@misc{Riahi_Mohammadreza_Fabrication_2011, author={Riahi, Mohammadreza and Latifi, Hamid}, contributor={Gaj, Miron. Redakcja and Urbańczyk, Wacław. Redakcja}, year={2011}, rights={Wszystkie prawa zastrzeżone (Copyright)}, publisher={Oficyna Wydawnicza Politechniki Wrocławskiej}, description={Optica Applicata, Vol. 41, 2011, Nr 3, s. 735-742}, language={eng}, abstract={In this article, application of a 2D thermally tunable reflective grating for measuring the beam profile of a CO2 laser is proposed. A 2D grating is first fabricated on a glass substrate by conventional lithography technique. The grooves of the grating are filled with nitrobenzene, the refractive index of which highly depends on temperature. A double side polished silicon wafer is then placed on the grating. If a CO2 laser is incoming from silicon side, a portion of it is transmitted and absorbed in the grating structure. Depending on the beam profile of the CO2 laser, a temperature profile is produced on the grating causing the same profile for efficiency of the grating for a visible light. The changes in the efficiency, cause changes in intensity of dif-fraction orders. By measuring the intensity of the first order of diffraction, the beam profile of the CO2 laser is imaged on a visible CCD camera.}, title={Fabrication of a 2D thermally tunable reflective grating for measuring a CO2 laser beam profile}, type={artykuł}, keywords={optyka, tunable grating, laser beam profiler}, }