Deformation of orbital angular momentum modes in bending ring-core fiber

• 作 者: 严皓哲 李尚远 谢正洋 郑小平 杜城 张汉一 周炳琨
• 机 构: Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engine
• 出 处: Chinese Optics Letters
• 发表日期: 2017年03期
• 关键词: bending momentum orbital angular match sizes refractive outer radius straight

We present the investigation on deformation of orbital angular momentum(OAM)modes in bending ring-core fibers(RCFs)with different structure sizes through numerical and experimental studies.The effective refractive index differences of even and odd fiber eigenmodes,which constitute OAM_(±1;1) modes,induced by RCF bending and their impacts on the OAM_(±1;1) mode intensity distributions are analyzed.Bending experiments are also carried out on three different RCFs,and the results match well with simulation values.It is found that RCFs with smaller inner and outer radii show preferable tolerance to the fiber bending.

We present the investigation on deformation of orbital angular momentum (OAM) modes in bending ring-core fibers (RCFs) with different structure sizes through numerical and experimental studies. The effective refractive index differences differences and even fiber eigenmodes, which constitute OAM_ (± 1; 1) modes, induced by RCF bending and their impacts on the OAM_ (± 1; 1) mode intensity distributions are analyzed.Bending conversions are also carried on three different RCFs, and the results match well with simulation values. It is found that RCFs with smaller inner and outer radii show preferable tolerance to the fiber bending.