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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 47, Iss. 28 — Oct. 1, 2008
  • pp: 5175–5181

Fabrication of a thermally actuated tunable grating and its application as a C O 2 laser beam profile analyzer

Mohammadreza Riahi, Hamid Latifi, and Ghazaleh Moghimislam  »View Author Affiliations

Applied Optics, Vol. 47, Issue 28, pp. 5175-5181 (2008)

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We propose a thermally actuated tunable grating for measuring the beam profile of a CO 2 laser. The grooves of a transmissive grating are filled with a liquid whose refractive index depends on temperature. A visible laser as a probe and a CO 2 laser as a heat source are illuminated on the grating. The CO 2 laser is absorbed, and depending on its beam profile, a temperature profile is induced on the grating. The refractive index of the heated liquid is changed, resulting in a change of efficiency of the grating for the probe laser. By using the 1st orders of diffraction in a 4 f imaging system, the beam profile of the CO 2 laser is imaged onto a CCD camera by the probe laser.

© 2008 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(050.5080) Diffraction and gratings : Phase shift

ToC Category:
Diffraction and Gratings

Original Manuscript: June 3, 2008
Revised Manuscript: August 18, 2008
Manuscript Accepted: August 23, 2008
Published: September 26, 2008

Mohammadreza Riahi, Hamid Latifi, and Ghazaleh Moghimislam, "Fabrication of a thermally actuated tunable grating and its application as a CO2 laser beam profile analyzer," Appl. Opt. 47, 5175-5181 (2008)

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