Dr. Christopher H. Betters Profile

Dr. Christopher H. Betters

Research Fellow at Univ of Sydney

SPIE Involvement:

Author

Publications (38)

Proceedings Article | 21 December 2024 Paper

Atmospheric remote sensing of methane with RedEye-1: a low-cost hyperspectral SWIR imager

Naif Alsalem, Christopher Betters, Savannah McGuirk, Iver Cairns, Sergio Leon-Saval

Proceedings Volume 13266, 1326608 (2024) https://doi.org/10.1117/12.3034690

KEYWORDS: Short wave infrared radiation, Imaging systems, Methane, Hyperspectral imaging, Remote sensing, Atmospheric sensing, Signal to noise ratio, Atmospheric optics, Spectral resolution, Mining

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SPIE Journal Paper | 21 November 2024

Spectral characterization of a three-port photonic lantern for application to spectroastrometry

Yoo Jung Kim, Michael P. Fitzgerald, Jonathan Lin, Julien Lozi, Sébastien Vievard, Yinzi Xin, Daniel Levinstein, Nemanja Jovanovic, Sergio Leon-Saval, Christopher Betters, Olivier Guyon, Barnaby Norris, Steph Sallum

JATIS, Vol. 10, Issue 04, 045004, (November 2024) https://doi.org/10.1117/12.10.1117/1.JATIS.10.4.045004

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SPIE Journal Paper | 7 October 2024

Demonstration of a photonic lantern focal-plane wavefront sensor: measurement of atmospheric wavefront error modes and low wind effect in the nonlinear regime

Jin Wei, Barnaby Norris, Christopher Betters, Sergio Leon-Saval

JATIS, Vol. 10, Issue 04, 049001, (October 2024) https://doi.org/10.1117/12.10.1117/1.JATIS.10.4.049001

KEYWORDS: Wavefront sensors, Wavefronts, Adaptive optics, Wavefront errors, Wavefront aberrations, Spatial light modulators, Multicore fiber, Education and training, Telescopes, Single mode fibers

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Proceedings Article | 16 September 2024 Poster + Paper

Identifying embedded accreting protoplanets at and within the diffraction limit using photonic lantern spectro-astrometry

Daniel Levinstein, Stephanie Sallum, Yoo Jung Kim, Jonathan Lin, Nemanja Jovanovic, Michael Fitzgerald, Yinzi Xin, Olivier Guyon, Barnaby Norris, Christopher Betters, Sergio Leon-Saval, Vincent Deo, Julien Lozi, Sébastien Vievard, Kyohoon Ahn

Proceedings Volume 13095, 130952M (2024) https://doi.org/10.1117/12.3019296

KEYWORDS: Planets, Stars, Monte Carlo methods, Diffraction limit, Protactinium, Adaptive optics, Observational astronomy, Telescopes, Electric fields, Solar system

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Proceedings Article | 28 August 2024 Presentation + Paper

Spectral characterization of 3-port photonic lantern for spectroastrometry

Yoo Jung Kim, Michael Fitzgerald, Jonathan Lin, Julien Lozi, Sebastien Vievard, Nemanja Jovanovic, Sergio Leon-Saval, Kyohoon Ahn, Christopher Betters, Vincent Deo, Pradip Gatkine, Olivier Guyon, Manon Lallement, Daniel Levinstein, Dimitri Mawet, Barnaby Norris, Steph Sallum, Yinzi Xin

Proceedings Volume 13095, 130950T (2024) https://doi.org/10.1117/12.3019017

KEYWORDS: Photonics, High angular resolution imaging, Astronomical spectroscopy, Optical fibers, Single mode fibers, Telescopes, Spectral response, Spatial resolution, Calibration, Analytic models, Spectral resolution, Point spread functions, Turbulence

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Proceedings Article | 28 August 2024 Presentation

Wavefront control with spectrally dispersed photonic lanterns

Jonathan Lin, Michael Fitzgerald, Yoo Jung Kim, Daniel Levinstein, Yinzi Xin, Kyohoon Ahn, Christopher Betters, Vincent Deo, Olivier Guyon, Sergio Leon-Saval, Julien Lozi, Sébastien Vievard, Steph Sallum, Nemanja Jovanovic

