This paper proposes a novel photonic crystal optical fiber which can support 30 orbital angular momentum(OAM)modes transmission and possesses relatively flat and low dispersion.The OAM modes can be well-separated due ...This paper proposes a novel photonic crystal optical fiber which can support 30 orbital angular momentum(OAM)modes transmission and possesses relatively flat and low dispersion.The OAM modes can be well-separated due to the large effective refractive index difference(above 10^-4)between the eigenmodes.The only material of the designed fiber is silica.The dispersion of each OAM mode is controlled in the range of 50-100 ps·nm^-1·km^-1 and the total dispersion variation is below 10 ps·nm^-1·km^-1 from 1500 nm to 1600 nm.Moreover,the confinement loss of each OAM mode is below 8.17×10^-10 dB/m at 1550 nm,and the nonlinear coefficients is less than 0.71 W^-1/km for all modes at 1550 nm.With all these good features,this proposed optical fiber is promising to be applied in fiberbased OAM communication systems.展开更多
基金supported by the National Natural Science Foundation of China(Nos.11704283,11804250 and U1509207)the Tianjin Natural Science Foundation(Nos.19JCQNJC01500 and 18JCQNJC71300)。
文摘This paper proposes a novel photonic crystal optical fiber which can support 30 orbital angular momentum(OAM)modes transmission and possesses relatively flat and low dispersion.The OAM modes can be well-separated due to the large effective refractive index difference(above 10^-4)between the eigenmodes.The only material of the designed fiber is silica.The dispersion of each OAM mode is controlled in the range of 50-100 ps·nm^-1·km^-1 and the total dispersion variation is below 10 ps·nm^-1·km^-1 from 1500 nm to 1600 nm.Moreover,the confinement loss of each OAM mode is below 8.17×10^-10 dB/m at 1550 nm,and the nonlinear coefficients is less than 0.71 W^-1/km for all modes at 1550 nm.With all these good features,this proposed optical fiber is promising to be applied in fiberbased OAM communication systems.
