光学
角动量
物理
渐变折射率纤维
光的轨道角动量
保偏光纤
极化(电化学)
模式音量
长周期光纤光栅
光纤
辐射模式
单模光纤
材料科学
光纤传感器
总角动量
量子力学
化学
物理化学
作者
Zhiyong Bai,Zheng Huang,rui liu,Luping Wu,RANJIANJUN RAN,Zikan Chen,Guoxuan Zhu,Shen Liu,Changrui Liao,Yiping Wang
出处
期刊:Optics Letters
[The Optical Society]
日期:2022-09-27
卷期号:47 (20): 5352-5352
摘要
A chiral long period fiber grating (CLPFG) was designed according to the phase-matching condition and conservation law of angular momentum, and was inscribed in a ring core fiber (RCF). This CLPFG was used to directly excite the ±2nd- and ±3rd-order orbital angular momentum (OAM) modes. The coupling efficiency of the OAM mode is up to 98.7% and the insertion loss is within 0.5 dB. The uniformity of the annular mode intensity distribution, polarization characteristics, and the mode purity of coupled OAM modes were investigated in detail. Results show that the coupled high-order OAM modes possess a relative uniform annular intensity distribution, its mode purity is up to 93.2%, and the helical phase modulation is independent on the polarization state of incident light. These results indicate that the RCF-based CLPFG is an ideal OAM mode converter for future high-capacity optical fiber communication systems.
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