| Cross-sectional absorption of Er3+ | σ13 (λp) | 2.58 × 10−25 m2 |
| Cross-sectional absorption of Yb3+ | σ45 (λp) | 1.0 × 10−24 m2 |
| Emission cross section of Yb3+ | σ54 (λp) | 1.0 × 10−24 m2 |
| Cross-sectional absorption of Er3+ | σ12 (λs) | 6.5 × 10−25 m2 |
| Emission cross section of Er3+ | σ21 (λs) | 9.0 × 10−25 m2 |