Non-linear optics study of the samples which strongly diffuse the Gaussian beam
| Autor: | R. Miedzinski, I. Fuks-Janczarek |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
business.industry Gaussian Centroid Nonlinear optics 02 engineering and technology 021001 nanoscience & nanotechnology Laser 01 natural sciences Two-photon absorption Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention 010309 optics symbols.namesake Optics Position (vector) law 0103 physical sciences symbols Electrical and Electronic Engineering 0210 nano-technology business Beam (structure) Gaussian beam |
| Zdroj: | Optics & Laser Technology. 115:193-199 |
| ISSN: | 0030-3992 |
| DOI: | 10.1016/j.optlastec.2019.01.042 |
| Popis: | The Z-scan experiment is the fastest method to determine non-linear optical (NLO) coefficients of materials. Classic Z-scan technique described by Sheik-Bahae et al. (1989) and Wang et al. (1994) uses pulsed or CW lasers with the Gaussian beam profile. As long as the Gaussian profile is not diffused by the examined materials, this method can be used. However, by extending the classic Z-scan technique using a CCD beam profiler and analyzing the beam deviation from the Z axis, the NLO coefficients can be estimated even for a highly diffused Gaussian beam. The method proposed in this paper tracks the centroid position of the diffused beam and on this basis the two photon absorption coefficient β and the nonlinear refractive index n 2 are obtained. The accuracy depends on the samples geometry and the CCD detector used. The new approach presented in this paper can be used in substitution to the classic technique for the materials which strongly diffuse the Gaussian beam. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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