MA Ying-ying, CHEN He-ming, BAI Xiu-li. A New Type of Graded-index Ring Fiber Supporting Multi-OAM Modes. [J]. Study on Optical communication (2):43-46(2017)
MA Ying-ying, CHEN He-ming, BAI Xiu-li. A New Type of Graded-index Ring Fiber Supporting Multi-OAM Modes. [J]. Study on Optical communication (2):43-46(2017) DOI: 10.13756/j.gtxyj.2017.02.013.
A New Type of Graded-index Ring Fiber Supporting Multi-OAM Modes
A new type of graded-index ring fiber with 0.256 up-doping is proposed which can support 16 OAM modes.A FiniteElement Method(FEM)is used to calculate the effective indices of all the vector modes based on the measured index profile.The mode index difference can be improved to 6.656×10
-3
which reduces the coupling among OAM modes.Furthermore
due to the gradual change of the fiber refractive index
the purity of the synthesized OAM light can attain 100%
and thus reduce the intrinsic mode crosstalk.
关键词
轨道角动量有限元分析法有效折射率差模间串扰
Keywords
orbital angular momentumFEAeffective refractive indexmode crosstalk