Gerchberg-Saxton Algorithm #465
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Part of a larger PR to implement Gerchberg-Saxon with modal decomposition
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Rewriting of denoise laser to more general decomposition
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| # PROPAGATE THE FIELD FIELD FOWARDS AND BACKWARDS BY 1 MM | ||
| propDist = 2e-3 | ||
| field = [None] * 2 |
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An implementation of the Gerchberg-Saxton which uses modal decomposition to propagate the beam as a summation of modes, as per I. Moulanier et al., Jour. Opt. Soc. Am. B 40, 9 (2023). DOI 10.1364/JOSAB.489884 (currently only Hermite-Gaussian modes are implemented).
In the tutorial, a beam is generated as a summation of modes with random coefficients. Simulated laser data is generated by propagating the laser to different planes (five in in this case). The Gerchberg-Saxton algorithm accepts a list of laser objects and corresponding axial positions from the focal plane. By iterating through the different planes and enforcing field amplitude at every plane while allowing the phase to vary, the phase can be found after a few iterations.
Note: this PR is dependent on #454