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Crosslinkable fluorinated hyperbranched polyimide for thermo-optic switches with high thermal stability

Authors

  • Zijian Cao,

    1. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
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  • Lin Jin,

    1. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
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  • Yu Liu,

    1. Alan G. MacDiarmid Institute, College of Chemistry, Jilin University, Changchun, 130012, China
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  • Zhenhua Jiang,

    1. Alan G. MacDiarmid Institute, College of Chemistry, Jilin University, Changchun, 130012, China
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  • Daming Zhang

    Corresponding author
    1. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
    • State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
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Abstract

A series of fluorinated hyperbranched polyimides (FHBPIs) were synthesized by condensation of a triamine monomer, 1,3,5-tris(2-trifluoromethyl-4-minopheoxy) benzene (TFAPOB) and various aromatic dianhydride monomers with different linear length for application on integrated optical devices. Near infrared absorption measurement shows that it has high transparency in optical communication wavelength region. The glass transition temperature and thermal decomposition temperature were 189°C and 596°C, respectively. According to the atomic force microscopy analysis, the surface roughness of the FHBPI films is 0.208 nm. A classic Mach–Zehnder interferometer thermo-optic switch with single mode waveguide fabricated by FHBPIs represents excellent switching characteristic. The rise time and fall time of this device are 530 µs for both. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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