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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 44, Iss. 27 — Sep. 20, 2005
  • pp: 5797–5801

Acousto-optic tunable filter sidelobe analysis and reduction with telecentric confocal optics

Dennis R. Suhre and Neelam Gupta  »View Author Affiliations


Applied Optics, Vol. 44, Issue 27, pp. 5797-5801 (2005)
http://dx.doi.org/10.1364/AO.44.005797


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Abstract

The acousto-optic tunable filter (AOTF) has optical sidelobes that are due to the acoustic field produced by the transducer. These sidelobes were analyzed by wave-vector phase matching between the optical and acoustic fields, which correlated with measurements made with a TeO2 AOTF. A white-light point source was filtered and imaged, showing reasonably large and slowly decreasing sidelobes covering a large spectral range. This effect reduces the image quality of an AOTF system by producing faint secondary images of bright objects. The image quality can be improved with a telecentric confocal optical arrangement in which the angular shift of the sidelobes is greatly reduced, producing a much sharper image. This effect was also demonstrated experimentally with the point source.

© 2005 Optical Society of America

OCIS Codes
(220.1000) Optical design and fabrication : Aberration compensation
(230.1040) Optical devices : Acousto-optical devices

History
Original Manuscript: December 8, 2004
Revised Manuscript: April 21, 2005
Manuscript Accepted: April 22, 2005
Published: September 20, 2005

Citation
Dennis R. Suhre and Neelam Gupta, "Acousto-optic tunable filter sidelobe analysis and reduction with telecentric confocal optics," Appl. Opt. 44, 5797-5801 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-27-5797

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