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

TitleNarrowband spectroscopy by an all-optical correlation of broadband laser pulses
Publication TypeJournal Article
Year of Publication2009
AuthorsKonorov, SO, Xu, XJG, Hepburn, JW, Milner, V
JournalPhysical Review A
Date PublishedMar
Type of ArticleArticle
ISBN Number1050-2947
Keywords2-PHOTON, 2ND-HARMONIC GENERATION, CARS, COHERENT, DYNAMICS, FEMTOSECOND PULSES, high-speed optical techniques, laser beams, measurement by laser beam, microscopy, MULTIPHOTON INTRAPULSE INTERFERENCE, multiphoton processes, optical correlation, STOKES-RAMAN SCATTERING

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.

URL<Go to ISI>://000264770200011