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Titre de la technologie / Technology Title
Référence optique du spectre de battement pour peigne(s) de fréquence
A new approach is described to compensate the variations induced by laser frequency instabilities in the recently demonstrated Fourier transform spectroscopy based on two frequency combs generated by mode-locked lasers. The proposed method extracts the mutual fluctuations of the lasers by monitoring the beating signal for two known optical frequencies. From this information, a phase correction and a new measurement grid are determined that allow the full correction of the measured interferograms. The achievable resolution and accuracy are thus greatly enhanced. Last but not least, the proposed method has demonstrated amazing performances, is very simple and can be applied to any heterodyne measurements using frequency combs.
- Philippe Giaccari
- Pierre Tremblay
- Philippe Saucier
- Jean-Daniel Deschênes