窄线宽光子晶体红外光滤波器研究

Study of Narrow Band Photonic Crystal Infrared Filter

利用传输矩阵法研究了光通信中850nm、1330nm和1550nm三个波长的光子晶体滤波器。研究了如何通过选择各层的折射率及宽度使滤波器工作在给定的波长上并具有极窄线宽的方法。经过数值计算分别得出了工作于这三个波长上的光子晶体滤波器的参数。计算结果表明,当缺陷模厚度保持不变时,中心波长会随折射率的增大向长波移动。通过选择适当的参数,可制作出工作于850nm、1330nm和1550nm波长上的线宽为0．0001nm的极窄线宽光子晶体滤波器。

The photonic crystal filters operating at three wavelengths of 850nm, 1330nm and 1550nm in optical communication are studied by using an optical transfer matrix method. How to let the filter operate at a given wavelength and has a extremely narrow band through the selection of the refractive index and width of each layer is also studied. Through calculation, the parameters of the photonic crystal filters operating at the above three wavelengths are obtained. The calculation results have shown that the centeral wavelength can move toward the long wavelength when the thickness of a defect mode is not changed. The extremely narrow band photonic crystal filters with a line width of 0,0001nm at the wavelengths of 850nm, 1330nm and 1550nm can be fabricated when the proper parameters are selected.