59 citations · 235 across the 21 of their papers we have counts for
22 papers · 1 filter
Demonstration of simultaneous PIAA- coronagraphy and wavefront sensing using a single metasurface-based focal-plane optic
Dhwanil Patel, Sebastiaan Y. Haffert, Skyler Palatnick +23
Controlling residual wavefront aberrations downstream of an extreme adaptive optics (ExAO) system is a major challenge in high-contrast imaging. These aberrations produce quasi-sta…
Long-term performance of the MLR-TT sensor: two-photon polymerization validation in the telescope environment
Robert J. Harris, Philipp Hottinger, Jonathan Crass +2
We report on the long-term optical performance of a two-photon polmerized microlens ring tip-tilt sensor. The study is backed by repeated measurements over the last six years, sinc…
Millimetre-scale spectrographs for next-generation photonic instrumentation
Emily Ronson, Robert J. Harris, Ariadna Calcines Rosario +1
We present a set of ultra-compact spectrographs fabricated using two-photon polymerisation, each under 1 mm in length and printed directly onto an optical fiber. This fully integra…
HRMOS: A High-Resolution Multi-Object Spectrograph for the VLT
Laura Magrini, Thomas Bensby, Sofia Randich +174
This White Paper presents the scientific rationale and instrument concept for HRMOS (High-Resolution Multi-Object Spectrograph), a next-generation instrument proposed for the ESO V…
On-sky results for the novel integrated micro-lens ring tip-tilt sensor
Philipp Hottinger, Robert J. Harris, Jonathan Crass +16
We present the first on-sky results of the micro-lens ring tip-tilt (MLR-TT) sensor. This sensor utilizes a 3D printed micro-lens ring feeding six multi-mode fibers to sense misali…
3D-M3: High-spatial resolution spectroscopy with extreme AO and 3D printed micro-lenslets
Theodoros Anagnos, Mareike Trappen, Blaise C. Kuo Tiong +20
By combining IFS with ExAO we are now able to resolve objects close to the diffraction-limit of large telescopes, exploring new science cases. We introduce an IFU designed to coupl…
An innovative integral field unit upgrade with 3D-printed micro-lenses for the RHEA at Subaru
Theodoros Anagnos, Pascal Maier, Philipp Hottinger +26
In the new era of Extremely Large Telescopes (ELTs) currently under construction, challenging requirements drive spectrograph designs towards techniques that efficiently use a faci…
Diffraction-limited integral-field spectroscopy for extreme adaptive optics systems with the Multi-Core fiber-fed Integral-Field Unit
Sebastiaan Y. Haffert, Robert J. Harris, Alessio Zanutta +31
Direct imaging instruments have the spatial resolution to resolve exoplanets from their host star. This enables direct characterization of the exoplanets atmosphere, but most direc…
Astronomical Applications of Multi-Core Fiber Technology
Nemanja Jovanovic, Robert J. Harris, Nick Cvetojevic
Optical fibers have altered astronomical instrument design by allowing for a complex, often large instrument to be mounted in a remote and stable location with respect to the teles…
Focal Plane Tip-Tilt Sensing for Improved Single-Mode Fiber Coupling using a 3D-printed Microlens-Ring
Philipp Hottinger, Robert J. Harris, Philipp-Immanuel Dietrich +11
Modern extreme adaptive optics (AO) systems achieving diffraction-limited performance open up new possibilities for instrumentation. Especially important for the fields of spectros…
Enabling the next generation of scientific discoveries by embracing photonic technologies
Nemanja Jovanovic, Charles Beichman, Cullen Blake +46
The fields of Astronomy and Astrophysics are technology limited, where the advent and application of new technologies to astronomy usher in a flood of discoveries altering our unde…
The need for single-mode fiber-fed spectrographs
Jonathan Crass, Andrew Bechter, Eric Bechter +12
Precise Doppler radial-velocity (RV) instruments will continue to play an essential role in advancing our holistic understanding of exoplanetary systems. The combination of orbital…
Demonstration of a photonic lantern low order wavefront sensor using an adaptive optics testbed
Mark K. Corrigan, Timothy J. Morris, Robert J. Harris +1
We demonstrate the use of an optimized 5 core photonic lantern (PL) to simultaneously measure tip/tilt errors at the telescope focal plane, while also providing the input to an ins…
Micro-lens array as tip-tilt sensor for single-mode fiber coupling
Philipp Hottinger, Robert J. Harris, Philipp-Immanuel Dietrich +8
We introduce a design for a tip-tilt sensor with integrated single-mode fiber coupling for use with the front-end prototype of the iLocater spectrograph at the Large Binocular Tele…
Optimizing astrophotonic spatial reformatters using simulated on-sky performance
Theodoros Anagnos, Robert J. Harris, Mark K. Corrigan +7
One of the most useful techniques in astronomical instrumentation is image slicing. It enables a spectrograph to have a more compact angular slit, whilst retaining throughput and i…
NAIR: Novel Astronomical Instrumentation through photonic Reformatting
Robert J. Harris, Jan Tepper, John J. Davenport +11
The project "Novel Astronomical Instrumentation through photonic Reformatting" is a DFG-funded collaboration to exploit the recognized potential of photonics solutions for a radica…
Astronomical photonics in the context of infrared interferometry and high-resolution spectroscopy
Lucas Labadie, Jean-Philippe Berger, Nick Cvetojevic +9
We review the potential of Astrophotonics, a relatively young field at the interface between photonics and astronomical instrumentation, for spectro-interferometry. We review some…
Performance estimates for spectrographs using photonic reformatters
Robert. J. Harris, Lucas Labadie, Ulrike Lemke +4
Using a photonic reformatter to eliminate the effects of conventional modal noise could greatly improve the stability of a high resolution spectrograph. However the regimes where t…
Efficient photonic reformatting of celestial light for diffraction-limited spectroscopy
David G. MacLachlan, Robert J. Harris, Itandehui Gris-Sánchez +9
The spectral resolution of a dispersive astronomical spectrograph is limited by the trade-off between throughput and the width of the entrance slit. Photonic guided-wave transition…
Photonic spatial reformatting of stellar light for diffraction-limited spectroscopy
Robert J. Harris, David G. MacLachlan, Debaditya Choudhury +6
The spectral resolution of a dispersive spectrograph is dependent on the width of the entrance slit. This means that astronomical spectrographs trade-off throughput with spectral r…
Applications of Integrated Photonic Spectrographs in Astronomy
Robert James Harris, Jeremy Allington-Smith
One of the problems of producing instruments for Extremely Large Telescopes is that their size (and hence cost) scales rapidly with telescope aperture. To try to break this relatio…
Modelling the application of integrated photonic spectrographs to astronomy
R. J. Harris, J. R. Allington-Smith
One of the well-known problems of producing instruments for Extremely Large Telescopes is that their size (and hence cost) scales rapidly with telescope aperture. To try to break t…