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http://yadda.icm.edu.pl:80/baztech/element/bwmeta1.element.baztech-article-BPW7-0018-0052

Czasopismo

Optica Applicata

Tytuł artykułu

Fabrication of a 2D thermally tunable reflective grating for measuring a CO2 laser beam profile

Autorzy Riahi, M.  Latifi, H. 
Treść / Zawartość http://opticaapplicata.pwr.edu.pl/archive.php
Warianty tytułu
Języki publikacji EN
Abstrakty
EN 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.
Słowa kluczowe
EN tunable grating   laser beam profiler  
Wydawca Oficyna Wydawnicza Politechniki Wrocławskiej
Czasopismo Optica Applicata
Rocznik 2011
Tom Vol. 41, nr 3
Strony 735--742
Opis fizyczny Bibliogr. 9 poz.
Twórcy
autor Riahi, M.
autor Latifi, H.
  • Laser and Plasma Research Institute, Shahid Beheshti University, Evin, Tehran, Iran
Bibliografia
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[3] WONG C.W., JEON Y., BARBASTATHIS G., KIM S.-G., Analog tunable gratings driven by thin-film piezoelectric microelectromechanical actuators, Applied Optics 42(4), 2003, pp. 621–626.
[4] CHEN J., BOS P.J., VITHANA H., JOHNSON D.L., An electrooptically controlled liquid crystal diffraction grating, Applied Physics Letters 67(18), 1995, pp. 2588–2590.
[5] TRISNADI J.I., CARLISLE C.B., MONTEVERDE R., Overview and applications of grating-light--valve-based optical write engines for high-speed digital imaging, Proceedings of SPIE 5348,2004, pp. 52–64.
[6] RIAHI M., LATIFI H., MOGHIMISLAM G., Fabrication of a thermally actuated tunable grating and its application as a CO2 laser beam profile analyzer, Applied Optics 47(28), 2008, pp. 5175–5181.
[7] RIAHI M., LATIFI H., MADANI A., MOAZZENZADEH A., Design and fabrication of a spatial light modulator using thermally tunable grating and thin-film heater, Applied Optics 48(30), 2009, pp. 5647–5654.
[8] WEBER M.J., Handbook of Optical Materials, CRC Press, 2003.
[9] AI-QUN LIU, Photonic MEMS Devices Design, Fabrication and Control, MEMS Thermo-Optic Switches, CRC Press,Taylor and Francis Group, 2009, Chapter 3, pp. 89–129.
Kolekcja BazTech
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