Laser guide star AO project at the Subaru Telescope

Hideki Takami, Makoto Watanabe, Naruhisa Takato, Stephen Colley, Michael Eldred, Thomas Kane, Olivier Guyon, Masayuki Hattori, Miwa Goto, Masanori Iye, Yutaka Hayano, Yukiko Kamata, Nobuo Arimoto, Naoto Kobayashi, Yosuke Minowa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

19 Citations (Scopus)

Abstract

The laser guide star adaptive optics (AO) system for Subaru Telescope is presented. The system will be installed at the IR Nasmyth platform, whereas the current AO system with 36 elements is operating at the Cassegrain focus. The new AO system has a 188 element wavefront curvature sensor with photon counting APD modules which is the largest control element curvature sensor system ever. The system will have 4-10 W solid state sum-frequency laser to generate a laser guide star. The laser launching telescope with 50 cm aperture will be installed at behind the secondary mirror. The laser unit will be installed on the third floor of the dome and the laser beam will be transferred to the laser launching telescope using single mode photonic crystal fiber cable. The field of view of the optics is 2.7 arcmin to maximize the probability to find tilt guide stars for laser guide star operation. The expected Strehl ratio as raw AO performance is 0.46 at H-band under 0.60" seeing with 12 th mag guide star, and 0.71 for 8 th mag stars. New wavefront modulation technique, dual stroke membrane mirror control, is developed to reduce the tilt error which is more dominant for curvature sensor AO system. The superb contrast imaging capability will be expected as natural guide star system. The first light as the natural guide star system is planned in March 2006, the laser first light will be expected in March 2007.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsD.B. Calia, B.L. Ellerbroek, R. Ragazzoni
Pages837-845
Number of pages9
Volume5490
EditionPART 2
DOIs
StatePublished - 2004
Externally publishedYes
EventAdvancements in Adaptive Optics - Glasgow, United Kingdom
Duration: Jun 21 2004Jun 25 2004

Other

OtherAdvancements in Adaptive Optics
CountryUnited Kingdom
CityGlasgow
Period6/21/046/25/04

Fingerprint

laser guide stars
Adaptive optics
adaptive optics
Telescopes
Stars
telescopes
stars
Lasers
launching
lasers
curvature
sensors
mirrors
Launching
Wavefronts
Sensors
domes
Mirrors
strokes
cables

Keywords

  • Adaptive optics
  • Curvature sensor
  • Laser guide star
  • Subaru telescope
  • Wavefront sensing

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Takami, H., Watanabe, M., Takato, N., Colley, S., Eldred, M., Kane, T., ... Minowa, Y. (2004). Laser guide star AO project at the Subaru Telescope. In D. B. Calia, B. L. Ellerbroek, & R. Ragazzoni (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (PART 2 ed., Vol. 5490, pp. 837-845). [75] https://doi.org/10.1117/12.550839

Laser guide star AO project at the Subaru Telescope. / Takami, Hideki; Watanabe, Makoto; Takato, Naruhisa; Colley, Stephen; Eldred, Michael; Kane, Thomas; Guyon, Olivier; Hattori, Masayuki; Goto, Miwa; Iye, Masanori; Hayano, Yutaka; Kamata, Yukiko; Arimoto, Nobuo; Kobayashi, Naoto; Minowa, Yosuke.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / D.B. Calia; B.L. Ellerbroek; R. Ragazzoni. Vol. 5490 PART 2. ed. 2004. p. 837-845 75.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Takami, H, Watanabe, M, Takato, N, Colley, S, Eldred, M, Kane, T, Guyon, O, Hattori, M, Goto, M, Iye, M, Hayano, Y, Kamata, Y, Arimoto, N, Kobayashi, N & Minowa, Y 2004, Laser guide star AO project at the Subaru Telescope. in DB Calia, BL Ellerbroek & R Ragazzoni (eds), Proceedings of SPIE - The International Society for Optical Engineering. PART 2 edn, vol. 5490, 75, pp. 837-845, Advancements in Adaptive Optics, Glasgow, United Kingdom, 6/21/04. https://doi.org/10.1117/12.550839
Takami H, Watanabe M, Takato N, Colley S, Eldred M, Kane T et al. Laser guide star AO project at the Subaru Telescope. In Calia DB, Ellerbroek BL, Ragazzoni R, editors, Proceedings of SPIE - The International Society for Optical Engineering. PART 2 ed. Vol. 5490. 2004. p. 837-845. 75 https://doi.org/10.1117/12.550839
Takami, Hideki ; Watanabe, Makoto ; Takato, Naruhisa ; Colley, Stephen ; Eldred, Michael ; Kane, Thomas ; Guyon, Olivier ; Hattori, Masayuki ; Goto, Miwa ; Iye, Masanori ; Hayano, Yutaka ; Kamata, Yukiko ; Arimoto, Nobuo ; Kobayashi, Naoto ; Minowa, Yosuke. / Laser guide star AO project at the Subaru Telescope. Proceedings of SPIE - The International Society for Optical Engineering. editor / D.B. Calia ; B.L. Ellerbroek ; R. Ragazzoni. Vol. 5490 PART 2. ed. 2004. pp. 837-845
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