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We demonstrate the simultaneous creation of OAM-carrying, Gaussian beamlets around a perfect vortex envelope. Each beamlet is generated with a unique frequency, allowing beat frequencies to be recovered at the receiver providing sensing information in underwater environments.
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J. Wiley, E. Robertson, K. Dai, J. Free, J. K. Miller, E. G. Johnson, "Generation and detection of OAM-carrying beamlets for underwater optical systems using a HOBBIT system," Proc. SPIE 12399, Solid State Lasers XXXII: Technology and Devices, 1239906 (8 March 2023); https://doi.org/10.1117/12.2655980