@inproceedings{45c12602705d49c9a2de27372b655309,
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 similar to 0.2 degrees 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 1 lambda/D (1 sigma detection) of 5.3x10(-4) (when a conventional adaptive-optics (AO) system is used) or 1.8x10(-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.",
keywords = "Interferometry, Pupil re-mapping, Direct exoplanet imaging, Waveguides, Photonics, INTEGRATED-OPTICS, INSTRUMENT, SELECTION, CIRCUITS, PLANETS, VLT",
author = "Simon Gross and Norris, {Barnaby R.} and Nick Cvetojevic and Nemanja Jovanovic and Alexander Arriola 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",
editor = "JK Rajagopal and MJ CreechEakman and F Malbet",
booktitle = "Optical and Infrared Interferometry IV",
address = "United States",
note = "Conference on Optical and Infrared Interferometry IV ; Conference date: 23-06-2014 Through 27-06-2014",
}