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Nonlinear Optics: SHG
Phase mismatch Δk:
0.00
mm⁻¹
Crystal length L:
5.0
mm
χ⁽²⁾ coupling d_eff:
1.0
QPM poling period:
OFF
Coherence length:
—
SHG efficiency:
—
Phase match:
—
Two photons ω→one at 2ω. Phase matching Δk=k(2ω)−2k(ω)=0 maximizes conversion. QPM reverses χ⁽²⁾ sign each coherence length via periodic poling.