Observation of laser-jitter-enhanced hyperfine spectroscopy and two-photonspectral hole-burning

We have observed laser-jitter-enhanced high-resolution spectra of three hyp erfine states in the ground level (H-3(4)) of Pr3+:Y2SiO5 using coherent po pulation trapping and phase-correlated four-wave mixing. We have also obser ved optical Raman pulse excited two-photon spectral hole-burning. The obser ved high-resolution spectra are due to a laser-jitter-suppressed Raman cohe rence window in an inhomogeneously broadened solid system, and the observed two-photon spectral hole-burning has potential to increase data capacity i n Raman excited optical memory (Opt. Lett. 22 (1997) 1849). (C) 1999 Elsevi er Science B.V. All rights reserved.