Abstract
We have employed a purely optical method to measure spin-lattice relaxation in the lower excited 4£>3/2 state of Er3+ in LaF3 at helium temperatures. Above 3 K the relaxation is dominated by an Orbach process through the upper 4S3/2 state. Below 3 K the relaxation is caused by some residual mechanism that obscures the Kramers-Van Vleck direct process. By relating the Orbach relaxation measurements to the homogeneous broadening of the upper 4S3/2 level, we determine values of the transition rates between the upper and lower 4S3/2 states.
| Original language | English |
|---|---|
| Pages (from-to) | 175-177 |
| Number of pages | 3 |
| Journal | Optics Letters |
| Volume | 3 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - Nov 1978 |
| Externally published | Yes |