Broadband wavefront control in a pupil mapping coronagraph

Stuart B. Shaklan; Amir Give'on; Ruslan Belikov; Laurent Pueyo; Olivier Guyon

doi:10.1117/12.734943

19 September 2007 Broadband wavefront control in a pupil mapping coronagraph

Stuart B. Shaklan, Amir Give'on, Ruslan Belikov, Laurent Pueyo, Olivier Guyon

Proceedings Volume 6693, Techniques and Instrumentation for Detection of Exoplanets III; 66930R (2007) https://doi.org/10.1117/12.734943
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

Abstract

Pupil mapping (a.k.a. Phase-Induced Amplitude Apodization, or PIAA) is a promising technique in high-dynamic range stellar coronagraphy that obtains higher throughput and better inner working angle than any other known approach. As with any coronagraph, the optical surface requirements and the diameter of the controllable region in the image plane are tied to the wavefront control system and optical bandpass. For example, in a monochromatic bandpass, a single ideal deformable mirror (DM) can create a dark hole with a diameter limited by its Nyquist frequency, even for highly aberrated optics. In broadband light, the depth of the dark hole is linked to the wavelength dependence of aberrations, their spatial frequency content, and their propagation through the system. We derive requirements on the surface height and reflectivity power spectral densities for optics in the PIAA system and describe a sequential-DM architecture that will achieve high-contrast over a large optical bandwidth.

Citation Download Citation

Stuart B. Shaklan, Amir Give'on, Ruslan Belikov, Laurent Pueyo, and Olivier Guyon "Broadband wavefront control in a pupil mapping coronagraph", Proc. SPIE 6693, Techniques and Instrumentation for Detection of Exoplanets III, 66930R (19 September 2007); https://doi.org/10.1117/12.734943

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