Fu Cailing, Liu Shen, Wang Ying, Bai Zhiyong, He Jun, Liao Changrui, Zhang Yan, Zhang Feng, Yu Bin, Gao Shecheng, Li Zhaohui, Wang Yiping
Opt Lett. 2018 Apr 15;43(8):1786-1789. doi: 10.1364/OL.43.001786.
High-order orbital angular momentum (OAM) modes, namely, OAM and OAM, were generated and demonstrated experimentally by twisting a solid-core hexagonal photonic crystal fiber (PCF) during hydrogen-oxygen flame heating. Leaky orbital resonances in the cladding depend strongly on the twist rate and length of the helical PCF. Moreover, the generated high-order OAM mode could be a polarized mode. The secret of the successful observation of high-order modes is that leaky orbital resonances in the twisted PCF cladding have a high coupling efficiency of more than -20 dB.
通过在氢氧火焰加热过程中扭转实心六边形光子晶体光纤（PCF），实验产生并演示了高阶轨道角动量（OAM）模式，即OAM和OAM。包层中的泄漏轨道共振强烈依赖于螺旋PCF的扭转速率和长度。此外，所产生的高阶OAM模式可能是一种偏振模式。成功观测到高阶模式的秘诀在于，扭转PCF包层中的泄漏轨道共振具有超过-20 dB的高耦合效率。
