Calculate two-photon absorption coefficient (β) from wavelength, intensity, and pulse duration. Essential tool for microscopy, photodynamic therapy, and laser research.
Calculates the two-photon absorption coefficient (β) from your laser parameters. Enter wavelength, peak intensity, and pulse duration to estimate how efficiently your material absorbs two photons simultaneously.
β = K × (I × τ) / λ²
Where:
The wavelength of the incident light (400-1200 nm is typical)
The intensity of the incident light (typically 10¹⁰ to 10¹⁴ W/cm²)
The duration of the light pulse (typically 10-1000 fs)
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