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
- 59.6 K
- I0
- 0.054 mA
- R²
- 0.99992
- Points used
- 5
Fit method: linear least-squares on ln(Ith) vs. T (K). T0 = 1 / slope. I0 = exp(intercept). Runs entirely in your browser. Nothing you enter is uploaded or stored.
ln(Ith) vs. T with fit line
Parsed data
| T (°C) | T (K) | I_th (mA) | ln(I_th) | fit residual |
|---|---|---|---|---|
| 15.00 | 288.15 | 6.800 | 1.9169 | 2.29e-3 |
| 25.00 | 298.15 | 8.000 | 2.0794 | -3.01e-3 |
| 35.00 | 308.15 | 9.500 | 2.2513 | 1.03e-3 |
| 45.00 | 318.15 | 11.200 | 2.4159 | -2.17e-3 |
| 55.00 | 328.15 | 13.300 | 2.5878 | 1.87e-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.