Dr. Shaojie Chen Profile

Dr. Shaojie Chen

Senior Research Associate at Dunlap Institute for Astronomy & Astrophysics

SPIE Involvement:

Author

Publications (22)

Proceedings Article | 30 August 2022 Poster + Paper

Poster + Paper

Status update for MAPS, the MMT AO exoPlanet characterization System

Manny Montoya, Katie Morzinski, Olivier Durney, Andrew Gardner, Emily Mailhot, Dan Vargas, Amali Vaz, Grant West, Jenny Patience, Buell Jannuzi, Narsireddy Anugu, Jared Carlson, Kim Chapman, Shaojie Chen, Chuck Fellows, Lori Harrison, Terry Jones, Craig Kulesa, Masen Lamb, Siqi Liu, Don McCarthy, Suresh Sivanandam, Jacob Taylor

Proceedings Volume 12185, 121856S (2022) https://doi.org/10.1117/12.2619434

KEYWORDS: Cameras, Adaptive optics, Wavefront sensors, Imaging systems, Mirrors, Exoplanets, Telescopes, Infrared imaging, Calibration, Software development

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Proceedings Article | 30 August 2022 Poster + Paper

Poster + Paper

A near-infrared pyramid wavefront sensor for the MMT

Jacob Taylor, Suresh Sivanandam, Narsireddy Anugu, Adam Butko, Shaojie Chen, Olivier Durney, Tim Hardy, Masen Lamb, Manny Montoya, Katie Morzinski, Robin Swanson

Proceedings Volume 12185, 121856R (2022) https://doi.org/10.1117/12.2629419

KEYWORDS: Adaptive optics, Wavefront sensors, Calibration, Sensors, Near infrared, Cameras, Point spread functions, Observatories, Modulation

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Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

Optical design and wavelength calibration of a DMD-based multi-object spectrograph

Shaojie Chen, Matthew C. H. Leung, Xuefeng Yao, Suresh Sivanandam, Isabelle Sanders, Rosalind Liang

Proceedings Volume 12188, 1218856 (2022) https://doi.org/10.1117/12.2630372

KEYWORDS: Astronomical spectroscopy, Optical spectroscopy, Spectroscopy, Spectral calibration, Observational astronomy, Digital micromirror devices, Micromirrors, Sensors, Spectrographs, Telescopes, Optical design, Calibration, Astronomical imaging, Optical instrument design

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Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

Accurately measuring hyperspectral imaging distortion in grating spectrographs using a clustering algorithm

Matthew C. H. Leung, Shaojie Chen, Colby Jurgenson

Proceedings Volume 12188, 121883W (2022) https://doi.org/10.1117/12.2630442

KEYWORDS: Digital micromirror devices, Micromirrors, Spectrographs, Distortion, Sensors, Calibration, Hyperspectral imaging, Mercury, Spectral calibration, Hyperspectral systems, Diffraction gratings, Astronomical spectroscopy, Spectroscopy, Algorithms

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Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

GIRMOS image slicer: preliminary optical design

Tristan Chabot, Denis Brousseau, Hugues Auger, Shaojie Chen, Suresh Sivanandam, Simon Thibault

Proceedings Volume 12184, 121845K (2022) https://doi.org/10.1117/12.2628828

KEYWORDS: Spectrographs, Stray light, Optics manufacturing, Diamond turning, Optical design

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Proceedings Article | 29 August 2022 Presentation + Paper

Presentation + Paper

Detailed performance of the preliminary optical design of the Gemini multi-object infrared integral-field spectrograph

Shaojie Chen, Tristan Chabot, Olivier Lardière, Denis Brousseau, Suresh Sivanandam, Simon Thibault, Jenny Atwood, Joschua Hellemeier, Paul Hickson, Scott Chapman, Saugata Dutt, Masen Lamb, Scott Christie, Mark Barnet, Martin Tschimmel, Patrick Nkwari, Gaetano Sivo

Proceedings Volume 12184, 121840E (2022) https://doi.org/10.1117/12.2629027

KEYWORDS: Spectrographs, Iterated function systems, Image quality, Spectral resolution, Adaptive optics, Mirrors, Diffraction, Optical design, Laser imaging, Sensors

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Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

Design and development of a high-speed visible pyramid wavefront sensor for the MMT AO system

