本文应用耦合模理论分析了长周期光栅的光谱特性。
The spectral characteristics of a long period fiber grating is analyzed by using the coupled mode theory.
MEMS工艺使长周期光栅振幅掩模版的制作变得简单、灵活、且精度高。
The Amplitude mask of LPFGs will bear the advantage of easy to be made, high precision and good agility if fabricated by MEMS technique.
利用长周期光栅的边缘滤波解调技术，我们报道了一种光纤布喇格光栅位移传感方法。
An edge filter demodulation of fiber Bragg grating (FBG) displacement measuring scheme using long period grating (LPG) is reported and demonstrated.
从理论和实验上研究了长周期光栅的折射率特性和双折射效应，阐述了其实际应用价值。
The refraction index sensitivity and birefringence effect for LPG were analyzed, and their practical application were expound.
这种较高次包层模谐振将导致极宽带的长周期光栅，论文中还预计了这种长周期光栅未来的应用。
Such higher order cladding mode resonances will result in ultra-broadband LPG. The possible application of such an LPG is predicted.
针对本课题的关键：选取合适的材料作为长周期光栅的表面敏感膜，并根据反应原理确定适宜的反应条件。
The key point of this task is to choose a proper material and adopt appropriate reaction conditions accordingly.
分析结果表明，莫尔光栅技术在制作高性能的相移长周期光栅和变迹长周期光栅上有着很好的应用前景。；
The results of analysis indicate that the moiré gratings technology can be well applied in fabricating the high-performance phase-shifted and apodised long-period fibre gratings.
由于长周期光栅在较高次包层模谐振时的特殊性，在光栅制作的过程中会出现与其它包层模谐振不同的特性。
Since the characteristics of higher order cladding mode resonances are specific in LPG, it will exhibit different phenomena during the process of grating manufacturing.
采用长周期光纤光栅均衡滤波器，设计出了光纤长周期光栅（LPG）均衡光纤宽带放大器，并进行了模拟计算。
With the equalizing filter made by long period grating(LPG), we design the flat gain spectra of EDFA.
应用耦合模理论和传输矩阵法计算模拟了长周期光纤光栅的透射谱，并对其进行了切趾优化。
Based on the coupled-mode theory, the transfer-matrix method is used to calculate the transmission spectra of phase-shifted long-period fiber gratings (LPFG).
本文主要研究了聚合物长周期光纤光栅的传感特性及掺偶氮聚合物长周期光纤光栅的制作。
In this paper, we presented a research of the sensing characteristics of polymer Long period grating and its inscribing.
金属包层长周期光纤光栅可用于对谐振波长的调谐。
Metal coated long period fiber gratings (LPFG) can be used to change the resonance wavelength.
对采用高频CO2激光脉冲写入的新型长周期光纤光栅的透射谱进行了理论分析。
The transmission spectrum of a novel long period fiber grating written with the high frequency CO2 laser pulses is theoretical analyzed.
介绍了长周期光纤光栅制作技术上的进展。
The progress in fabrication method of long period fiber grating (LPFG) is introduced.
长周期光纤光栅是一种新型光纤器件。
Long period fiber grating (LPFG) is a new kind of optical fiber element.
研究了高频CO2激光脉冲写入的长周期光纤光栅在扭曲状态下的横向负载特性。
The transverse load characteristics of twisted long-period fiber grating (LPFG) written by high-frequency CO2 laser pulses was demonstrated.
对于涂覆长周期光纤光栅(LPG)传感元件，涂覆层折射率大于包层折射率时将具有很高的灵敏度。
As the refractive index of the overlay is higher than that of the cladding, the Long Period fiber Grating (LPG) element exhibits high sensitivity.
结果表明：目前比较适合用于偶氮苯聚合物长周期光纤光栅刻写的方法有偏振直写法和振幅掩模法两种。
The results show that it is suitable to write azopolymer long-period optical fiber gratings using the polarization direct writing method and amplitude mask method.
介绍长周期光纤光栅基本工作原理、器件特性和制备方法，同时对这种器件在光通信和传感系统中的应用状况作了简要概述。
The present paper introduce mainly basic principle, device characteristic and making method of long-period fiber grating and outlines the application status in optical communication and sensor system.
设计了一种基于长周期光纤光栅的电压传感系统。
A kind of fiber voltage sensing system based on long period fiber grating is designed.
对长周期光纤光栅和双锥形光纤之间的倏逝波耦合作用进行了研究。
Evanescent-field coupling based on long-period fiber grating (LPG) and bi-conical tapered fiber is proposed and investigated both theoretically and experimentally.
分析了单侧CO2激光脉冲曝光导致长周期光纤光栅横截面折射率分布的不均匀性。
The CO2 laser incident on the fiber result in an asymmetric refractive-index distribution within the cross-section of the LPFG.
对长周期光纤光栅传输谱谐振波长的应变特性用耦合模理论进行研究，推导出谐振波长应变灵敏度的解析表达式。
The strain sensitivity characteristic of long-period fibre grating (LPFG) was studied by coupled-mode theory and the strain sensitivity analytic equation of the resonant wavelength was deduced.
分别采用丙烯酸类聚合物与硅树脂材料实现了长周期光纤光栅（LPFG）的大范围波长调谐与温度补偿。
Both acrylate-based polymer and silicone resin were proposed as recoating materials for broadband wavelength tuning and temperature compensation of LPFG.
长周期光纤光栅的谐振峰中心波长随温度的变化呈线性关系。
The relationship between the resonant wavelength shift of the novel LPFGs and the applied temperature is linear.
此外还发现，长光栅对应的抖动周期小，因此对信号的影响也小；
The longer the fiber gratings are, the smaller period of dispersion ripples they have, and subsequently the much less the influence on CATV signals.
分析了长周期光纤光栅(LPG)的啁啾特性和切趾特性，给出了基于LPG的增益平坦滤波器可调的理论依据。
The chirp and apodization characteristics of long-period grating (LPG) are analyzed, and the theoretic foundation of adjustable gain flattening filter based on LPG is provided.
长周期光纤光栅是特定波长范围内的线性滤波器件，该文设计了长周期光纤光栅解调的布拉格光纤光栅温度传感系统。
Long period fiber grating (LPG) is designed as the filter component of edge linear filtering demodulation system for fiber Bragg grating (FBG) temperature sensor.
而且这种长周期光纤光栅的谐振波长随温度变化而线性变化，谐振峰幅值对温度变化不敏感。
The resonant wavelength and resonant peak amplitude of the gain equalizer can be tuned by means of adjusting the temperature and transverse load independently.
首次发现了在双折射光纤中写入的长周期光纤光栅存在对偏振不敏感的谐振峰。
A polarization insensitive LPFG operating at a specific wavelength is achieved by writing the LPFG in a birefringence fiber, for the first time.
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