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Optical Analysis of Diffraction Grating and Fresnel Zone Plate Fabricated on Fused Silica Glass by a Femtosecond Laser  

Ryu, Jin-Chang (Department of Photonic Engineering, Chosun Univ.)
Kim, Jin-Tae (Department of Photonic Engineering, Chosun Univ.)
Sohn, Ik-Bu (Precision Optics Lab., Advanced Photonics Research Institute, GIST)
Publication Information
Journal of the Korean Society for Precision Engineering / v.27, no.3, 2010 , pp. 18-26 More about this Journal
Abstract
Diffraction gratings with precise spatial periods of 2 ${\mu}m$ and 5 ${\mu}m$ have been fabricated by using a femtosecond laser which does not have limits on materials of micromachining and small thermal effects due to high peak power. Diffraction angle and diffraction efficiency of those were measured. Simulation results of diffraction angle and diffraction efficiency of the diffraction grating calculated with the parameters such as line width, depth, and spatial period of the fabricated gratings were compared with experimental results measured with a He-Ne laser. Besides these, Fresnel Zone Plates (FZPs) with focal distances of 50 mm and 25 mm were fabricated and focal distances of fabricated FZP were measured. Those experimental results for diffraction gratings and FZPs match well with experimental results.
Keywords
Femtosecond Laser; Direct Fabrication; Micropatterning; Diffraction Grating; Fresnel Zone Plate;
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Times Cited By KSCI : 1  (Citation Analysis)
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