• Compact fibre-based coherent anti-Stokes Raman scattering spectroscopy and interferometric coherent anti-Stokes Raman scattering from a single femtosecond fibre-laser oscillator

• # Fulltext

https://www.ias.ac.in/article/fulltext/pram/075/06/1129-1134

• # Keywords

Coherent anti-Stokes Raman scattering; nonlinear spectroscopy; coherent spectroscopy; interferometric CARS.

• # Abstract

We demonstrate a new approach to CARS spectroscopy by efficiently synthesizing synchronized narrow-bandwidth (less than 10 cm-1) pump and Stokes pulses (frequency difference continuously tunable upto $\sim 3000$ cm-1) based on spectral compression together with second harmonic generation (in periodically-poled nonlinear crystals) of femtosecond pulses emitted by a single compact Er-fibre oscillator. For a far better signal to non-resonant background contrast, interferometric CARS (I-CARS) is demonstrated and CARS signal enhancement upto three orders of magnitude is achieved by constructive interference with an auxiliary local oscillator at anti-Stokes field, also synthesized by spectral compression of pulses emitted from the same fibre oscillator.

• # Author Affiliations

1. Dipartmento di Fisica-Politecnico di Milano, ULTRAS-CNR-INFM, IFN-CNR, Piazza Leonardo da Vinci 32, 20133 Milano, Italy

• # Pramana – Journal of Physics

Volume 94, 2019
All articles
Continuous Article Publishing mode

• # Editorial Note on Continuous Article Publication

Posted on July 25, 2019
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