Abstract
In this article we show that heterodyne CARS, based on a controlled and stable phase-preserving chain, can be used to measure amplitude and phase information of molecular vibration modes. The technique is validated by a comparison of the imaginary part of the heterodyne CARS spectrum to the spontaneous Raman spectrum of polyethylene. The detection of the phase allows for rejection of the non-resonant background from the data. The resulting improvement of the signal to noise ratio is shown by measurements on a sample containing lipid.
Original language | English |
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Pages (from-to) | 15863-15869 |
Number of pages | 7 |
Journal | Optics express |
Volume | 16 |
Issue number | 20 |
DOIs | |
Publication status | Published - 2008 |