-70 dB optical carrier suppression by two-beam coupling in photorefractive media |
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| Authors: | D.Z. Anderson V. Damiao D. Popovic Z. Popovic S. Romisch A. Sullivan |
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| Affiliation: | (1) Department of Physics and JILA, University of Colorado, Boulder CO, 80309-0440, USA, US;(2) Deptartment of Electrical and Computer Engineering, University of Colorado, Boulder CO, 80309-0425, USA, US |
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| Abstract: | Suppression of an optical carrier from an RF modulated laser beam of wavelength 532 nm is performed using two-beam coupling in photorefractive barium titanate. A theoretical analysis reveals that perfect suppression can be achieved at a specific modulation strength, which depends on the gain and intensity ratio between the two beams. The experiments achieve a maximum of -72.9±2.4 dB carrier suppression at the theoretically ideal modulation strength, and -61.0±2.4 dB for small modulation strengths. Received: 29 November 2000 / Revised version: 2 February 2001 / Published online: 27 April 2001 |
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| Keywords: | PACS: 42.6.5-k 42.65 Hw 42.40.Kw |
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