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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 15 — Jul. 20, 2009
  • pp: 12767–12776

Cascaded acousto-optical system for the modulation of unpolarized light

Jean-Claude Kastelik, Konstantin B. Yushkov, Samuel Dupont, and Vitaly B. Voloshinov  »View Author Affiliations

Optics Express, Vol. 17, Issue 15, pp. 12767-12776 (2009)

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A cascaded system of two acousto-optical cells is proposed for equalization of multichannel optical signal satisfying coarse wavelength-division multiplexing standard. Two similar acousto-optical modulators for unpolarized light on the basis of 10°-cut paratellurite crystals were used in a free-space gap of a fiber line. The system controlled intensity of several optical carriers in the spectral range from 1200 to 1700 nm. The device was tested in a four-channel regime of operation in the range 1510–1570 nm. Overall optical insertion losses did not exceed -2 dB and less than 1 W electric power per channel was necessary for -20 dB intensity attenuation of the signal in a continuous operation mode. Compensation for birefringence in paratellurite provided diffraction regime that was insensitive to polarization of light. Interchannel crosstalk was less than -10 dB.

© 2009 Optical Society of America

OCIS Codes
(060.4080) Fiber optics and optical communications : Modulation
(070.1060) Fourier optics and signal processing : Acousto-optical signal processing

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: January 23, 2009
Revised Manuscript: May 27, 2009
Manuscript Accepted: May 27, 2009
Published: July 13, 2009

Jean-Claude Kastelik, Konstantin B. Yushkov, Samuel Dupont, and Vitaly B. Voloshinov, "Cascaded acousto-optical system for modulation of unpolarized light," Opt. Express 17, 12767-12776 (2009)

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