Narsireddy Anugu, Olivier Durney, Katie Morzinski, Phil Hinz, Suresh Sivanandam, Jared Males, Andrew Gardner, Chuck Fellows, Manny Montoya, Grant West, Amali Vaz, Emily Mailhot, Jared Carlson, Shaojie Chen, Masen Lamb, Adam Butko, Elwood Downey, Jacob Tyler, Buell Jannuzi

Proceedings Volume 11448, 114485J (2020) https://doi.org/10.1117/12.2576353

KEYWORDS: Cameras, Wavefront sensors, Adaptive optics, Modulation, Mirrors, Exoplanets, Interfaces, Target acquisition, Stars

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Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

Gemini Infrared Multi-Object Spectrograph: preliminary design overview

Suresh Sivanandam, Scott Chapman, Darren Erickson, Paul Hickson, Simon Thibault, Marcin Sawicki, Adam Muzzin, Jennifer Dunn, Alison Peck, Scott Roberts, Kim Venn, Gaetano Sivo, Martin Tschimmel, David Henderson, Masen Lamb, Shaojie Chen, Saugata Dutt, Olivier Lardière, André Anthony, Alexis Hill, Denis Brousseau, Tristan Chabot

Proceedings Volume 11447, 114471A (2020) https://doi.org/10.1117/12.2561607

KEYWORDS: Spectrographs, Astronomical imaging, Gemini Observatory, Infrared imaging, Infrared spectroscopy, Infrared radiation, Adaptive optics, Imaging systems, Spatial resolution, Spectral resolution

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Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

Preliminary mechanical design of the Gemini Infrared Multi-Object Spectrograph (GIRMOS) Cryostat

Saugata Dutt, Darren Erickson, Suresh Sivanandam, Shaojie Chen, Denis Brousseau, Tristan Chabot, Simon Thibault, Simon Paquin, Jean-Thomas Landry

Proceedings Volume 11447, 114476Q (2020) https://doi.org/10.1117/12.2563096

KEYWORDS: Spectrographs, Mechanical engineering, Astronomical imaging, Adaptive optics, Infrared spectroscopy, Infrared radiation, Imaging systems, Optical calibration, Multiplexing, Mirrors

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Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

Gemini IRMOS: preliminary optical design of a multi-object adaptive optics-fed infrared integral-field spectrograph

Shaojie Chen, Denis Brousseau, Olivier Lardière, Suresh Sivanandam, Simon Thibault, Tristan Chabot, Scott Chapman, Darren Erickson, Saugata Dutt, Gaetano Sivo

Proceedings Volume 11447, 114471B (2020) https://doi.org/10.1117/12.2561942

KEYWORDS: Gemini Observatory, Infrared telescopes, Adaptive optics, Optical design, Astronomical imaging, Infrared radiation, Infrared spectroscopy, Spectrographs, Telescopes, Multiplexing

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Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

Development and status of MAPS, the MMT AO exoPlanet characterization system

Katie Morzinski, Manny Montoya, Chuck Fellows, Olivier Durney, John Ford, Grant West, Andrew Gardner, Amali Vaz, Narsireddy Anugu, Emily Mailhot, Jared Carlson, Lori Harrison, Frank Gacon, Elwood Downey, Phil Hinz, Terry Jones, Jenny Patience, Suresh Sivanandam, Shaojie Chen, Masen Lamb, Adam Butko, Siqi Liu, Tim Hardy, Buell Jannuzi

Proceedings Volume 11448, 114481L (2020) https://doi.org/10.1117/12.2563178

KEYWORDS: Adaptive optics, Exoplanets, Electronics, Wavefront sensors, Cameras, Polarization, Actuators, Stars, Mirrors, Near infrared spectroscopy

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Proceedings Article | 10 July 2018 Presentation + Paper

Presentation + Paper

Gemini infrared multi-object spectrograph: instrument overview

Suresh Sivanandam, Scott Chapman, Luc Simard, Paul Hickson, Kim Venn, Simon Thibault, Marcin Sawicki, Adam Muzzin, Darren Erickson, Roberto Abraham, Masayuki Akiyama, David Andersen, Colin Bradley, Raymond Carlberg, Shaojie Chen, Carlos Correia, Tim Davidge, Sara Ellison, Kamal El-Sankary, Gregory Fahlman, Masen Lamb, Olivier Lardière, Marie Lemoine-Busserolle, Dae-Sik Moon, Norman Murray, Alison Peck, Cyrus Shafai, Gaetano Sivo, Jean-Pierre Veran, Howard Yee

