Abstract
We propose, design and fabricate all-fiber broadband orbital angular momentum (OAM) generator and OAM 1×2 coupler in conventional graded-index multimode fiber, based on which OAM±1 and OAM±2 modes with high purity from 1480 nm to 1620nm are generated and OAM±1 modes are split into two branches over the C-band.
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