Second-harmonic conformal transformation for visible and in-situ detection of infrared optical vortices
2023 Conference on Lasers and Electro-Optics (CLEO)（2023）
Abstract
Conformal transformation provides an effective way to detect optical orbital angular momentum (OAM). We demonstrate here a second-harmonic spiral transformation that enables infrared-visible detection of OAM states with a low energy loss. Remarkably, we predict and observe a record-high optical finesse, indicating improved separation efficiency enabled by this method.
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