Proceedings Volume 13097, 130971D (2024) https://doi.org/10.1117/12.3019308

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Proceedings Article | 27 August 2024 Presentation + Paper

The photonic lantern wavefront sensor and imager: focal plane wavefront sensing and optimal imaging at the diffraction limit and beyond

Barnaby R. Norris, Sergio Leon-Saval, Jin Wei, Christopher Betters, Adam Taras, Jonathan Lin, Yinzi Xin, Yoo Jung Kim, Michael Fitzgerald, Steph Sallum, Aditya Sengupta, Pradip Gatkine, Nemanja Jovanovic, Dimitri Mawet, Julien Lozi, Sebastian Vievard, Vincent Deo, Manon Lallement, Daniel Levinstein, Olivier Guyon

Proceedings Volume 13097, 130971I (2024) https://doi.org/10.1117/12.3019643

KEYWORDS: Wavefront sensors, Single mode fibers, Reconstruction algorithms, Point spread functions, Wavefront reconstruction, Telescopes, Wavefronts, Image restoration, Diffraction limit, Adaptive optics

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Proceedings Article | 26 August 2024 Presentation + Paper

Strategies to mitigate effects of pointing error for the TOLIMAN space telescope

Max Charles, Connor Langford, Louis Desdoigts, Fred Crous, Clarissa Luk, Christopher Betters, Benjamin Pope, Peter Tuthill

Proceedings Volume 13100, 1310017 (2024) https://doi.org/10.1117/12.3019548

KEYWORDS: Motion models, Telescopes, Space telescopes, Convolution, Binary data, Error analysis, Data modeling, Covariance matrices, Vibration

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Proceedings Article | 26 August 2024 Presentation + Paper

Manufacturing a novel diffractive pupil for the astrometric detection of exoplanets

Connor Langford, David Doelman, Christopher Betters, Max Charles, Fred Crous, Louis Desdoigts, Tatsuya Hirai, Tomokazu Ishiguro, Clarissa Luk, Yuuki Nishie, Frans Snik, Peter Tuthill

Proceedings Volume 13100, 131001R (2024) https://doi.org/10.1117/12.3019202

KEYWORDS: Optics manufacturing, Design, Manufacturing, Astrometry, Telescopes, Liquid crystals, Zerodur, Exoplanets, Binary stars, Bandpass filters

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Proceedings Article | 23 August 2024 Presentation + Paper

Getting to know the neighbours: Earth analogues in Alpha Centauri with the TOLIMAN space telescope

Peter Tuthill, Christopher Betters, Max Charles, Fred Crous, Conaire Deagan, Louis Desdoigts, David Doelman, Mark George, Kyran Grattan, Olivier Guyon, Thomas Holland, Peter Klupar, Connor Langford, Kieran Larkin, Clarissa Luk, Ben Montet, Jack Nelson, Benjamin Pope, Grace Piroscia, Frans Snik, Adam Taras, Alison Wong, Simon Worden

Proceedings Volume 13092, 130920C (2024) https://doi.org/10.1117/12.3019256

KEYWORDS: Planets, Stars, Space telescopes, Sun, Space operations, Physics, Binary stars, Astrometry, Silicon carbide, Optics manufacturing

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Proceedings Article | 18 July 2024 Presentation + Paper

Visible photonic lantern integration, characterization, and on-sky testing on Subaru/SCExAO

S. Vievard, M. Lallement, S. Leon-Saval, O. Guyon, N. Jovanovic, E. Huby, S. Lacour, J. Lozi, V. Deo, K. Ahn, M. Lucas, T. Currie, S. Sallum, M. Fitzgerald, C. Betters, B. Norris, R. Amezcua-Correa, S. Yerolatsitis, J. Lin, Y. Kim, P. Gatkine, T. Kotani, M. Tamura, G. Martin, H. Kenchington Goldsmith, G. Perrin

Proceedings Volume 13096, 130960P (2024) https://doi.org/10.1117/12.3018031

KEYWORDS: Single mode fibers, Telescopes, Visible radiation, Spectroscopes, Spectrographs, Calibration, Equipment, Spatial resolution, Imaging spectroscopy, Adaptive optics

