Multiplex coherent anti-Stokes Raman spectroscopy using a pulsed optical parametric oscillator

comparison of broadband and two-colour techniques

G. W. Baxter*, J. G. Haub, B. J. Orr

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

Abstract

The authors have succeeded in injection seeding a single pulsed optical parametric oscillator at two separate optical frequencies that fall within its intrinsically broad optical bandwidth, using a pair of external-cavity diode lasers. This OPO-based strategy enables single-shot, two-color multiplex coherent anti-Stokes Raman spectroscopy measurements that can be used for combustion diagnostics. Another form of multiplex OPO CARS employs a free-running OPO (with no form of wavelength control other than the phase matching condition) to generate broadband Stokes radiation for broadband multiplex CARS measurements. In both of these methods, the dispersed CARS spectrum is detected by a grating spectrometer and gated photodiode array. The relative advantage of two-color OPO CARS is that all the Stokes radiation is concentrated into two separate channels that are specifically tuned to spectroscopic features of interest, while the continuous spectral distribution of Stokes radiation employed in broadband CARS is spread non-selectively over the entire Raman spectrum.

Original languageEnglish
Title of host publicationConference on Lasers and Electro-Optics Europe - Technical Digest
Editors Anon
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages154-154
Number of pages1
ISBN (Print)0780331699
DOIs
Publication statusPublished - 1996
EventProceedings of the 1996 Conference on Lasers and Electro-Optics Europe, CLEO/Europe - Hamburg, Ger
Duration: 8 Sep 199613 Sep 1996

Other

OtherProceedings of the 1996 Conference on Lasers and Electro-Optics Europe, CLEO/Europe
CityHamburg, Ger
Period8/09/9613/09/96

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