Z-Scan Technique
Nonlinear Refractive Index
Calculator (n₂)
Closed-aperture Z-scan method
k = 2π / λ · ΔΦ =
ΔT(p-v)
/ [0.406 × (1 − s)] ·
n₂ = ΔΦ / (k · I · L_eff)
INPUT PARAMETERS
WAVELENGTH λ
nm
LASER INTENSITY I
W/m²
EFFECTIVE LENGTH L_eff
m
APERTURE FRACTION s
dimensionless (0 – 1)
ΔT(p-v) — PEAK-TO-VALLEY TRANSMITTANCE CHANGE
dimensionless
Calculate →
↺
NONLINEAR REFRACTIVE INDEX
—
m²/W
SCIENTIFIC NOTATION
—
1
WAVE NUMBER k = 2π / λ
—
2
PHASE SHIFT ΔΦ = ΔT(p-v) / [0.406 × (1 − s)]
—
3
n₂ = ΔΦ / (k · I · L_eff)
—
INPUT SUMMARY
λ
—
I
—
L_eff
—
s
—
ΔT(p-v)
—