标题： 用于色散补偿的七边形光子晶体光纤，具有非常低的限制损耗 显示英文标题

标题： Heptagonal Photonic Crystal Fiber for Dispersion Compensation with a Very Low Confinement Loss

摘要： 本文提出了一种具有七边形芯和七边形包层的光子晶体光纤（PCF），用于色散补偿。 使用有限元法（FEM）探索了所提出的PCF的不同光学特性。 所提出的色散补偿PCF（DC-PCF）在$1550 nm$波长处表现出非常大的负色散，值为$-940 ps/(nm-km)$。 在$1390$到$1700 nm$波长范围（$310 nm$带）内，DC-PCF的总色散为$-420.1$到$-1160 ps/(nm-km)$。 相对色散斜率是$0.0036 nm^{-1}$，这与标准单模光纤完全匹配。 此外，它在$1550 nm$波长下表现出非常低的限制损耗约为$10^{-5} dB/km$和低非线性度为$45 W^{-1}km^{-1}$。 由于所提出的 DC-PCF 具有非常高的负色散和低非线性，它可以在光纤通信中的宽带色散补偿中成为一种有潜力的候选方案。 显示英文摘要

摘要： This paper presents a photonic crystal fiber (PCF) with heptagonal core and heptagonal cladding for dispersion compensation. Different optical properties of the suggested PCF are explored using the finite element method (FEM). The proposed dispersion compensating PCF (DC-PCF) exhibits a very large negative chromatic dispersion of $-940 ps/(nm-km)$ at $1550 nm$ wavelength. The overall dispersion of the DC-PCF is $-420.1$ to $-1160 ps/(nm-km)$ in the wavelength range of $1390$ to $1700 nm$ ($310 nm$ band). The relative dispersion slope is $0.0036 nm^{-1}$ which is a perfect match with the standard single mode fibers. Moreover, it exhibits a very low confinement loss of about $10^{-5} dB/km$ and low nonlinearity of $45 W^{-1}km^{-1}$ at $1550 nm$ wavelength. Since the suggested DC-PCF has very high negative dispersion and low nonlinearity, it can be a potential candidate for broadband dispersion compensation in fiber-optic communication.