Proceedings Volume 10702, 107021J (2018) https://doi.org/10.1117/12.2313924

KEYWORDS: Spectrographs, Galactic astronomy, Adaptive optics, Telescopes, James Webb Space Telescope, Stars, Infrared spectroscopy, Infrared radiation, Gemini Observatory, Imaging spectroscopy

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Proceedings Article | 10 July 2018 Paper

Paper

Upgrading the MMT AO system with a near-infrared pyramid wavefront sensor

Siqi Liu, Suresh Sivanandam, Shaojie Chen, Masen Lamb, Adam Butko, Jean-Pierre Veran, Phil Hinz, Etsuko Mieda, Tim Hardy, Olivier Lardiere, Eric Shore

Proceedings Volume 10703, 107032K (2018) https://doi.org/10.1117/12.2304584

KEYWORDS: Adaptive optics, Wavefront sensors, Prisms, Stars, Wavefronts, Near infrared, Monte Carlo methods, Modulation, Electron multiplying charge coupled devices, Sensors

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Proceedings Article | 9 July 2018 Paper

Paper

Gemini IRMOS: conceptual optical design of a multi-object adaptive optics-fed infrared integral-field spectrograph for the Gemini telescope

Shaojie Chen, Suresh Sivanandam, Simon Thibault, Denis Brousseau, Scott Chapman, Darren Erickson, Luc Simard, Paul Hickson, Gaetano Sivo

Proceedings Volume 10702, 107027E (2018) https://doi.org/10.1117/12.2311722

KEYWORDS: Iterated function systems, Sensors, Spectral resolution, Spectrographs, Cameras, Gemini Observatory, Adaptive optics, Diffraction, Astronomical imaging, Infrared telescopes

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Proceedings Article | 8 July 2018 Paper

Paper

Developing an infrared APD array camera for near-infrared wavefront sensing

Adam Butko, Suresh Sivanandam, Tim Hardy, Siqi Liu, Shaojie Chen, Jean-Pierre Veran, Philip Hinz

Proceedings Volume 10702, 107023N (2018) https://doi.org/10.1117/12.2314367

KEYWORDS: Sensors, Cryocoolers, Cameras, Wavefront sensors, Infrared sensors, Adaptive optics, Wavefronts, Infrared cameras

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Proceedings Article | 5 September 2017 Paper

Paper

Optical design of infrared pyramid wavefront sensor for the MMT

Shaojie Chen, Suresh Sivanandam, Siqi Liu, Jean-Pierre Veran, Phil Hinz, Etsuko Mieda, Tim Hardy, Olivier Lardiere

Proceedings Volume 10401, 104011H (2017) https://doi.org/10.1117/12.2273290

KEYWORDS: Wavefront sensors, Prisms, Adaptive optics, Wavefronts, Optical design, Mirrors, Telescopes, Infrared telescopes, Infrared radiation, Optical instrument design

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Proceedings Article | 9 August 2016 Paper

Paper

Optical design of MEMS-based infrared multi-object spectrograph concept for the Gemini South Telescope

Shaojie Chen, Suresh Sivanandam, Dae-Sik Moon

Proceedings Volume 9908, 99087N (2016) https://doi.org/10.1117/12.2230694

KEYWORDS: Optical design, Spectrographs, Astronomical imaging, James Webb Space Telescope, Spectroscopy, Imaging spectroscopy, Imaging systems, Adaptive optics, K band, Sensors

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Proceedings Article | 26 July 2016 Paper

Paper

The rapid transient surveyor

C. Baranec, J. Lu, S. Wright, J. Tonry, R. B. Tully, I. Szapudi, M. Takamiya, L. Hunter, R. Riddle, S. Chen, M. Chun

Proceedings Volume 9909, 99090F (2016) https://doi.org/10.1117/12.2230848

KEYWORDS: Adaptive optics, Telescopes, Spectrographs, Cameras, Iterated function systems, Sensors, Visible radiation, Prototyping, Infrared radiation, Mirrors

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Proceedings Article | 6 August 2014 Paper

Paper

The Infrared Imaging Spectrograph (IRIS) for TMT: instrument overview

Anna Moore, James Larkin, Shelley Wright, Brian Bauman, Jennifer Dunn, Brent Ellerbroek, Andrew Phillips, Luc Simard, Ryuji Suzuki, Kai Zhang, Ted Aliado, George Brims, John Canfield, Shaojie Chen, Richard Dekany, Alex Delacroix, Tuan Do, Glen Herriot, Bungo Ikenoue, Chris Johnson, Elliot Meyer, Yoshiyuki Obuchi, John Pazder, Vladimir Reshetov, Reed Riddle, Sakae Saito, Roger Smith, Ji Man Sohn, Fumihiro Uraguchi, Tomonori Usuda, Eric Wang, Lianqi Wang, Jason Weiss, Robert Wooff

