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

Aramais A. Avakian; Paul I. Shnitser

doi:10.1117/12.391952

13 July 2000 Infrared beam control through acousto-magneto-optic interaction in α-Fe₂O₃

Proceedings Volume 4046, Advances in Optical Information Processing IX; (2000) https://doi.org/10.1117/12.391952
Event: AeroSense 2000, 2000, Orlando, FL, United States

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.

Citation Download Citation

Aramais A. Avakian and Paul I. Shnitser "Infrared beam control through acousto-magneto-optic interaction in α-Fe₂O₃", Proc. SPIE 4046, Advances in Optical Information Processing IX, (13 July 2000); https://doi.org/10.1117/12.391952

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