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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 20 — Oct. 15, 2007
  • pp: 3029–3031

All-optical differentiator based on cross-gain modulation in semiconductor optical amplifier

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


Optics Letters, Vol. 32, Issue 20, pp. 3029-3031 (2007)
http://dx.doi.org/10.1364/OL.32.003029


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Abstract

A novel scheme for carrying out all-optical intensity differentiation is proposed and demonstrated based on the cross-gain modulation (XGM) in a semiconductor optical amplifier (SOA). Because of the XGM, the mathematical definition of differentiation can be expressed by the combined power of the amplified pump pulse and the delayed modulated probe pulse at the output of the SOA. The final waveform and error evolution versus relative time delay between two pulses is investigated. Interestingly enough, it is shown that the acquisition of good differentiation is possible under zero time delay. A further study of zero time delay has been performed for various data rates and shows that the carrier recovery time of the SOA is a speed-limiting factor of the scheme.

© 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: July 11, 2007
Revised Manuscript: September 12, 2007
Manuscript Accepted: September 12, 2007
Published: October 11, 2007

Citation
Jing Xu, Xinliang Zhang, Jianji Dong, Deming Liu, and Dexiu Huang, "All-optical differentiator based on cross-gain modulation in semiconductor optical amplifier," Opt. Lett. 32, 3029-3031 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-20-3029

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