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Proceedings Article | 18 July 2024 Presentation + Paper

Fiber-fed high-resolution infrared spectroscopy at the diffraction limit with Keck-HISPEC and TMT-MODHIS: status update

Dimitri Mawet, Michael Fitzgerald, Quinn Konopacky, Nemanja Jovanovic, Ashley Baker, David Andersen, Etienne Artigau, John Bailey, Charles Beichman, Björn Benneke, Rob Bertz, Christopher Betters, David Brearly, Aaron Brown, James Brugger, Richard Dekany, Jocelyn Ferrara, Alberto Franco, Jason Fucik, Rose Gibson, Tim Greffe, Samuel Halverson, Christopher Johnson, Marc Kassis, Takayuki Kotani, Yoo Jung Kim, Stephanie Leifer, Sergio Leon-Saval, Jonathan Lin, Larry Lingvay, Jerome Maire, Eduardo Marin, Kenneth Magnone, Don Neill, Rishi Pahuja, Garreth Ruane, Greg Sercel, Svarun Soda, Ji Man Sohn, Jonathan Steiner, Motohide Tamura, Jim Thorne, Eric Wang, Truman Wold, Ray Zarzaca

Proceedings Volume 13096, 130960W (2024) https://doi.org/10.1117/12.3019238

KEYWORDS: Spectrographs, Exoplanets, Equipment, Design, Planets, Spectral resolution, Single mode fibers, Infrared spectroscopy, Adaptive optics, Telescopes

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Proceedings Article | 18 July 2024 Poster + Paper

Overview and status of the fiber delivery subsystem (FIB) of Keck/HISPEC, the diffraction-limited y-K band spectrograph for exoplanet characterization

Nemanja Jovanovic, Greg Sercel, Takayuki Kotani, John Bailey, Ashley Baker, Svarun Soda, Aoi Takahashi, Jonathan Lin, Yoo Jung Kim, Michael Fitzgerald, Sebastien Vievard, Chris Betters, Sergio Leon-Saval, Jocelyn Ferrara, Truman Wold, Jonathan Steiner, Jim Thorne, Marc Kassis, Motohide Tamura, Dimitri Mawet

Proceedings Volume 13096, 130966I (2024) https://doi.org/10.1117/12.3020499

KEYWORDS: Single mode fibers, Switches, Switching, Calibration, Microelectromechanical systems, Optical switching, Spectrographs

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Proceedings Article | 18 December 2023 Paper

Aperiodic multi-notch FBG filters for astronomical positronium detection

Qingshan Yu, Liguo Luo, Göran Edvell, Christopher Betters, Jin Wei, Simon Ellis, Joss Bland-Hawthorn, Sergio Leon-Saval

Proceedings Volume 12965, 129650D (2023) https://doi.org/10.1117/12.3008044

KEYWORDS: Fiber Bragg gratings, Tunable filters, Design and modelling, Astronomy, Spectrographs, Bragg wavelengths, Optical filters, Modulation

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Proceedings Article | 6 October 2023 Presentation

Demonstration of linear and neural net closed-loop control with a photonic lantern focal-plane wavefront sensor

Jonathan Lin, Barnaby Norris, Olivier Guyon, Michael Fitzgerald, Yinzi Xin, Yoo Jung Kim, Sébastien Vievard, Julien Lozi, Sergio Leon-Saval, Christopher Betters, Steph Sallum, Pradip Gatkine, Dimitri Mawet, Nemanja Jovanovic

Proceedings Volume 12680, 126800L (2023) https://doi.org/10.1117/12.2677057

KEYWORDS: Wavefront sensors, Wavefront aberrations, Pupil aberrations, Adaptive optics, Neural networks, Equipment, Wavefront errors, Waveguides, Wavefront reconstruction, Telescopes

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Proceedings Article | 5 October 2023 Paper

Exploring the potential of coherent imaging using photonic lanterns with beam combiners

Yoo Jung Kim, Michael Fitzgerald, Jonathan Lin, Steph Sallum, Yinzi Xin, Nemanja Jovanovic, Sergio Leon-Saval, Christopher Betters, Pradip Gatkine, Olivier Guyon, Julien Lozi, Dimitri Mawet, Barnaby Norris, Sebastien Vievard

