High-fidelity holographic beam shaping with optimal transport and phase diversity

• URL: http://arxiv.org/abs/2408.17025v1
• Date: Fri, 30 Aug 2024 05:43:15 GMT
• Title: High-fidelity holographic beam shaping with optimal transport and phase diversity
• Authors: Hunter Swan, Andrii Torchylo, Michael J. Van de Graaff, Jan Rudolph, Jason M. Hogan,
• Abstract summary: A phase-only spatial light modulator (SLM) provides a powerful way to shape laser beams into arbitrary intensity patterns. We show that optimal transport methods can generate approximate solutions to a problem of determining an appropriate SLM phase. We also show that analogous algorithms can be used to measure the intensity and phase of the input beam incident upon the SLM.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: A phase-only spatial light modulator (SLM) provides a powerful way to shape laser beams into arbitrary intensity patterns, but at the cost of a hard computational problem of determining an appropriate SLM phase. Here we show that optimal transport methods can generate approximate solutions to this problem that serve as excellent initializations for iterative phase retrieval algorithms, yielding vortex-free solutions with superior accuracy and efficiency. Additionally, we show that analogous algorithms can be used to measure the intensity and phase of the input beam incident upon the SLM via phase diversity imaging. These techniques furnish flexible and convenient solutions to the computational challenges of beam shaping with an SLM.

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