Coherent anti-Stokes Raman microspectroscopy using spectral focusing with glass dispersion

Journal Article · Mon Nov 17 00:00:00 EST 2008 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3028346· OSTI ID:21175756

Rocha-Mendoza, Israel; Langbein, Wolfgang; Borri, Paola ^[1]

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1. School of Biosciences and School of Physics and Astronomy, Cardiff University, Museum Avenue, Cardiff CF10 3US (United Kingdom)

We demonstrate experimentally that coherent anti-Stokes Raman microspectroscopy with high spectral resolution is achieved using femtosecond laser pulses chirped up to a few picoseconds by glass elements of known group-velocity dispersion without significant intensity losses. By simply choosing the length of the glass, the chirp of Stokes and pump pulses is tailored to obtain a spectral resolution given by the Fourier limit of the chirped pulse duration. We show that for chirped pulse durations shorter than or comparable to the Raman coherence time, maximum signal occurs for a pump arriving after the Stokes pulse, a time-ordering effect confirmed by numerical simulations.

• OSTI ID: 21175756
• Journal Information: Applied Physics Letters, Vol. 93, Issue 20; Other Information: DOI: 10.1063/1.3028346; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DISPERSIONS
FOCUSING
GLASS
LASERS
PULSES
RAMAN EFFECT
RESOLUTION
SIGNALS
SIMULATION