Proceedings Volume 12680, 126800K (2023) https://doi.org/10.1117/12.2677054

KEYWORDS: Visibility, Single mode fibers, Interferometry, Beam combiners, Telescopes, Image restoration, Stellar interferometry, Coherence imaging

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Proceedings Article | 5 October 2023 Presentation + Paper

Photonic spectro-interferometry with SCExAO/FIRST at the Subaru Telescope: towards Hα imaging of protoplanets

S. Vievard, M. Lallement, E. Huby, S. Lacour, O. Guyon, N. Jovanovic, S. Leon-Saval, J. Lozi, V. Deo, K. Ahn, N. Cvetojevic, K. Barjot, G. Martin, H. D. Kenchington-Goldsmith, G. Duchêne, T. Kotani, F. Marchis, D. Rouan, M. Fitzgerald, S. Sallum, B. Norris, C. Betters, P. Gatkine, J. Lin, Y. J. Kim, C. Pham, C. Cassagnettes, A. Billat, M. Tamura, G. Perrin

Proceedings Volume 12680, 126800H (2023) https://doi.org/10.1117/12.2676319

KEYWORDS: Telescopes, Single mode fibers, Optical path differences, Spectrographs, Photonic integrated circuits, Polarization, Microelectromechanical systems, Calibration, Visible radiation

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Proceedings Article | 5 October 2023 Presentation + Paper

The path to detecting extraterrestrial life with astrophotonics

Nemanja Jovanovic, Yinzi Xin, Michael Fitzgerald, Olivier Guyon, Peter Tuthill, Barnaby Norris, Pradip Gatkine, Greg Sercel, Svarun Soda, Yoo Jung Kim, Jonathan Lin, Sergio Leon-Saval, Rodrigo Amezcua-Correa, Stephanos Yerolatsitis, Julien Lozi, Sébastien Vievard, Chris Betters, Steph Sallum, Daniel Levinstein, Dimitri Mawet, Jeffrey Jewell, J. Kent Wallace, Nick Cvetojevic

Proceedings Volume 12680, 126800G (2023) https://doi.org/10.1117/12.2677951

KEYWORDS: Planets, Photonics, Stars, Exoplanets, Equipment, Astrophotonics, Wavefront sensors, Single mode fibers, Coronagraphy, Spectroscopy

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Proceedings Article | 30 August 2022 Presentation + Paper

Demonstration of a photonic-lantern focal-plane wavefront sensor using fiber mode conversion and deep learning

Barnaby R. Norris, Jin Wei, Christopher Betters, Sergio Leon-Saval, Yinzi Xin, Jonathan Lin, Yoo Jung Kim, Steph Sallum, Julien Lozi, Sebastien Vievard, Olivier Guyon, Pradip Gatkine, Nemanja Jovanovic, Dimitri Mawet, Michael Fitzgerald

Proceedings Volume 12185, 1218530 (2022) https://doi.org/10.1117/12.2629852

KEYWORDS: Wavefronts, Wavefront sensors, Adaptive optics, Point spread functions, Photodetectors, Phase measurement, Multimode fibers, Telescopes, Fiber optics sensors, Astronomy

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Proceedings Article | 30 August 2022 Presentation + Paper

Exoplanet detection with photonic lanterns for focal-plane wavefront sensing and control

Jonathan Lin, Yinzi Xin, Barnaby Norris, Yoo Jung Kim, Steph Sallum, Christopher Betters, Sergio Leon-Saval, Julien Lozi, Sebastian Vievard, Oliver Guyon, Pradip Gatkine, Nemanja Jovanovic, Dimitri Mawet, Michael Fitzgerald

Proceedings Volume 12185, 121852G (2022) https://doi.org/10.1117/12.2630692

KEYWORDS: Wavefront sensors, Wavefronts, Single mode fibers, Mathematical modeling, Telescopes, Photodetectors, Wavefront reconstruction, Wavefront aberrations, Monochromatic aberrations, Exoplanets

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Proceedings Article | 29 August 2022 Presentation + Paper

