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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 13 — Jul. 1, 2007
  • pp: 1872–1874

High-speed all-optical differentiator based on a semiconductor optical amplifier and an optical filter

Jing Xu, Xinliang Zhang, Jianji Dong, Deming Liu, and Dexiu Huang  »View Author Affiliations


Optics Letters, Vol. 32, Issue 13, pp. 1872-1874 (2007)
http://dx.doi.org/10.1364/OL.32.001872


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Abstract

We demonstrate a novel all-optical differentiator that carries out the first-order temporal derivation of optical intensity variation at high speed. It consists of a semiconductor optical amplifier (SOA) and an optical filter (OF) serving as an optical phase modulator and a frequency discriminator, respectively. A polarity-reversed derivative pair with a certain bias can be obtained by locating the probe wavelength at the positive or negative slope of the OF. Differentiations of super-Gaussian and Gaussian signals are obtained at various data rates. Defined as the mean absolute deviation of the measured result from the ideal result, total average errors of less than 0.12 are observed in all cases. Input power dynamics as well as control wavelength dependence are investigated and show that the cross-gain modulation in the SOA is detrimental to the differentiation performance.

© 2007 Optical Society of America

OCIS Codes
(070.4560) Fourier optics and signal processing : Data processing by optical means
(250.5980) Optoelectronics : Semiconductor optical amplifiers

ToC Category:
Fourier optics and signal processing

History
Original Manuscript: March 13, 2007
Revised Manuscript: May 1, 2007
Manuscript Accepted: May 1, 2007
Published: June 21, 2007

Citation
Jing Xu, Xinliang Zhang, Jianji Dong, Deming Liu, and Dexiu Huang, "High-speed all-optical differentiator based on a semiconductor optical amplifier and an optical filter," Opt. Lett. 32, 1872-1874 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-13-1872

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