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      Gratings in polymeric waveguides

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      Author(s)
      Mishakov, G.
      Sokolov, V.
      Kocabaş, Aşkın
      Aydınlı, Atilla
      Date
      2007
      Source Title
      Proceedings of SPIE Vol. 6613, Laser Optics 2006: Wavefront Transformation and Laser Beam Control
      Print ISSN
      0277-786X
      Publisher
      SPIE
      Volume
      6613
      Pages
      1 - 5
      Language
      English
      Type
      Conference Paper
      Item Usage Stats
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      92
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      Abstract
      Laser-induced formation of polymer Bragg grating filters for Dense Wavelength Division Multiplexing (DWDM) applications is discussed. Acrylate monomers halogenated with both fluorine and chlorine, which possess absorption losses less than 0.25 dB/cm and wide choice of refractive indices (from 1.3 to 1.5) in the 1.5 um telecom wavelength region were used. The monomers are highly intermixable thus permitting to adjust the refractive index of the composition within ±0.0001. Moreover they are photocurable under UV exposure and exhibit high contrast in polymerization. These properties make halogenated acrylates very promising for fabricating polymeric waveguides and photonic circuits. Single-mode polymer waveguides were fabricated on silicon wafers using resistless contact lithography. Submicron index gratings have been written in polymer waveguides using holographic exposure with He-Cd laser beam (325 nm) through a phase mask. Both uniform and apodized gratings have been fabricated. The gratings are stable and are not erased by uniform UV exposure. The waveguide gratings possess narrowband reflection spectra in the 1.5 μm wavelength region of 0.4 nm width, nearly rectangular shape of the stopband and reflectivity R > 99%. The fabricated Bragg grating filters can be used for multiplexing/demultiplexing optical signals in high-speed DWDM optical fiber networks.
      Keywords
      Bragg grating filters
      Fluorinated polymers
      Polymer waveguides
      Submicron index gratings
      Demultiplexing
      Dense wavelength division multiplexing
      Fluorine containing polymers
      Permalink
      http://hdl.handle.net/11693/27080
      Published Version (Please cite this version)
      http://dx.doi.org/10.1117/12.740028
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