Proceedings Volume 9147, 914724 (2014) https://doi.org/10.1117/12.2055216

KEYWORDS: IRIS Consortium, Spectrographs, Imaging systems, Adaptive optics, Telescopes, Diffraction, Stars, Cryogenics, Astronomy, Thirty Meter Telescope

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Proceedings Article | 28 July 2014 Paper

Paper

The infrared imaging spectrograph (IRIS) for TMT: volume phase holographic grating performance testing and discussion

Shaojie Chen, Elliot Meyer, Shelley Wright, Anna Moore, James Larkin, Jerome Maire, Etsuko Mieda, Luc Simard

Proceedings Volume 9147, 91478X (2014) https://doi.org/10.1117/12.2055609

KEYWORDS: Diffraction gratings, IRIS Consortium, Diffraction, Optical design, Astronomy, Spectrographs, Polarization, Spectral resolution, Modulation, Thirty Meter Telescope

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Proceedings Article | 28 July 2014 Paper

Paper

The infrared imaging spectrograph (IRIS) for TMT: reflective ruled diffraction grating performance testing and discussion

Elliot Meyer, Shaojie Chen, Shelley Wright, Anna Moore, James Larkin, Luc Simard, Jerome Marie, Etsuko Mieda, Jacob Gordon

Proceedings Volume 9147, 91479C (2014) https://doi.org/10.1117/12.2056839

KEYWORDS: Diffraction gratings, Reflectivity, IRIS Consortium, Polarization, Diffraction, Spectrographs, Astronomy, Spectral resolution, Cameras, Optical design

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We present the efficiency of near-infrared reflective ruled diffraction gratings designed for the InfraRed Imaging Spectrograph (IRIS). IRIS is a first light, integral field spectrograph and imager for the Thirty Meter Telescope (TMT) and narrow field infrared adaptive optics system (NFIRAOS). IRIS will operate across the near-infrared encompassing the ZYJHK bands (~0.84 - 2.4μm) with multiple spectral resolutions. We present our experimental setup and analysis of the efficiency of selected reflective diffraction gratings. These measurements are used as a comparison sample against selected candidate Volume Phase Holographic (VPH) gratings (see Chen et al., this conference). We investigate the efficiencies of five ruled gratings designed for IRIS from two separate vendors. Three of the gratings accept a bandpass of 1.19-1.37μm (J band) with ideal spectral resolutions of R=4000 and R=8000, groove densities of 249 and 516 lines/mm, and blaze angles of 9.86° and 20.54° respectively. The other two gratings accept a bandpass of 1.51-1.82μm (H Band) with an ideal spectral resolution of R=4000, groove density of 141 lines/mm, and blaze angle of 9.86°. The fraction of flux in each diffraction mode was compared to both a pure reflection mirror as well as the sum of the flux measured in all observable modes. We measure the efficiencies off blaze angle for all gratings and the efficiencies between the polarization transverse magnetic (TM) and transverse electric (TE) states. The peak reflective efficiencies are 98.90 ± 3.36% (TM) and 84.99 ± 2.74% (TM) for the H-band R=4000 and J-band R=4000 respectively. The peak reflective efficiency for the J-band R=8000 grating is 78.78 ± 2.54% (TE). We find that these ruled gratings do not exhibit a wide dependency on incident angle within ±3°. Our best-manufactured gratings were found to exhibit a dependency on the polarization state of the incident beam with a ~10-20% deviation, consistent with the theoretical efficiency predictions. This work will significantly contribute to the selection of the final grating type and vendor for the IRIS optical system, and are also pertinent to current and future near-infrared astronomical spectrographs.

Proceedings Article | 26 November 2012 Paper

Paper

A new type of wide spectral coverage echelle spectrometer design for ICP-AES

Shaojie Chen, Yuguo Tang, X. Bayanheshig, Xiangdong Qi, Wenyu Zhu

Proceedings Volume 8557, 85571M (2012) https://doi.org/10.1117/12.999677

KEYWORDS: Spectrographs, Prisms, Diffraction gratings, Spectral resolution, Sensors, Spectroscopy, Charge-coupled devices, Diffraction, Optical design, Quantum efficiency

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Showing 5 of 22 publications

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