Compara mètodes

	Z-scan	Òptica de Fourier
Camp	Òptica	Òptica
Família	Process / pipeline	Process / pipeline
Any d'origen	1990	1822
Autor original	Mansoor Sheik-Bahae, David Hagan, and Eric Van Stryland	Joseph Fourier and Ernst Abbe
Tipus	Measurement technique	Spectral decomposition method
Font seminal	Sheik-Bahae, M., Said, A. A., Wei, T. H., Hagan, D. J., & Van Stryland, E. W. (1990). Sensitive measurement of optical nonlinearities using a single beam. IEEE Journal of Quantum Electronics, 26(4), 760-769.	Goodman, J. W. (1968). Introduction to Fourier Optics. McGraw-Hill.
Àlies	Z-scan method, nonlinear refraction measurement	frequency-domain optics, wave optics, diffraction theory
Relacionats	3	3
Resum	The Z-scan technique is an experimental method for measuring nonlinear optical properties of materials, particularly third-order susceptibility and nonlinear absorption. Developed by Sheik-Bahae, Hagan, and Van Stryland in 1990, Z-scan uses a tightly focused laser beam and moves the sample along the beam propagation axis (z-axis), recording transmission variation to deduce nonlinear refraction and absorption coefficients with high sensitivity.	Fourier optics is a mathematical framework that analyzes optical systems and phenomena using Fourier transforms and frequency-domain methods. Grounded in Joseph Fourier's 1822 work on heat diffusion and Ernst Abbe's microscopy theory, this approach decomposes optical fields into plane waves or spatial frequencies, revealing how optical systems manipulate and filter these components to produce images and transmit information.