Abstract
The nonlinear refractive index of the monoclinic biaxial nonlinear crystal BiB3O6 (BIBO) was measured at 1064nm for light polarization along the three principal optical axes using the single-beam z-scan technique. Strong anisotropy was observed with n2 values about two-times larger for polarization parallel to the Z-axis in comparison to the X-axis. BIBO exhibits lower nonlinear refractive index than KTP although its effective nonlinearity is larger.
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