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Narrowband spectroscopy by an all-optical correlation of broadband laser pulses

Stanislav O. Konorov, Xiaoji G. Xu, John W. Hepburn, and Valery Milner
Phys. Rev. A 79, 031801(R) – Published 5 March 2009

Abstract

High-peak-power ultrafast lasers are widely used in nonlinear spectroscopy, but often limit its spectral resolution because of the broad frequency bandwidth of ultrashort laser pulses. Improving the resolution by achieving spectrally narrow excitation of, or emission from, the resonant medium by means of multiphoton interferences has been the focus of many recent developments in ultrafast spectroscopy. We demonstrate an alternative approach in which high resolution is exercised by detecting narrow spectral correlations between broadband excitation and emission optical fields. All-optical correlation analysis, easily incorporated into a traditional spectroscopic setup, enables direct, robust, and simultaneous detection of multiple narrow resonances in a single measurement.

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  • Received 11 August 2008

DOI:https://doi.org/10.1103/PhysRevA.79.031801

©2009 American Physical Society

Authors & Affiliations

Stanislav O. Konorov, Xiaoji G. Xu, John W. Hepburn, and Valery Milner

  • Department of Chemistry and The Laboratory for Advanced Imaging and Spectroscopic Research (LASIR), The University of British Columbia, Vancouver, Canada V6T 1Z1

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Vol. 79, Iss. 3 — March 2009

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