Experimental measurements of AO-fed photonic lantern coupling efficiencies

Jonathan Lin, Sebastian Vievard, Nemanja Jovanovic, Barnaby Norris, Michael P. Fitzgerald, Christopher Betters, Pradip Gatkine, Olivier Guyon, Yoo Jung Kim, Sergio Leon-Saval, Julien Lozi, Dimitri Mawet, Steph Sallum, Yinzi Xin

Proceedings Volume 12188, 121882E (2022) https://doi.org/10.1117/12.2630608

KEYWORDS: Single mode fibers, Point spread functions, Telescopes, Power meters, Physics, Device simulation, Spectrographs, Near infrared, Turbulence, Sensors

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Proceedings Article | 29 August 2022 Poster + Paper

Spectroastrometry with photonic lanterns

Yoo Jung Kim, Stephanie Sallum, Jonathan Lin, Yinzi Xin, Barnaby Norris, Christopher Betters, Sergio Leon-Saval, Julien Lozi, Sebastian Vievard, Pradip Gatkine, Olivier Guyon, Nemanja Jovanovic, Dimitri Mawet, Michael Fitzgerald

Proceedings Volume 12184, 1218449 (2022) https://doi.org/10.1117/12.2630635

KEYWORDS: Binary data, Single mode fibers, Planets, Monochromatic aberrations, Wavefronts, Telescopes, Spectroscopy, Photodetectors, Photonics, Astronomical spectroscopy, Astronomical detectors, Waveguides

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SPIE Journal Paper | 29 June 2021

Learning the lantern: neural network applications to broadband photonic lantern modeling

David Sweeney, Barnaby R. Norris, Peter Tuthill, Richard Scalzo, Jin Wei, Christopher Betters, Sergio Leon-Saval

JATIS, Vol. 7, Issue 02, 028007, (June 2021) https://doi.org/10.1117/12.10.1117/1.JATIS.7.2.028007

KEYWORDS: Waveguides, Data modeling, Wavefronts, Neural networks, Lithium, Zernike polynomials, Broadband telecommunications, Single mode fibers, Beam propagation method, Telescopes

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Proceedings Article | 11 June 2021 Open Access

CUAVA InGaAs-based, Short Wavelength InfraRed (SWIR) instrument for atmospheric reconnaissance: preliminary design

Naif Alsalem, Christopher Betters, Sergio Leon-Saval, Iver Cairns

Proceedings Volume 11852, 118526A (2021) https://doi.org/10.1117/12.2600239

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Proceedings Article | 13 December 2020 Presentation

The TOLIMAN space telescope: discovering exoplanets in the solar neighbourhood

Peter Tuthill, Louis Desdoigts, Christopher Betters, Barnaby Norris, Iver Cairns, Sergio Leon-Saval

Proceedings Volume 11446, 1144612 (2020) https://doi.org/10.1117/12.2563081

KEYWORDS: Space telescopes, Environmental sensing, Target detection, Telescopes, Eye

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Proceedings Article | 13 December 2020 Presentation + Paper

An innovative integral field unit upgrade with 3D-printed micro-lenses for the RHEA at Subaru

Theodoros Anagnos, Pascal Maier, Philipp Hottinger, Christopher Betters, Tobias Feger, Sergio Leon-Saval, Itandehui Gris-Sánchez, Stephanos Yerolatsitis, Julien Lozi, Tim Birks, Sébastien Vievard, Nemanja Jovanovic, Adam Rains, Michael Ireland, Robert Harris, Blaise Kuo Tiong, Olivier Guyon, Barnaby Norris, Sebastiaan Haffert, Matthias Blaicher, Yulin Xu, Moritz Straub, Jörg-Uwe Pott, Oliver Sawodny, Philip Neureuther, David Coutts, Christian Schwab, Christian Koos, Andreas Quirrenbach

Proceedings Volume 11451, 114516Y (2020) https://doi.org/10.1117/12.2560626

KEYWORDS: Spectrographs, Adaptive optics, Free space optics, Large telescopes, Optical instrument design, Diffraction, Spectral resolution, Free space, Lenses, Exoplanets

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Proceedings Article | 2 March 2020 Presentation + Paper

Measurements of few-mode fiber photonic lanterns in emulated atmospheric conditions for a low earth orbit space to ground optical communication receiver application

