Table 1 Simulation parameters for Tm3+/Ho3+ doped cores.
Quantity | Symbol | Value | Unit |
|---|---|---|---|
Thulium concentration | NTm | 1.65 × 1026 | m−3 |
Holmium concentration | NHo | 2.06 × 1025 | m−3 |
Fiber length | Lf | 0.25 | m |
Core radius | rc | 7.5 | µm |
Pumping wavelength | λexc | 808 | nm |
Lifetime of level 3F4 | τ1 | 1922 | µs |
Lifetime of level 3H4 | τ2 | 11 | µs |
Lifetime of level 5I7 | τ3 | 3332 | µs |
Energy transfer coefficient Tm → Ho | WET | 5 × 10−21 | m3/s |
Maximum absorption cross-section (Tm) | σa1 | 3.29 × 10−21 | cm2 |
Maximum emission cross-section (Tm) | σe1 | 5.28 × 10–21 | cm2 |
Maximum absorption cross-section (Ho) | σa2 | 12.89 × 10−21 | cm2 |
Maximum emission cross-section (Ho) | σe2 | 14.82 × 10−21 | cm2 |
Pump absorption coefficient at 808 nm | αTm | 0.149 | cm−1 |
