激光与光电子学进展, 2018, 55 (7): 070604, 网络出版: 2018-07-20
一种高双折射负色散的缺陷型光子晶体光纤 下载: 633次
A Defect Photonic Crystal Fiber With High Birefringence and Negative Dispersion
光子晶体光纤 高双折射 高非线性 负色散 低限制损耗 有限元法 photonic crystal fiber high birefringence high nonlinearity negative dispersion low confinement loss finite element method
摘要
设计了一种中心带有椭圆空气孔缺陷的光子晶体光纤,采用全矢量有限元法研究了该光纤基模的电场分布、双折射、色散、非线性及限制损耗等特性。结果表明,电场能量被束缚在光纤的纤芯。在λ=1.55 μm处,光纤的双折射为5.958×10-2,达到10-2数量级;在1.50~1.60 μm波段范围内,色散值在(-549.2±5) ps/(nm·km)范围内,具有高负平坦色散。此外,该光纤的x偏振基模的非线性系数为46.82 W-1·km-1,低损耗值为5.413×10-4 dB/km,并且在y方向上两个基模偏振态的限制损耗是x方向的6423倍。该光子晶体光纤具有高双折射、高非线性、高负平坦色散、低损耗的特点,在光纤传感、偏振控制、色散补偿及非线性光学等领域具有广阔的应用前景。
Abstract
A new type of photonic crystal fiber with elliptical air holes in the center is designed, and we study the properties including electric field distribution, birefringence, dispersion, nonlinearity, and confinement loss of fundamental mode of this fiber by using full vector finite element method. The results show that the electric field energy is bound in the fiber core. The birefringence can be reached 5.958×10-2, which reaches the magnitude of 10-2 at a wavelength of 1.55 μm. In the wavelength range from 1.50 μm to 1.60 μm, the dispersion is (-549.2±5) ps/(nm·km), which is a highly flattened negative dispersion. The nonlinear coefficient in x-polarization of this fiber is 46.82 W-1·km-1, and the low confinement loss is 5.413×10-4 dB/km at 1.55 μm, and the confinement losses of the polarization states in the y direction are 6423 times than those in the x direction. The proposed photonic crystal fiber has the characteristic of high birefringence, high nonlinearity, highly flattened negative dispersion, and low confinement loss, which could be widely used in the field of optical fiber sensing, polarization control, dispersion compensation, nonlinear optics and so on.
廖昆, 廖健飞, 谢应茂, 王形华, 田华. 一种高双折射负色散的缺陷型光子晶体光纤[J]. 激光与光电子学进展, 2018, 55(7): 070604. Liao Kun, Liao Jianfei, Xie Yingmao, Wang Xinghua, Tian Hua. A Defect Photonic Crystal Fiber With High Birefringence and Negative Dispersion[J]. Laser & Optoelectronics Progress, 2018, 55(7): 070604.