Sarah Tedder, Bertram Floyd, Yousef Chahine, Benjamin Croop, Brian Vyhnalek, Christopher Betters, Sergio Leon-Saval

Proceedings Volume 11272, 112720U (2020) https://doi.org/10.1117/12.2542848

KEYWORDS: Single mode fibers, Atmospheric propagation, Sensors, Receivers, Turbulence, Atmospheric modeling, Atmospheric optics, Telescopes, Earth's atmosphere

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Proceedings Article | 4 March 2019 Presentation + Paper

Single-mode fiber and few-mode fiber photonic lanterns performance evaluated for use in a scalable real-time photon counting ground receiver

Sarah Tedder, Brian Vyhnalek, Sergio Leon-Saval, Christopher Betters, Bert Floyd, Jeremy Staffa, Robert Lafon

Proceedings Volume 10910, 109100G (2019) https://doi.org/10.1117/12.2507478

KEYWORDS: Single mode fibers, Receivers, Sensors, Telescopes, Digital micromirror devices, Fiber couplers, Spatial light modulators, Dispersion, Photon counting, Commercial off the shelf technology, Free space optical communications

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Photonic lanterns provide an efficient way of coupling light from a single large-core fiber to multiple small-core fibers. This capability is of interest for space to ground communication applications. In these applications, the optical ground receivers require high-efficiency coupling from an atmospherically distorted focus spot to multiple fiber coupled single pixel super-conducting nanowire detectors. This paper will explore the use of photonic lanterns in a real-time ground receiver that is scalable and constructed with commercial parts. The number of small-core fibers (i.e. an array of single or few-mode cores) that make a photonic lantern determines the number of spatial modes that they couple at the larger multimode fiber core end. For instance, lanterns made with n number of single-mode fibers can couple n number of spatial modes. Although the laser transmitted from a spacecraft originates as a Gaussian shape, the atmosphere distorts the beam profile by scrambling the phase and scattering energy into higher-order spatial modes. Therefore, if a ground receiver is sized for a target data rate with n number of detectors, the corresponding lantern made with single-mode fibers will couple n number of spatial modes. Most of the energy of the transmitted beam scattered into spatial modes higher than n will be lost. This paper shows this loss may be reduced by making lanterns with few-mode fibers instead of single-mode fibers, increasing the number of spatial modes that can be coupled and therefore increasing the coupling efficiency to single pixel, single photon detectors. The free space to fiber coupling efficiency of these two types of photonic lanterns are compared over a range of the free-space coupling numerical apertures and mode field diameters. Results indicate the few mode fiber lantern has higher coupling efficiency for telescopes with longer focal lengths under higher turbulent conditions. Also presented is analysis of the jitter added to the system by the lanterns, showing the few-mode fiber photonic lantern adds more jitter than the single-mode fiber lantern, but less than a multimode fiber.

Proceedings Article | 4 August 2016 Paper

Precision radial velocities with inexpensive compact spectrographs

Christopher Betters, Alex Murray, Joss Bland-Hawthorn, Sergio Leon-Saval

Proceedings Volume 9908, 99081B (2016) https://doi.org/10.1117/12.2232126

KEYWORDS: Spectrographs, Calibration, Spectral resolution, Single mode fibers, Astronomy, Visible radiation, Sensors, Charge-coupled devices, Diffraction, Telescopes

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Proceedings Article | 3 August 2016 Paper

Efficiently feeding single-mode fiber photonic spectrographs with an extreme adaptive optics system: on-sky characterization and preliminary spectroscopy

N. Jovanovic, N. Cvetojevic, C. Schwab, B. Norris, J. Lozi, S. Gross, C. Betters, G. Singh, O. Guyon, F. Martinache, D. Doughty, P. Tuthill

Proceedings Volume 9908, 99080R (2016) https://doi.org/10.1117/12.2234299

KEYWORDS: Spectrographs, Adaptive optics, Single mode fibers, Apodization, Wavefronts, Telescopes, Calibration, Cameras, Point spread functions, Imaging spectroscopy

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Proceedings Article | 22 July 2016 Paper

Low cost photonic comb for sub-m/s wavelength calibration

Christopher Betters, Maxime Hermouet, Thomas Blanc, James Colless, Joss Bland-Hawthorn, Janez Kos, Sergio Leon-Saval

