@inproceedings{822fd9bb725340708c029306ab20fde7,
title = "High performance 3D waveguide architecture for astronomical pupil-remapping interferometry",
abstract = "Here we demonstrate a new generation of photonic pupil-remapping devices which build upon the interferometric framework developed for the Dragonfly instrument: a high contrast waveguide-based device which recovers robust complex visibility observables. New generation Dragonfly devices overcome problems caused by interference from unguided light and low throughput, promising unprecedented on-sky performance. Closure phase measurement scatter of only ~0.2° has been achieved, with waveguide throughputs of > 70%. This translates to a maximum contrast-ratio sensitivity (between the host star and its orbiting planet) at 1λ/D (1σ detection) of 5.3×10-4 (when a conventional adaptive-optics (AO) system is used) or 1.8×10-4 (for typical 'extreme-AO' performance), improving even further when random error is minimised by averaging over multiple exposures. This is an order of magnitude beyond conventional pupil-segmenting interferometry techniques (such as aperture masking), allowing a previously inaccessible part of the star to planet contrast-separation parameter space to be explored.",
author = "Simon Gross and Norris, {Barnaby R.} and Nick Cvetojevic and Nemanja Jovanovic and {Arriola Martiarena}, Alexander and Stewart, {Paul N.} and Lawrence, {Jon S.} and Withford, {Michael J.} and Tuthill, {Peter G.}",
year = "2014",
doi = "10.1117/12.2057282",
language = "English",
series = "Proceedings of SPIE",
publisher = "SPIE",
pages = "91461B--1--91461B--12",
editor = "Rajagopal, {Jayadev K.} and Creech-Eakman, {Michelle J.} and Fabien Malbet",
booktitle = "Optical and infrared interferometry IV",
address = "United States",
note = "Optical and Infrared Interferometry IV ; Conference date: 23-06-2014 Through 27-06-2014",
}