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Proceedings Paper

Acousto-optic tunable filter using phased-array transducer with linearized RF to optical frequency mapping
Author(s): Sangtaek Kim; Lu Gao; Kelvin Wagner; Robert T. Weverka; Robert Mcleod
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Paper Abstract

We present an optimized design of an acousto-optic tunable filter (AOTF) using a phased-array transducer for a spectrally-multiplexed ultrafast pulse-shaping RF beamformer application. The momentum-space interaction geometry is used to optimize an AOTF using acoustic beam-steering techniques in combination with acoustic anisotropy in order to linearly map the applied RF frequency to the filtered output optical frequency. The appropriate crystal orientation and phased-array transducer design are determined to linearize the RF to optical frequency mapping even in the presence of optical dispersion of the birefringence. After optimizing the phased-array transducer, acoustic anisotropy, and optical anisotropic diffraction geometry, the designed AOTF will compensate for the birefringent dispersion of TeO2 to give a linear modulation of RF frequencies onto the corresponding optical frequencies. This linearized frequency mapped AOTF is required for a squint-compensated, wavelength-multiplexed, optically processed RF imager.

Paper Details

Date Published: 29 September 2005
PDF: 8 pages
Proc. SPIE 5953, Acousto-optics and Photoacoustics, 59530M (29 September 2005); doi: 10.1117/12.622623
Show Author Affiliations
Sangtaek Kim, Univ. of Colorado at Boulder (United States)
Lu Gao, Univ. of Colorado at Boulder (United States)
Kelvin Wagner, Univ. of Colorado at Boulder (United States)
Robert T. Weverka, Univ. of Colorado at Boulder (United States)
Robert Mcleod, Univ. of Colorado at Boulder (United States)

Published in SPIE Proceedings Vol. 5953:
Acousto-optics and Photoacoustics
Antoni Sliwinski; Rainer Reibold; Vitaly B. Voloshinov, Editor(s)

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