Proceedings Volume 9912, 99126Y (2016) https://doi.org/10.1117/12.2233678

KEYWORDS: Fabry–Perot interferometers, Rubidium, Calibration, Spectrographs, Single mode fibers, Velocity measurements, Optical fibers, Switches, Lamps, Absorption

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Proceedings Article | 28 July 2014 Paper

The problem of scattering in fibre-fed VPH spectrographs and possible solutions

S. Ellis, Will Saunders, Chris Betters, Scott Croom

Proceedings Volume 9151, 91511V (2014) https://doi.org/10.1117/12.2057108

KEYWORDS: Scattering, Point spread functions, Spectrographs, Light scattering, Telescopes, Fourier transforms, Fiber Bragg gratings, Surface roughness, Electroluminescent displays, Apodization

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Proceedings Article | 8 July 2014 Paper

PIMMS échelle: the next generation of compact diffraction limited spectrographs for arbitrary input beams

Christopher Betters, Sergio Leon-Saval, Joss Bland-Hawthorn, Samuel Richards, Tim Birks, Itandehui Gris-Sánchez

Proceedings Volume 9147, 91471I (2014) https://doi.org/10.1117/12.2055638

KEYWORDS: Spectrographs, Spectral resolution, Sensors, Photonics, Telescopes, Visible radiation, Cameras, Astrophotonics, Optical simulations, Optical design

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Proceedings Article | 24 September 2012 Paper

Demonstration and design of a compact diffraction limited spectrograph

Christopher Betters, Sergio Leon-Saval, Joss Bland-Hawthorn, Gordon Robertson

Proceedings Volume 8446, 84463H (2012) https://doi.org/10.1117/12.925824

KEYWORDS: Spectrographs, Spectral resolution, Collimators, Sensors, Single mode fibers, Cameras, Gaussian beams, Photonics, Point spread functions, Optical simulations

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Proceedings Article | 21 September 2012 Paper

NanoSpec: a diffraction limited micro-spectrograph for pico- and nano-satellites

Christopher Betters, S. Leon-Saval, J. Bland-Hawthorn

Proceedings Volume 8442, 84424B (2012) https://doi.org/10.1117/12.925819

KEYWORDS: Spectrographs, Satellites, Sensors, Particles, Charged particle optics, Single mode fibers, Spectral resolution, Diffraction, Collimators, Refractive index

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Proceedings Article | 21 September 2012 Paper

The i-INSPIRE satellite: a university pico-satellite project

Lisa Fogarty, Size Xiao, Jiro Funamoto, Iver Cairns, Joss Bland-Hawthorn, Xiaofeng Wu, Christopher Betters, Sergio Leon-Saval, Anthony Monger

Proceedings Volume 8442, 84421B (2012) https://doi.org/10.1117/12.925709

KEYWORDS: Satellites, Cameras, Space operations, Satellite communications, Photography, Spectrographs, Aerospace engineering, Satellite imaging, Data communications, Transceivers

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Proceedings Article | 13 September 2012 Paper

The Photonic TIGER: a multicore fiber-fed spectrograph

Sergio Leon-Saval, Christopher Betters, Joss Bland-Hawthorn

Proceedings Volume 8450, 84501K (2012) https://doi.org/10.1117/12.925254

KEYWORDS: Spectrographs, Sensors, Diffraction, Single mode fibers, Telescopes, Dispersion, Astronomy, Adaptive optics, Laser sources, Iterated function systems

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Proceedings Article | 15 July 2010 Paper

PIMMS: photonic integrated multimode microspectrograph

Joss Bland-Hawthorn, Jon Lawrence, Gordon Robertson, Sam Campbell, Ben Pope, Chris Betters, Sergio Leon-Saval, Tim Birks, Roger Haynes, Nick Cvetojevic, Nem Jovanovic

Proceedings Volume 7735, 77350N (2010) https://doi.org/10.1117/12.856347

KEYWORDS: Spectrographs, Waveguides, Single mode fibers, Sensors, Telescopes, Spectroscopes, Electrons, Photonic devices, Diffraction, Spectral resolution

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