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High-sensitivity two-photon absorption microcavity autocorrelator

Krug, T. and Lynch, Michael and Bradley, Ann Louise and Donegan, John Francis and Barry, Liam P. and Folliot, H. and Roberts, J.S. and Hill, G. (2004) High-sensitivity two-photon absorption microcavity autocorrelator. IEEE Photonics Technology Letters, 16 (6). pp. 1543-1545. ISSN 1041-1135

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A GaAs-AlAs microcavity device has been used as a photodetector in an autocorrelator for measuring the temporal pulsewidth of 1.5-/spl mu/m optical pulses. Enhancement of the two-photon absorption photocurrent due to the microcavity structure results in an autocorrelation (average power times peak power) sensitivity of 9.3/spl times/10/sup -4/ (mW)/sup 2/, which represents two orders of magnitude improvement when compared with conventional autocorrelators.

Item Type:Article (Published)
Uncontrolled Keywords:Cavities; correlation; nonlinear detection; optical pulse measurements; photodetectors; photodiodes;
Subjects:Physical Sciences > Optoelectronics
Engineering > Optical communication
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Engineering and Computing > School of Electronic Engineering
Research Initiatives and Centres > Research Institute for Networks and Communications Engineering (RINCE)
Publisher:Institute of Electrical and Electronics Engineers
Official URL:
Copyright Information:Copyright © 2004 IEEE. Reprinted from IEEE Photonics Technology Letters.This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the Dublin City University's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to By choosing to view this document, you agree to all provisions of the copyright laws protecting it.
ID Code:173
Deposited On:28 Jan 2008 by DORAS Administrator. Last Modified 02 Feb 2009 13:30

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