论文部分内容阅读
利用模式理论和传输矩阵法,对基于包层空气孔排布为正八边形对称结构的光子晶体光纤光栅(PCFG)的模式截止特性以及谐振特性进行了研究,得出了此种光子晶体光纤光栅的模式截止条件和可传导的模式,并利用得到的模式截止条件,提出利用相位匹配条件设计相应的光纤光栅周期来得到满足需要的谐振波长,同时给出了谐振峰的反射谱图。研究表明,通过合理选择此种光子晶体光纤光栅的结构参数,可以实现需要的单模传输以及定制波长处的主谐振峰的谐振。所研究的基于包层空气孔排布为正八边形对称结构的锗掺杂光子晶体光纤光栅有望更好地应用于光子晶体光纤光栅传感领域。
Using mode theory and transmission matrix method, the mode cut-off characteristics and resonant characteristics of photonic crystal fiber gratings (PCFGs) based on the arrangement of cladding air holes as a regular octagonal symmetry structure were studied. The photonic crystal fiber grating Mode cutoff condition and conduction mode, and using the obtained mode cut-off condition, the phase matching condition is proposed to design the corresponding fiber grating period to obtain the desired resonant wavelength, and the resonance peak reflection spectrum is also given. The research shows that by reasonably choosing the structural parameters of such a photonic crystal fiber grating, it is possible to achieve the required single-mode transmission and the resonance of the main resonance peak at a custom wavelength. The studied germanium-doped photonic crystal fiber grating based on the cladding air holes arranged in a regular octagonal symmetry structure is expected to be better applied in the field of photonic crystal fiber grating sensing.