Effects of laser field statistics on coherent anti-Stokes Raman spectroscopy intensities
Abstract
The effects of intensity fluctuations in the frequency-doubled output of a multimode Nd:YAG pump laser on coherent anti-Stokes Raman spectroscopy (CARS) signal generation have been investigated in a crossed-beam, two-color CARS experiment. Measurements of signal intensity as a function of time delay (small compared with pulse length) in one pump beam show a maximum at zero delay. In measurements on a single unresolved transition, however, the nonresonant signal is enhanced by almost a factor of 2 more than the resonant signal. The results demonstrate the non-Gaussian nature of the laser field statistics and introduce new considerations into the analysis of experimental CARS spectra.
- Publication:
-
Optics Letters
- Pub Date:
- June 1984
- DOI:
- 10.1364/OL.9.000223
- Bibcode:
- 1984OptL....9..223R
- Keywords:
-
- Dye Lasers;
- Laser Outputs;
- Laser Spectroscopy;
- Raman Spectroscopy;
- Signal Measurement;
- Laser Pumping;
- Molecular Spectra;
- Nitrogen;
- Spectrum Analysis;
- Time Lag;
- Transient Response;
- Yag Lasers;
- Lasers and Masers;
- SPECTROSCOPY: RAMAN;
- COHERENT ANTI-STOKES RAMAN SCATTERING