Coherent Phonon Decay of Raman Active Vibrations Within Oxide Groups of KTiOPO4

We present on decay of Raman active modes of potassium titanyl phosphate (KTiOPO
4
) using a tunable ultrafast Coherent Anti-stokes Raman spectroscopy (CARS) system. Decay transients were around 70 dB signal spans with equivalent spectral resolution of better than
$0.15 \text{cm}^{-1}$
and temporal resolution
$< 120$
fs.