Laboratory demonstration of Phase Induced Amplitude Apodization (PIAA) coronagraph with better than 10-9 contrast

Brian Kern; Olivier Guyon; Andreas Kuhnert; Albert Niessner; Frantz Martinache; Kunjithapatham Balasubramanian

doi:10.1117/12.2022929

26 September 2013 Laboratory demonstration of Phase Induced Amplitude Apodization (PIAA) coronagraph with better than 10^-9 contrast

Brian Kern, Olivier Guyon, Andreas Kuhnert, Albert Niessner, Frantz Martinache, Kunjithapatham Balasubramanian

Author Affiliations +

Proceedings Volume 8864, Techniques and Instrumentation for Detection of Exoplanets VI; 88640R (2013) https://doi.org/10.1117/12.2022929
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

We present coronagraphic images from the Phase Induced Amplitude Apodization (PIAA) coronagraph on NASA's High Contrast Imaging Testbed (HCIT) at the Jet Propulsion Lab, showing contrasts of 5×10⁻¹⁰ averaged from 2-4 λ/D, in monochromatic light at 808 nm. In parallel with the coronagraph and its deformable mirror and coronagraphic wavefront control, we also demonstrate a low-order wavefront control system, giving 100× rms suppression of introduced tip/tilt disturbances down to residual levels of 10⁻³ λ/D. Current limitations, as well as broadband (10% fractional bandpass) preliminary results are discussed.

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Brian Kern, Olivier Guyon, Andreas Kuhnert, Albert Niessner, Frantz Martinache, and Kunjithapatham Balasubramanian "Laboratory demonstration of Phase Induced Amplitude Apodization (PIAA) coronagraph with better than 10^-9 contrast", Proc. SPIE 8864, Techniques and Instrumentation for Detection of Exoplanets VI, 88640R (26 September 2013); https://doi.org/10.1117/12.2022929

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