1) mechanically-induced long-period fiber grating
应力长周期光纤光栅
1.
By investigating the spectrum of the mechanically-induced long-period fiber grating with fiber jacket,we have discovered the force sensitivity of the mechanically induced long-period fiber grating with fiber jacket increases obviously than that of the mechanically induced long-period fiber grating without fiber jacket.
就涂覆层对应力长周期光纤光栅谱特性影响进行了研究,发现去涂覆层的应力长周期光纤光栅的谱特性对应力的灵敏度比未去涂覆层的明显的高,且大大改善了其传输谱的特性。
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：疲劳应力周期比
分子式：
CAS号：
性质：设试样在振幅为S1的循环应力作用下，其疲劳寿命为N2…若循环应力S1作用于试样的循环次数为n1（n1<N1）；循环应力S2作用于试样的循环次数n2（n2<N2）…则当有时，试样发生疲劳破裂。即称为疲劳应力周期比。它表示振幅为S的循环n次后，使试样疲劳寿命降低的比率。常用这个方法来估计材料在非恒定振幅的循环应力作用下的疲劳寿命。不过误差是较大的。
CAS号：
性质：设试样在振幅为S1的循环应力作用下，其疲劳寿命为N2…若循环应力S1作用于试样的循环次数为n1（n1<N1）；循环应力S2作用于试样的循环次数n2（n2<N2）…则当有时，试样发生疲劳破裂。即称为疲劳应力周期比。它表示振幅为S的循环n次后，使试样疲劳寿命降低的比率。常用这个方法来估计材料在非恒定振幅的循环应力作用下的疲劳寿命。不过误差是较大的。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条