Jung, Yongmin, Kang, Qiongyue, Yoo, Seongwoo, Sidharthan, Raghuraman, Ho, Daryl, Ramachandran, Siddharth, Alam, Shaif-ul and Richardson, David
Optical Orbital Angular Momentum Amplifier based on an Air-Hole Erbium Doped Fiber
Journal of Lightwave Technology, . (doi:10.1109/JLT.2017.2651145).
We present for the first time broadband operation of an optical orbital angular momentum (OAM) erbium doped fiber amplifier for lower order OAM modes based on an air-hole erbium-doped fiber designed and fabricated to provide significant mode splitting between the OAM |l|=1 modes and the adjacent vector modes. Up to 15.7dB gain is obtained using a cladding pumped amplifier configuration for OAM modes with topological charge |l|=1 in the operational wavelength range 1545-1600nm.
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