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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 10 — May. 14, 2007
  • pp: 5898–5904

All-optical transversal filter with tap doubling and negative coefficients based on polarization modulation

Choong Keun Oh, Tae-Young Kim, and Chang-Soo Park  »View Author Affiliations

Optics Express, Vol. 15, Issue 10, pp. 5898-5904 (2007)

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A novel all-optical transversal filter with negative coefficients and tap doubling is proposed and experimentally demonstrated. Based on polarization modulation using the anisotropy of the electro-optic coefficient of LiNbO3 crystals, negative and positive coefficients are simultaneously generated. Tap doubling is also achieved by using wavelength- and polarization-dependent time delays in fiber. Due to the orthogonal polarity between the two coefficients of each wavelength, the proposed filter is free from coherent interference and the synthesis of filter taps is performed in the optical domain. The experimental results demonstrated that stable 6-tap bandpass filter characteristics can be obtained by using only three optical sources.

© 2007 Optical Society of America

OCIS Codes
(070.6020) Fourier optics and signal processing : Continuous optical signal processing

ToC Category:
Fourier Optics and Optical Signal Processing

Original Manuscript: December 7, 2006
Revised Manuscript: April 23, 2007
Manuscript Accepted: April 26, 2007
Published: April 30, 2007

Choong K. Oh, Tae-Young Kim, and Chang-Soo Park, "All-optical transversal filter with tap doubling and negative coefficients based on polarization modulation," Opt. Express 15, 5898-5904 (2007)

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