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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 3 — Feb. 1, 2010
  • pp: 294–296

Spectral broadening in ultrafast semiconductor optical amplifiers induced by gain dynamics and self-phase modulation

Prashant P. Baveja, Drew N. Maywar, Aaron M. Kaplan, and Govind P. Agrawal  »View Author Affiliations


Optics Letters, Vol. 35, Issue 3, pp. 294-296 (2010)
http://dx.doi.org/10.1364/OL.35.000294


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Abstract

We investigate experimentally the self-phase modulation (SPM) induced by gain dynamics on picosecond pulses in semiconductor optical amplifiers whose gain recovery is enhanced by amplified spontaneous emission (ASE). The observed pulse spectra are highly asymmetric at low drive currents but become more symmetric with increasing current, owing to the ASE-induced reduction in the gain-recovery time down to 9 ps. Furthermore, the amount of spectral broadening is shown to saturate with drive current. We show that a variety of spectral-lobe strengths is selectable, while maintaining a nearly constant small-signal gain, a feature desirable for all-optical signal processing applications.

© 2010 Optical Society of America

OCIS Codes
(190.5970) Nonlinear optics : Semiconductor nonlinear optics including MQW
(230.4320) Optical devices : Nonlinear optical devices
(250.5980) Optoelectronics : Semiconductor optical amplifiers

ToC Category:
Optical Devices

History
Original Manuscript: November 3, 2009
Revised Manuscript: December 15, 2009
Manuscript Accepted: December 16, 2009
Published: January 22, 2010

Citation
Prashant P. Baveja, Drew N. Maywar, Aaron M. Kaplan, and Govind P. Agrawal, "Spectral broadening in ultrafast semiconductor optical amplifiers induced by gain dynamics and self-phase modulation," Opt. Lett. 35, 294-296 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-3-294

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