[3] M PRASHANT. Trends inoptical fibre communication. Academic Journal of Physical Sciences, 1, 7-12(2019).
[12] SUN Xibo, GENG Yuanchao, ZHU Qihua, et al. Edgedip air ce fiber f improvement of the transmission of higherder OAM modes[C]. SPIE, 2018, 10710: 107103E.
[28] WANG Lixian, CSI A, RUSH L, et al. Investigation of bital angular momentum mode purity in airce optical fibers[C]. IEEE, 2016: 203204.https:www.researchgate.publication308082089_Investigation_of_bital_angular_momentum_mode_purity_in_airce_optical_fibers