Sellmeier Equation Calculator
The Sellmeier equation provides accurate refractive index calculations across a wide wavelength range. Includes GVD, group index, and dispersion curve with preset glass material coefficients.
Inputs
Results
Refractive Index
1.518522
Group Index
1.546197
GVD
77.04 fs²/mm
Sellmeier Dispersion Curve (300–2000 nm)
Sellmeier Equation Results
| Parameter | Value |
|---|---|
| Refractive Index n(λ) | 1.518522 |
| Wavelength | 550 nm (0.5500 μm) |
| Group Index ng | 1.546197 |
| GVD (approx) | 77.04 fs²/mm |
| dn/dλ | -0.050318 /μm |
| Material | BK7 |
| B₁ | 1.03961212 |
| C₁ | 0.00600070 |
| B₂ | 0.23179234 |
| C₂ | 0.02001791 |
| B₃ | 1.01046945 |
| C₃ | 103.56065300 |
Frequently Asked Questions
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