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Applied Optics

Applied Optics


  • Vol. 37, Iss. 21 — Jul. 20, 1998
  • pp: 4569–4576

Spectrometer Slit-Power-Coupling Calculations for Natural and Laser Guide-Star Adaptive Optics

David W. Tyler and Brent L. Ellerbroek  »View Author Affiliations

Applied Optics, Vol. 37, Issue 21, pp. 4569-4576 (1998)

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We use numerical calculations to examine the relation between adaptive optics (AO) turbulence compensation and power coupled through a spectrometer slit for both laser and natural guide-star AO systems. The AO system and observing parameters used are relevant to the Gemini-North 8-m telescope. For this study, we separate residual tilt from residual higher-order aberrations to isolate their relative effects under a variety of operating conditions. Our results demonstrate that slit-coupled intensity is not uniquely determined by system Strehl alone; we show that this is due to the differing effects of higher-order and tilt aberrations on the shape of the compensated point-spread function. For the Gemini spectrometer and AO system, the wider point-spread function halo associated with an added residual higher-order aberration reduces slit-coupled intensity more rapidly than a broad point-spread function core induced by residual tilt.

© 1998 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(300.6190) Spectroscopy : Spectrometers

David W. Tyler and Brent L. Ellerbroek, "Spectrometer Slit-Power-Coupling Calculations for Natural and Laser Guide-Star Adaptive Optics," Appl. Opt. 37, 4569-4576 (1998)

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