Tool · Laser characterization
T₀ Extraction Calculator
Paste threshold-current vs. temperature data. The calculator fits $\ln I_{th}$ vs. $T$ and returns the characteristic temperature $T_0$ and pre-exponential $I_0$, with the residual R².
Two columns. Comma, space, or tab separated. Lines starting with # are ignored.
Fit results
- T0
- 58.2 K
- I0
- 0.052 mA
- R²
- 0.99976
- Points used
- 5
Fit method: linear least-squares on ln(Ith) vs. T (K). T0 = 1 / slope. I0 = exp(intercept). All data stays in your browser.
ln(Ith) vs. T — fit line
Parsed data
| T (°C) | T (K) | I_th (mA) | ln(I_th) | fit residual |
|---|---|---|---|---|
| 15.00 | 288.15 | 7.400 | 2.0015 | 4.47e-3 |
| 25.00 | 298.15 | 8.700 | 2.1633 | -5.59e-3 |
| 35.00 | 308.15 | 10.400 | 2.3418 | 9.95e-4 |
| 45.00 | 318.15 | 12.300 | 2.5096 | -3.11e-3 |
| 55.00 | 328.15 | 14.700 | 2.6878 | 3.23e-3 |
Methodology
For an explanation of the math, common pitfalls in T0 extraction, and a full worked example, see the article Extracting T₀ from temperature-dependent LIV measurements.