Generation of Orbital Angular Momentum Beam Using Fiber-to-Fiber Butt Coupling

IEEE Photonics Journal

Cheng Du¹  Li Shen²  Ruixuan Zhao²  Jian Wang²  Zhe Xu²  Shuhui Li² 

[1] Fiberhome Telecommunication Technologies Co., Ltd, Wuhan, China;Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China;

关键词: Optical vortices;    fiber optics.;   

DOI  :  10.1109/JPHOT.2018.2856263

来源: DOAJ

【 摘 要 】

We experimentally demonstrate a simple scheme for broadband generation of orbital angular momentum (OAM) using a fiber-based structure. A standard single-mode fiber (SMF) is stuck to a two-mode fiber (TMF) with specific offsets and tilt angles to realize high-order fiber mode conversion. By adjusting the polarization controllers implemented on the SMF and TWF accompanied with a polarizer filter, one can selectively obtain LP11 mode or OAM modes with l = ±1 at the output end of the TMF. We show the high-purity (extinction ratio >20 dB) generation of OAM modes within a wide range from 1480 to 1640 nm.

【 授权许可】

Unknown