Abstract
The Z-scan1 has been widely used to measure optical nonlinearities including the nonlinear refractive index, π2. For the Z-acan technique, the laser is focused and an aperture is placed in front of a detector positioned in the far field. The transmittance is then measured as a function of the position of the sample with respect to the beam waist (i.e., with respect to Z).
© 1993 Optical Society of America
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