Laguerre-Gaussian coronagraph

Joel A. Carpenter; Nicolas K. Fontaine; Sergio G. Leon-Saval

doi:10.1117/12.2560588

13 December 2020 Laguerre-Gaussian coronagraph

Joel A. Carpenter, Nicolas K. Fontaine, Sergio G. Leon-Saval

Proceedings Volume 11446, Optical and Infrared Interferometry and Imaging VII; 114462E (2020) https://doi.org/10.1117/12.2560588
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

We propose the use of Laguerre-Gaussian (LG) mode sorters to spatially filter and analyse light from a telescope. An LG mode sorter spatially decomposes an incoming beam into a Cartesian grid of identical Gaussian diffraction-limited spots. Each spot contains a particular LG spatial component of the original beam. These individual LG components, which are now independently accessible as spatially separated Gaussian spots could be analysed and processed in various ways. For example, circularly symmetric components could be removed, in a function similar to a vortex coronagraph. Individual LG spatial components could also be selectively interfered and spectrally decomposed.

Citation Download Citation

Joel A. Carpenter, Nicolas K. Fontaine, and Sergio G. Leon-Saval "Laguerre-Gaussian coronagraph", Proc. SPIE 11446, Optical and Infrared Interferometry and Imaging VII, 114462E (13 December 2020); https://doi.org/10.1117/12.2560588

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