NDLI: Efficient adaptive feedback control of ultrafast semiconductor nonlinearities

Content Provider	IEEE Xplore Digital Library
Author	Kunde, J. Baumann, B. Arlt, S. Morier-Genoud, F. Keller, U. Siegner, U.
Copyright Year	2001
Description	Author affiliation: Inst. for Quantum Electron., Swiss Fed. Inst. of Technol., Zurich, Switzerland (Kunde, J.; Baumann, B.; Arlt, S.; Morier-Genoud, F.; Keller, U.)
Abstract	Summary form only given. We present the first experimental demonstration of adaptive feedback control in ultrafast semiconductor spectroscopy. Our work focuses on broadband continuum nonlinearities, which are an ideal arena for adaptive optimization schemes. This is because the optical pulse shape that produces a desired nonlinear response is very difficult to predict a priori due to the complex physics involved. Our results demonstrate that (i) a posteriori knowledge of the optimum pulse shape gives new insight into the interaction of semiconductors and ultrafast optical pulses; and that (ii) ultrafast semiconductor nonlinearities can be substantially enhanced by almost a factor of 4. In a pump-probe experiment, a pixelated liquid-crystal spatial light modulator is used to shape the spectral phase of 20 fs pulses without modification of the spectral amplitude. The pulse shaping is directed by an evolutionary strategy.
Sponsorship	APS/Div. Laser Sci.
Starting Page	195
Ending Page	196
File Size	291263
Page Count	2
File Format	PDF
ISBN	155752663X
DOI	10.1109/QELS.2001.962057
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-05-11
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Optical Soc. Of America
Subject Keyword	Programmable control Spectroscopy Optical pulse shaping Phase modulation Amplitude modulation Feedback control Adaptive control Pulse modulation Physics Optical pulses
Content Type	Text
Resource Type	Article

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