168 citations · 405 across the 18 of their papers we have counts for
19 papers
Optical gains measurement with a gain scheduling camera: On-sky demonstration with PAPYRUS and perspectives
A. Striffling, C. -T. Héritier, R. J. -L Fétick +4
Reaching the high angular resolution and contrast level desired for exoplanetary science requires us to equip large telescopes with extreme adaptive optics (XAO) systems to compens…
Strategy for sensing petal mode in presence of AO residual turbulence with pyramid wavefront sensor
Nicolas Levraud, Vincent Chambouleyron, Jean François Sauvage +9
With the Extremely Large Telescope-generation telescopes come new challenges. The complexity of these telescopes' pupil creates new problems for Adaptive Optics. In particular, the…
Modeling noise propagation in Fourier-filtering wavefront sensing, fundamental limits and quantitative comparison
Vincent Chambouleyron, Olivier Fauvarque, Cédric Plantet +5
Adaptive optics (AO) is a technique allowing to drastically improve ground-based telescopes angular resolution. The wavefront sensor (WFS) is one of the key components of such syst…
Optimizing Fourier-Filtering WFS to reach sensitivity close to the fundamental limit
Vincent Chambouleyron, Olivier Fauvarque, Cédric Plantet +5
To reach the full potential of the new generation of ground based telescopes, an extremely fine adjustment of the phase is required. Wavefront control and correction before detecti…
Three-sided pyramid wavefront sensor. II. Preliminary demonstration on the new CACTI testbed
Lauren Schatz, Johanan Codona, Joseph D. Long +17
The next generation of giant ground and space telescopes will have the light-collecting power to detect and characterize potentially habitable terrestrial exoplanets using high-con…
Adapting the pyramid wavefront sensor for pupil fragmentation of the ELT class telescopes
Nicolas Levraud, Vincent Chambouleyron, Olivier Fauvarque +8
The next generation of Extremely Large Telescope (24 to 39m diameter) will suffer from the so-called "pupil fragmentation" problem. Due to their pupil shape complexity (segmentatio…
The Three-Sided PyramidWavefront Sensor. I. Simulations and Analysis for Astronomical Adaptive Optics
Lauren Schatz, Jared R. Males, Carlos Correia +11
For ExAO instruments for the Giant Segmented Mirror Telescopes (GSMTs), alternative architectures of WFS are under consideration because there is a tradeoff between detector size,…
Variation on a Zernike wavefront sensor theme: optimal use of photons
Vincent Chambouleyron, Olivier Fauvarque, Jean-François Sauvage +6
The Zernike wavefront sensor (ZWFS) is a concept belonging to the wide class Fourier-filtering wavefront sensor (FFWFS). The ZWFS is known for its extremely high sensitivity while…
The focal-plane assisted pyramid wavefront sensor: enabling frame-by-frame optical gains tracking
Vincent Chambouleyron, Olivier Fauvarque, Jean-François Sauvage +2
With its high sensitivity, the Pyramid wavefront sensor (PyWFS) is becoming an advantageous sensor for astronomical adaptive optics (AO) systems. However, this sensor exhibits sign…
INGOT Wavefront Sensor: from the optical design to a preliminary laboratory test
Simone Di Filippo, Davide Greggio, Maria Bergomi +13
The Ingot wavefront sensor is a novel pupil-plane wavefront sensor, specifically designed to cope with the elongation typical of the extended nature of the Laser Guide Star (LGS).…
Pyramid wavefront sensor optical gains compensation using a convolutional model
Vincent Chambouleyron, Olivier Fauvarque, Pierre Janin-Potiron +5
Extremely Large Telescopes have overwhelmingly opted for the Pyramid wavefront sensor (PyWFS) over the more widely used Shack-Hartmann WaveFront Sensor (SHWFS) to perform their Sin…
Performance limits of adaptive-optics/high-contrast imagers with pyramid wave-front sensors
Carlos M. Correia, Olivier Fauvarque, Charlotte Z. Bond +3
Advanced AO systems will likely utilise Pyramid wave-front sensors (PWFS) over the traditional Shack-Hartmann sensor in the quest for increased sensitivity, peak performance and ul…
Adaptive optics with programmable Fourier-based wavefront sensors: a spatial light modulator approach to the LOOPS testbed
Pierre Janin-Potiron, Vincent Chambouleyron, Lauren Schatz +10
Wavefront sensors encode phase information of an incoming wavefront into an intensity pattern that can be measured on a camera. Several kinds of wavefront sensors (WFS) are used in…
Kernel formalism applied to Fourier based wave front sensing in presence of residual phases
Olivier Fauvarque, Pierre Janin-Potiron, Carlos Correia +5
In this paper, we describe Fourier-based Wave Front Sensors (WFS) as linear integral operators, characterized by their Kernel. In a first part, we derive the dependency of this qua…
Pair-based Analytical model for Segmented Telescopes Imaging from Space (PASTIS) for sensitivity analysis
Lucie Leboulleux, Jean-François Sauvage, Laurent Pueyo +6
The imaging and spectroscopy of habitable worlds will require large-aperture space-based telescopes, to increase the collecting area and the angular resolution. These large telesco…
General formalism for Fourier based Wave Front Sensing
Olivier Fauvarque, Benoit Neichel, Thierry Fusco +2
We introduce in this article a general formalism for Fourier based wave front sensing. To do so, we consider the filtering mask as a free parameter. Such an approach allows to unif…
General formalism for Fourier based Wave Front Sensing: application to the Pyramid wave front sensors
Olivier Fauvarque, Benoit Neichel, Thierry Fusco +2
In this article, we compare a set of Wave Front Sensors (WFS) based on Fourier filtering technique. In particular, this study explores the "class of pyramidal WFS" defined as the 4…
Variation around a Pyramid theme: optical recombination and optimal use of photons
O. Fauvarque, B. Neichel, T. Fusco +1
We propose a new type of Wave Front Sensor (WFS) derived from the Pyramid WFS (PWFS). This new WFS, called the Flattened Pyramid-WFS (FPWFS), has a reduced Pyramid angle in order t…
Enhanced Magnetic Compressibility and Isotropic Scale-Invariance at Sub-Ion Larmor Scales in Solar Wind Turbulence
Khurom H. Kiyani, Sandra C. Chapman, Fouad Sahraoui +3
The anisotropic nature of solar wind magnetic turbulence fluctuations is investigated scale-by-scale using high cadence in-situ magnetic field measurements from the Cluster and ACE…