AI Article Synopsis
- The study introduces a new method to identify the radial index p of Laguerre-Gaussian modes using projective measurement with two phase screens.
- By transforming high-order LGp0 modes into near-Gaussian distributions, the approach ensures compatibility with single-mode fibers while maintaining mode orthogonality.
- The authors assert that their technique, which leverages universal phase-retrieval methods, allows for effective characterization of the radial spatial profile of optical fields without interference from crosstalk.
Article Abstract
We propose and demonstrate a simple and easy-to-implement projective-measurement protocol to determine the radial index p of a Laguerre-Gaussian (LGpl) mode. Our method entails converting any specified high-order LGp0 mode into a near-Gaussian distribution that matches the fundamental mode of a single-mode fiber (SMF) through the use of two phase screens (unitary transforms) obtained by applying a phase-retrieval algorithm. The unitary transforms preserve the orthogonality of modes before the SMF and guarantee that our protocol can, in principle, be free of crosstalk. We measure the coupling efficiency of the transformed radial modes to the SMF for different pairs of phase screens. Because of the universality of phase-retrieval methods, we believe that our protocol provides an efficient way of fully characterizing the radial spatial profile of an optical field.
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Source |
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11533825 | PMC |
| http://dx.doi.org/10.1364/OL.43.006101 | DOI Listing |
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