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1)  long period fiber gratings filters
长周期光纤光栅滤波器
2)  long period fiber grating
长周期光纤光栅
1.
Novel geophone based on long period fiber grating;
基于长周期光纤光栅的新型地震检波器
2.
NO gas sensitive effect of long period fiber grating coated with sensitive film;
镀有敏感膜的长周期光纤光栅NO气体传感特性
3.
Numerical calculation for the transmission spectrum of a novel long period fiber grating;
一种新型长周期光纤光栅透射谱的数值计算
3)  LPFG
长周期光纤光栅
1.
Transmission spectrum characteristics of long-period fibre grating(LPFG) were theoretically analysed by using coupled-mode theory.
利用模式耦合理论对长周期光纤光栅的传输光谱特性进行了理论分析。
2.
In order to reduce the effects of the ambient temperature variations on the resonant wavelength of the Long-Period Fiber Grating(LPFG) devices in communications,a scheme for the compensation of its drift is designed,i.
为减小环境温度变化对通信中长周期光纤光栅(LPFG)器件谐振波长的影响,文章设计了一种补偿谐振波长漂移的方案,即在光栅表面涂覆一层随温度升高折射率变大的薄膜。
3.
The spectrum through long-period fibre grating (LPFG) is analysed by coupled-modal theory,the formulas of transmission and resonant wavelength etc are deduced.
基于耦合模理论对长周期光纤光栅的光谱特性进行了理论分析,推导出传输率、谐振波长等公式;利用精密步进电机和高频CO2激光器,设计采用高频CO2激光脉冲三束对称逐点写入技术,在普通通信单模光纤中成功地进行了长周期光纤光栅的制备研究。
4)  long-period fiber grating
长周期光纤光栅
1.
Establishment and solution of the characteristic equation of metal-coated quadruple clad long-period fiber grating;
镀金属四包层长周期光纤光栅特征方程的建立与求解
2.
The relation between resonant wavelengths and film optical parameters of triple-clad long-period fiber grating;
三包层长周期光纤光栅谐振波长与薄膜光学参数的关系
3.
An analysis of the core mode coupling to the cladding mode in long-period fiber grating;
长周期光纤光栅中纤芯导模与包层模耦合分析
5)  long-period fiber gratings
长周期光纤光栅
1.
Novel long-period fiber gratings written by high-frequency CO_2 laser pulses and their applications in optical fiber communication;
高频CO_2激光脉冲写入的新型长周期光纤光栅及其在光通信中的应用
2.
Two kinds of special long-period fiber gratings,phase-shift and apodised long-period gratings,were studied by many researchers,because of their special spectral characteristics.
相移长周期光栅和变迹长周期光栅作为两种特殊的长周期光纤光栅,由于其特殊的光谱特性,受到了人们的关注。
3.
Firstly we studied the sensitivity of long-period fiber gratings (LPFGs) to the re- fractive index of ambient medium using the coupled modes theory.
首先利用耦合模理论研究了长周期光纤光栅LPFG折射率敏感特性,数值计算了长周期光纤光栅透射谱谐振波长与环境介质折射率的关系。
6)  long period fiber grating(LPFG)
长周期光纤光栅
1.
The sensitivity of long period fiber grating(LPFG) has been increased through three measures: using the LPFG whose core strain coefficient is larger than that of the cladding;coating a thin layer of film on the cladding,which the refractive index would decrease with increase of temperature;packaging the LPFG with metal that has larger linear expansion factor.
采用纤芯弹光系数大于包层弹光系数的长周期光纤光栅,且在其包层外面涂覆一层随温度升高折射率减小的薄膜材料,同时采用线膨胀系数较大的金属封装光栅等三种增敏措施,可提高长周期光纤光栅温度传感器的灵敏度,测得其灵敏度系数为0。
2.
The progress in fabrication method of long period fiber grating(LPFG)is introduced.
介绍了长周期光纤光栅制作技术上的进展。
3.
A long period fiber grating(LPFG) is a wavelength seletive filter developed in recent years.
长周期光纤光栅是近几年出现的一种波长选择滤波器件。
补充资料:长度计量技术:光栅测长技术
         利用光栅產生的莫尔条纹测量位移和轮廓形状等的长度计量技术。测量位移时﹐将计量光栅副中的光栅尺和指示光栅分别固定在长度测量工具或机床等的移动件(例如滑架)和不动件(例如机床导轨)上。两者相隔一个很小的间隙(一般为 0.05~0.1毫米)。当滑架移动时﹐出现在光栅副上的莫尔条纹的週期性光强变化﹐通过光电转换元件转换为正弦波形电信号﹐经放大﹑整形﹑细分﹑计数和显示等电子部分后即可得出光栅位移量。由光源﹑计量光栅副和光电转换元件等组成的部件称为光栅式长度传感器。由光栅式长度传感器和放大﹑整形﹑细分﹑计数和显示等电子部分组成的系统称为光栅测量系统(见图 光栅测量系统 )﹐常用具有相位依次差1/4线距的四组线条的光栅作为指示光栅。当以圆光栅副代替长光栅副时﹐类似的测量系统可用於测量角位移。长﹑圆光栅测量系统的精确度分别可达 1微米/1000毫米和0.5/360°以上。随著光栅製造技术和电子技术的发展﹐从20世纪50年代开始应用光栅测长技术来测量位移。这种方法已用於三坐标测量机﹑数字显示工具显微镜﹑渐开线测量仪﹑齿轮单面嚙合检查仪和电子千分尺等的测量系统中﹐也常用於数字控制机床的定位反馈系统和其他机床的定位系统中。70年代又开始利用莫尔轮廓图测量表面轮廓形状和变形等。
   
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