R.M. Macfarlane
3rd International Conference Laser M2P 1993
Spectral hole burning is reported for the trivalent thulium ion with measurements on the 3H6(1) ↔ 3H4(1) transition of LaF3+ and two sites (A and B) of CaF2+ at 1.5 K. Hole burning occurs by population storage in the metastable 3F4 level. The holes were scanned by an electric-field ramp applied directly to the sample, the frequency being calibrated by burning multiple holes with a frequency-modulated laser. This yielded the hole widths as well as the Stark coefficients for the transition studied, which are 8.3 kHz/V cm−1 parallel to the C2 axis (LaF3+) and for CaF2+ are 25 kHz/V cm−1 (site A), and 4.6 kHz/V cm−1 (site B) for fields along the (001) direction. From the polarization behavior of the holes, the sites in CaF2 are assigned to the F−-compensated C4v and C3v sites, respectively. © 1993 Optical Society of America.
R.M. Macfarlane
3rd International Conference Laser M2P 1993
X. Jiang, R. Wang, et al.
Physical Review Letters
R.M. Macfarlane, R.M. Shelby
Optics Communications
R.M. Macfarlane, F. Tong, et al.
IQEC 1988