Evolutionary timescales of AO-produced speckles at NIR wavelengths

Sean B. Goebel; Olivier Guyon; Donald N B Hall; Nemanja Jovanovic; Dani E. Atkinson

doi:10.1117/12.2231926

Evolutionary timescales of AO-produced speckles at NIR wavelengths

Sean B. Goebel^*, Olivier Guyon, Donald N B Hall, Nemanja Jovanovic, Dani E. Atkinson

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

13 Citations (Scopus)

139 Downloads (Pure)

Abstract

We present measurements of the evolutionary timescales of speckles around adaptive optics-corrected PSFs. We placed a SELEX SAPHIRA HgCdTe detector behind the SCExAO instrument at Subaru Telescope. We analyzed the behavior of speckles at radial distances of 2-8 λ/D away from the diffraction-limited PSF in H-band (∼1.6μm) images collected at ∼1 kHz framerates. Speckles evolve with a variety of timescales, and these have not previously been studied at near-infrared wavelengths. Ultimately we would like to image reflected-light exoplanets, which necessitates a fast speckle control loop. Based on our measurements, we calculate the parameters of an optimized control loop that would enable such observations.

Original language	English
Title of host publication	Adaptive Optics Systems V
Editors	Enrico Marchetti, Laird M. Close, Jean-Pierre Véran
Publisher	SPIE
Pages	1-9
Number of pages	9
ISBN (Electronic)	9781510601970
DOIs	https://doi.org/10.1117/12.2231926
Publication status	Published - 2016
Event	Adaptive Optics Systems V - Edinburgh, United Kingdom Duration: 26 Jun 2016 → 1 Jul 2016

Publication series

Name	Proceedings of SPIE
Publisher	SPIE
Volume	9909
ISSN (Print)	0277-786X

Other

Other	Adaptive Optics Systems V
Country/Territory	United Kingdom
City	Edinburgh
Period	26/06/16 → 1/07/16

Keywords

Extreme adaptive optics
High-contrast imaging
SAPHIRA
SCExAO
Speckles

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10.1117/12.2231926

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Cite this

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title = "Evolutionary timescales of AO-produced speckles at NIR wavelengths",

abstract = "We present measurements of the evolutionary timescales of speckles around adaptive optics-corrected PSFs. We placed a SELEX SAPHIRA HgCdTe detector behind the SCExAO instrument at Subaru Telescope. We analyzed the behavior of speckles at radial distances of 2-8 λ/D away from the diffraction-limited PSF in H-band (∼1.6μm) images collected at ∼1 kHz framerates. Speckles evolve with a variety of timescales, and these have not previously been studied at near-infrared wavelengths. Ultimately we would like to image reflected-light exoplanets, which necessitates a fast speckle control loop. Based on our measurements, we calculate the parameters of an optimized control loop that would enable such observations.",

keywords = "Extreme adaptive optics, High-contrast imaging, SAPHIRA, SCExAO, Speckles",

author = "Goebel, {Sean B.} and Olivier Guyon and Hall, {Donald N B} and Nemanja Jovanovic and Atkinson, {Dani E.}",

year = "2016",

doi = "10.1117/12.2231926",

language = "English",

series = "Proceedings of SPIE",

publisher = "SPIE",

pages = "1--9",

editor = "Enrico Marchetti and Close, {Laird M.} and Jean-Pierre V{\'e}ran",

booktitle = "Adaptive Optics Systems V",

address = "United States",

note = "Adaptive Optics Systems V ; Conference date: 26-06-2016 Through 01-07-2016",

}

Evolutionary timescales of AO-produced speckles at NIR wavelengths. / Goebel, Sean B.; Guyon, Olivier; Hall, Donald N B et al.
Adaptive Optics Systems V. ed. / Enrico Marchetti; Laird M. Close; Jean-Pierre Véran. SPIE, 2016. p. 1-9 990918 (Proceedings of SPIE; Vol. 9909).

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

TY - GEN

T1 - Evolutionary timescales of AO-produced speckles at NIR wavelengths

AU - Goebel, Sean B.

AU - Guyon, Olivier

AU - Hall, Donald N B

AU - Jovanovic, Nemanja

AU - Atkinson, Dani E.

PY - 2016

Y1 - 2016

N2 - We present measurements of the evolutionary timescales of speckles around adaptive optics-corrected PSFs. We placed a SELEX SAPHIRA HgCdTe detector behind the SCExAO instrument at Subaru Telescope. We analyzed the behavior of speckles at radial distances of 2-8 λ/D away from the diffraction-limited PSF in H-band (∼1.6μm) images collected at ∼1 kHz framerates. Speckles evolve with a variety of timescales, and these have not previously been studied at near-infrared wavelengths. Ultimately we would like to image reflected-light exoplanets, which necessitates a fast speckle control loop. Based on our measurements, we calculate the parameters of an optimized control loop that would enable such observations.

AB - We present measurements of the evolutionary timescales of speckles around adaptive optics-corrected PSFs. We placed a SELEX SAPHIRA HgCdTe detector behind the SCExAO instrument at Subaru Telescope. We analyzed the behavior of speckles at radial distances of 2-8 λ/D away from the diffraction-limited PSF in H-band (∼1.6μm) images collected at ∼1 kHz framerates. Speckles evolve with a variety of timescales, and these have not previously been studied at near-infrared wavelengths. Ultimately we would like to image reflected-light exoplanets, which necessitates a fast speckle control loop. Based on our measurements, we calculate the parameters of an optimized control loop that would enable such observations.

KW - Extreme adaptive optics

KW - High-contrast imaging

KW - SAPHIRA

KW - SCExAO

KW - Speckles

UR - http://www.scopus.com/inward/record.url?scp=85002487967&partnerID=8YFLogxK

U2 - 10.1117/12.2231926

DO - 10.1117/12.2231926

M3 - Conference proceeding contribution

AN - SCOPUS:85002487967

T3 - Proceedings of SPIE

SP - 1

EP - 9

BT - Adaptive Optics Systems V

A2 - Marchetti, Enrico

A2 - Close, Laird M.

A2 - Véran, Jean-Pierre

PB - SPIE

T2 - Adaptive Optics Systems V

Y2 - 26 June 2016 through 1 July 2016

ER -

Evolutionary timescales of AO-produced speckles at NIR wavelengths

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