Hasan Md Rabiul, Hasan Md Imran, Anower Md Shamim
Appl Opt. 2015 Nov 10;54(32):9456-61. doi: 10.1364/AO.54.009456.
A defected-core spiral photonic crystal fiber is proposed to achieve very large negative flattened dispersion and small confinement loss. Simulation results reveal that the designed structure exhibits very large flattened dispersion over S+C+L+U wavelength bands and an average dispersion of about -720.7 ps nm(-1) km(-1) with an absolute dispersion variation of 12.7 ps nm(-1) km(-1) over the wavelength ranging from 1.45 to 1.65 μm. The proposed fiber has five air-hole rings in the cladding leading to very small confinement loss of 0.00111 dB/km at the excitation wavelength of 1.55 μm. The tolerance of the fiber dispersion of ±2% changing in the structural parameters is investigated for practical conditions.
提出了一种缺陷纤芯螺旋光子晶体光纤，以实现非常大的负平坦色散和小的限制损耗。仿真结果表明，所设计的结构在S+C+L+U波段呈现出非常大的平坦色散，在1.45至1.65μm波长范围内平均色散约为-720.7 ps·nm⁻¹·km⁻¹，绝对色散变化为12.7 ps·nm⁻¹·km⁻¹。所提出的光纤包层中有五个气孔环，在1.55μm激发波长下导致非常小的限制损耗，为0.00111 dB/km。针对实际情况研究了结构参数变化±2%时光纤色散的容差。
