激活或高折射率介质掺杂同轴光子晶体光纤增益特性的研究

文中在缺陷介质中掺入激活杂质或高折射率杂质时,数值研究了同轴光子晶体光纤的掺杂局域场特征以及受激辐射增强使透射率大于1现象和掺杂层复有效折射率负的虚部之间的内在规律,由此进一步说明,因受激幅射放大,而在掺杂同轴光子晶体光纤中获得窄的高增益透射带,由此带隙结构形成波分复用技术的多个传输信道,可应用于密集波分复用(DWDM)光通信系统.

Study on the Optical Gain of Doped Same Axis Photonic Crystals Fiber with Active or High Refractive Index Impurity

The characteristics of localized fields of doped photonic crystal fibers(PCFs) with same axis are studied by numerical simulation method in the paper.An interesting phenomenon is produced with the enhancement of stimulated radiation,which is the transmittivity being greater than one.And the numerical results show clearly the relation between the characteristics of localized fields,and the negative imaginary component of the complex effective index of refraction of doped medium.Based on the relations the amplification of stimulated emission can be realized by introducing active impurities or high refractive index impurities into the defect media of PCFs with same axis.Furthermore,the narrow transmission bands can be obtained by introducing line defects into the doped PCFs,which are used as channels in wavelength-division multiplexed(WDM) communication systems.And the doped PCFs can also be used to make optical amplifiers employed in dense WDM communication systems.