Saghaei Hamed, Ebnali-Heidari Majid, Moravvej-Farshi Mohammad Kazem
Appl Opt. 2015 Mar 10;54(8):2072-9. doi: 10.1364/AO.54.002072.
Using numerical analysis, we compare the results of optofluidic and rod filling techniques for the broadening of supercontinuum spectra generated by As2Se3 chalcogenide photonic crystal fibers (PCFs). The numerical results show that when air-holes constituting the innermost ring in a PCF made of As2Se3-based chalcogenide glass are filled with rods of As2Se3-based chalcogenide glass, over a wide range of mid-IR wavelengths, an ultra-flattened near-zero dispersion can be obtained, while the total loss is negligible and the PCF nonlinearity is very high. The simulations also show that when a 50 fs input optical pulse of 10 kW peak power and center wavelength of 4.6 μm is launched into a 50 mm long rod-filled chalcogenide PCF, a ripple-free spectral broadening as wide as 3.86 μm can be obtained.
我们使用数值分析方法，比较了光流体和棒填充技术对基于As2Se3硫系光子晶体光纤（PCF）产生的超连续谱展宽的效果。数值结果表明，当由基于As2Se3的硫系玻璃制成的PCF中构成最内环的气孔填充基于As2Se3的硫系玻璃棒时，在很宽的中红外波长范围内，可以获得超平坦的近零色散，而总损耗可忽略不计，且PCF的非线性非常高。模拟还表明，当将一个峰值功率为10 kW、中心波长为4.6μm的50 fs输入光脉冲注入一根50 mm长的棒填充硫系PCF时，可以获得高达3.86μm的无纹波光谱展宽。
