共查询到18条相似文献,搜索用时 46 毫秒
1.
2.
光子晶体光纤(PCF)的色散特性与传统光纤有显著的差别。从光子晶体光纤的结构特点出发,分析了PCF的色散特性,介绍了其潜在应用。 相似文献
3.
4.
5.
为了得到在高背景噪音下对弱信号光的提取,实验研究了基于87Rb D1线5S1/2F=2→5P1/2 F'=1跃迁的795 nm法拉第反常色散光学滤波器.充铷的样品池所含87Rb的比例高于自然铷,样品池处在均匀的磁场中并且夹在两个相互正交的偏振片之间.入射的探测光通过样品池,与原子相互作用,由于法拉第旋转效应实现滤波功能.改变实验条件,透射结果随之明显变化.当温度从340 K升高到360 K,透射谱的变化情况被细致记录,并且分析了导致透射情况变化的原因.在适当的工作温度以及磁场条件下,得到线宽为约220 MHz的超窄带透射谱线,谱线透过率约为48%.87Rb D1线的实验结果优于85Rb的吸收线. 相似文献
6.
7.
利用矢量有效折射率方法对光子晶体光纤(PCF)的色散补偿特性进行了数值模拟,研究发现通过调节光子晶体光纤包层的空气穴节距或空气穴大小可以灵活地设计光子晶体光纤的色散系数D、色散斜率Dslope以及κ值,可以设计在波长1.55μm附近具有较大绝对值的正常色散和负色散斜率的色散补偿光子晶体光纤,使光通信中的普通单模光纤(G.652)或非零色散位移光纤(G.655)在1.55μm低损耗窗口得到较好的色散补偿.数值模拟和分析表明色散补偿光子晶体光纤的研制具有很大的发展潜力.
关键词:
光子晶体光纤
色散
色散斜率
色散补偿 相似文献
8.
9.
应用传输矩阵法研究一维光子晶体的色散特性,数值模拟得到了一维光子晶体横电(TE)模、横磁(TM)模的色散特性,研究结果为一维光子晶体器件的设计提供了理论依据. 相似文献
10.
一维光子晶体反常折射的数值分析 总被引:3,自引:4,他引:3
分析了一维光子晶体中产生反常折射的原因,根据波向量图对光在其中传播的方式做了定性的分析.根据一维光子晶体中具有波频率与波向量之间明确解析表达式的特点,指出利用此关系式能方便地对光在其中的传播方式进行深入的分析.利用这种方法,文中分析了光在其中传播的一些性质.指出光的偏移性质与角度和频率密切相关. 相似文献
11.
Ultra-narrow bandwidth optical filters consisting of one-dimensional photonic crystals with anomalous dispersion materials 下载免费PDF全文
We present a new type of optical filter with an ultra-narrow bandwidth and a wide field-of-view (FOV). This kind of optical filter consists of one-dimensional photonic crystal (PC) incorporating an anomalous-dispersion-material (ADM) with, for instance, an anomalous dispersion of 6P3/2←6S1/2 hyperfine structure transition of a caesium atom. The transmission spectra of optical filters are calculated by using the transfer-matrix method. The simulation results show that the designed optical filter has a bandwidth narrower than 0.33GHz and a wide FOV of ±30°as well. The response of transmission spectrum to an external magnetic field is also investigated. 相似文献
12.
13.
The anomalous dispersion in one-dimensional plasma photonic crystals (1-DPPCs) is studied. The width of band pass and band gap are compressed, the phase velocity decreases and the cup-off frequency comes close to the frequency of plasma when EM wave oblique incidence on 1-DPPCs. The band gaps are affected by the thickness of plasma, the dielectric constant of the dielectric material, the plasma density and the angle of incidence. Superluminal negative group velocity is discovered in this study. This character is interesting for scientists and may have a potential application. 相似文献
14.
用时域有限差分法研究了电磁波在等离子体光子晶体中的传播特性。数值模拟中使用完全匹配层吸收边界条件,计算了电磁波通过等离子体光子晶体的反射和透射系数。讨论了等离子体密度、等离子体温度、介电常数比和引入缺陷层对等离子体光子晶体光子带隙的影响。 相似文献
15.
由于一维磁光子晶体能同时展示出很好的光透射率和法拉第旋转,故可用于实现小尺度的磁光隔离器。采用传输矩阵法研究了由磁光膜(Bi∶YIG)和电介质膜(Ta2O5,SiO2)构成的一维磁光子晶体,分别讨论了在垂直入射和斜入射条件下的法拉第效应,并给出了几种可行性结构,对磁光隔离器件的进一步改进设计具有一定的参考价值。 相似文献
16.
AnalysesofthePropertiesofTunableFaradayAnomalousDispersionOpticalFilterat589nmAnalysesofthePropertiesofTunableFaradayAnomalou... 相似文献
17.
Properties of omnidirectional photonic band gap in one-dimensional staggered plasma photonic crystals 总被引:1,自引:0,他引:1
Hai-feng Zhang Shao-bin Liu Xiang-kun KongBo-rui Bian Hui-cao Zhao 《Optics Communications》2012,285(24):5235-5241
In this paper, the properties of the omnidirectional photonic band gap (OBG) realized by one-dimensional (1D) photonic crystals (PCs) with a staggered structure which is composed of plasma and isotropic dielectric layer have been theoretically studied by the transfer matrix method (TMM). From the numerical results, it has been shown that such OBG is insensitive to the incident angle and the polarization of electromagnetic wave (EM wave), and the frequency range and central frequency of OBG can be effectively controlled by adjusting the plasma frequency, the average thickness of plasma layer, the average thickness of dielectric layer and staggered parameters, respectively. The frequency range of OBG can be notably enlarged with increasing the plasma frequency, average thickness of plasma layer, respectively. Moreover, the bandwidth of OBG can be narrowed with increasing the average thickness of dielectric layer. Changing staggered parameters of dielectric and plasma layer means that the OBG can be tuned. It is shown that 1D plasma dielectric photonic crystals (PPCs) with such staggered structure have a superior feature in the enhancement of frequency range of OBG compared with the conventional 1D binary PPCs. This kind of OBG has potential applications in filters, microcavities, and fibers, etc. 相似文献
18.