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Proceedings Paper

Infrared beam control through acousto-magneto-optic interaction in a-Fe2O3
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Paper Abstract

Rapid control of the parameters of infrared radiation, such as amplitude, phase and the direction of propagation, is important in a number of military and commercial applications. Some examples are radar and lidar beam modulation and steering, optical communications and information processing. The suitability of canted antiferromagnet hematite ((alpha) -Fe2O3) for such applications is discussed. Experimental results of optical transmission in the 1 - 5 micrometers spectral interval, magneto- induced birefringence, acousto-magneto-optic diffraction, and the magnetic field dependencies of diffraction angle and efficiency (at a wavelength of 1.55 micrometers ) are presented in this paper. The combination of magneto-optic properties, which potentially introduce large induced birefringence, and acoustics (periodic modulation of birefringence along the cross-section of the optical beam), demonstrates enhanced efficiency of acousto-optic diffraction. Furthermore, an additional degree of freedom, which is the magnetic field tuning of acoustic velocities, is introduced. Directions for future development are also discussed.

Paper Details

Date Published: 13 July 2000
PDF: 8 pages
Proc. SPIE 4046, Advances in Optical Information Processing IX, (13 July 2000); doi: 10.1117/12.391952
Show Author Affiliations
Aramais A. Avakian, Physical Optics Corp. (United States)
Paul I. Shnitser, Physical Optics Corp. (United States)

Published in SPIE Proceedings Vol. 4046:
Advances in Optical Information Processing IX
Dennis R. Pape, Editor(s)

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