss result from coupler and no high cost result from circuitor, the band pass filter formed by single chirped fiber grating have many good characters such as little insert loss its insert loss is the fiber splice loss, small volume, low cost and excellent property, moreover there is no report about fabricating filter by using this method, thus we will apply national invent paten about the method of fabrication fiber band pass filter using single chirped fiber grating. According to the parameters linearly chirped fiber gratings of Canada BRAGG Photonics Inc.

由于没有耦合器带来的3dB的额外损耗，也没有环行器带来的高的制作成本，用单支chirped光纤光栅形成可调光纤带通滤波器具有插入损耗极小（插入损耗为光纤与光纤之间的融接损耗）、体积小、制作成本低廉并且性能优良等特点，而且国内外还未见类似制作方法的报道，我们对用单支chirped光纤光栅形成可调光纤带通滤波器这一制作方法正在申请国家发明专利。

Two FBGs are attached radially and circumferentially to a metal diaphragm respectively, and when temperature and pressure change, the peak wavelength of the FBGs will shift.

分别將光纤Bragg光柵沿膜片的径向和环向粘贴在膜片上，当温度发生变化或者膜片受到压力作用时，都会引起光纤Bragg光柵峰值波长偏移。

The Army conducted a series of L.S.D. tests at Fort Bragg in North Carolina.

军队在北卡罗来纳的Fort Bragg进行了一系列的L.S.D实验。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。