The band properties of photonic crystal and the realization of band tunability were studied by finite element method . First the physical mechanism of generation of photonic bandgap was theoretically analyzed .

论文采用有限元方法针对二维光子晶体能带特性及其能带 可 调谐性的实现展开的研究。首先，理论分析了二维光子晶体产生光子带隙的物理机理。

The characteristics tunability of CO2 waveguide lasers have been analyzed theoretically and experimentally .

本文对CO2波导激光器的 可 调谐性能进行了理论分析和实验研究。

A new passive device plastic fiber grating is proposed based on our researches on fiber grating tunability and plastic fibers . We analyzed its characteristics .

在对光纤光栅 调谐和塑料光纤的研究基础上，提出了一种新的无源器件&塑料光纤光栅。

In the experiment the tunability of filter could be realized by changing the input light wavelength and the effect of optical source coherence length on the performance of incoherent photonic microwave filter is especially researched .

实验中，滤波器的 调谐通过改变输入光波波长实现，其中重点研究了光源相干长度对光子微波滤波器性能的影响。

A widely tunable multi-wavelength fiber laser is established based on cascaded stimulated Brillouin scattering in a compact line cavity and the influence of the Brillouin pump power and EDFA pump power on the output stokes lines and wavelength tunability of the fiber laser are investigated .

搭建了基于受激布里渊散射的可调谐多波长光纤激光器，研究了注入 种子光功率和掺铒光纤放大器的泵浦光功率对多波长谱线输出和波长 调谐 特性的影响。

By changing the ratio of segmented pumping current densities a tunability of 75A is obtained ;

通过改变分段泵浦电流密度的比例，获得了范围达75的 可 调谐作用；

Tunability of optical parameters of width-variable bent elliptical microfocus mirror

变宽度压弯椭圆柱面聚焦镜的光学参数 可 调性

The Fano resonance can be achieved by exciting the hexapole and octupole dark modes which enhanced the tunability of Fano resonance .

Fano共振能够通过激发大圆环的六极和八极共振峰来实现，这大大提高了圆环结构的Fano共振的 调谐 性。

The wavelength tuning experiments have been made by use of the ordinary index-coupled two-segment DFB semiconductor lasers . The single-mode oscillation and wavelength tunability have been realized by changing currents of two segments .

采用国产普通折射率耦合型两段式DFB半导体激光器进行了波长调谐实验研究，实验结果表明，通过分别调节激光器两段的工作电流，不仅可以使器件单模工作，而且还能进行波长 调谐。

It is found that the tunability of films with multilayer structure increases and the dissipation factor did not change evidently .

与外延多层薄膜不同，本文发现多层结构在显著提高薄膜的 介 电 常数 和 调谐 率的同时， 介 电损耗没有明显增加。

Preparation and Dielectric Tunability of K Doped PST Ferroelectric Thin Film

掺杂PST薄膜的制备与介电 调谐 性能研究

It has the advantages of high effciency wide tunability and high power .

具有高效率， 可 调谐及 可能 获得大功率 相干 辐射等一系列优点。

And for the application of photonic crystal waveguide and optical passive devices the tunability of band structure of photonic crystal has been the bottleneck of wide application in optical communication for photonic crystals .

在光子晶体光波导和光学无源器件的应用中，光子晶体的能带结构的 可 调谐 性 成为光子晶体在光通讯中广泛应用的瓶颈。

The origin of dielectric tunability is the non-linear polarization under applied DC electric field .

本文还分析探讨了 电介质材料介电性能电场 可 调的起源和 机理， 认为外场作用下的非线性极化 响应是介电 性能 电 可 调的根源。

Studies on Barium Strontium Titanate Nonlinear Dielectric Thin Films with High Dielectric Tunability and Low Dissipation Factor

钛酸锶钡非线性介质薄膜的高介电 调谐 率和低介电损耗的研究

In addition bst-mt composite ceramics have higher tunability and better microwave .

复合陶瓷材料，并对其相结构、介电以及 可 调性和微波特性进行了研究。

The tunability of millimeter wave free electron laser was observed .

观察到了毫米波自由电子激光器的 调谐 特性。

The center frequency tunability characteristic of the filter is investigated as well .

研究了该滤波器的中心频率的 可 调谐特性。

The broad fluorescence spectrum of the organic dyes suggests a broad tunability range for lasers using them as the active material .

有机染料具有宽荧光光谱使人们想到，若用它们作为激光介质，则激光器 就会有宽的 调谱范围。

It found that the BST thin films with rich titanium precipitate TiO2 and their dielectric constant dielectric loss and tunability all increase with the increasing the ratio of A and B of perovskite structure ( ABO3 ) .

结果表明富钛薄膜中析出了TiO2相，薄膜的介电常数、损耗和 调谐 量随着钙钛矿结构（ABO3）中A/B的增加而增加；当A/B为0.68时，有最小的介电损耗0.017；

The theoretical analysis and experimental results of the wavelength tunability of a tandem optical parametric oscillator ( TOPO ) based on a single nonlinear crystal are presented .

报道了基于单块非线性晶体的双光参量振荡器（TOPO）波长 调谐的理论分析和实验结果。

The low loss and tunability of superconductors at THz frequencies make them suitable for fabricating THz functional devices .

超导材料在太赫兹频段 具有 极低的损耗和 良好 的 调谐 特性，非常适合制作太赫兹功能器件。

And tunability of part of the samples were obtained on base of which phenomenological coefficient was calculated .

对部分样品的 直流 电场 可 调性进行了测量，计算出样品对应的唯象系数。

Interdigital electrodes with small distance would decrease modulation voltage and improve tunability effectively .

采用小尺度间距叉指电极 可有效地降低 介 电调制电压，提高 介 电 可 调性。

This thesis reviewed the development of the microwave tunable ferroelectric thin film materials summarized the application of sol-gel on the materials and introduced the principle and application of the microwave tunability in brief .

本文全面综述了微波可调铁电薄膜材料的研究发展，总结了溶胶凝胶技术在制备此类材料中的应用，简要介绍了铁电材料微波 可 调的基本原理及其应用。

Therefore the effective control theory and method of tunability of photonic crystal band structure must be analyzed systematically .

因此，必须系统分析光子晶体的能带结构 可 调谐 性的有效控制理论和方法。

The application of fringing electric field to decrease modulation voltage and increase tunability is a great breakthrough for the application of ferroelectric thin film in dielectric tunable field .

这种利用边缘电场降低介电调制电压和提高介电 可 调性对于铁电薄膜在介电可调领域的应用来说是一个很大的突破。

Barium strontium titanate ( BST ) thin films had been investigated as a potential voltage tunable element for microwave phase shifter applications because of their high tunability relatively low loss and fast switching speed .

钛酸锶钡（BST）薄膜因其具有高的 介 电 调谐 量，相对低的损耗 tg δ和快的开关速度，在微波移相器的应用中 显示出 巨大 优势。