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  • Title: UV waveguides light fabricated in fluoropolymer CYTOP by femtosecond laser direct writing.
    Author: Hanada Y, Sugioka K, Midorikawa K.
    Journal: Opt Express; 2010 Jan 18; 18(2):446-50. PubMed ID: 20173864.
    Abstract:
    We have fabricated optical waveguides inside the UV-transparent polymer, CYTOP, by femtosecond laser direct writing for propagating UV light in biochip applications. Femtosecond laser irradiation is estimated to increase the refractive index of CYTOP by 1.7 x 10(-3) due to partial bond breaking in CYTOP. The waveguide in CYTOP has propagation losses of 0.49, 0.77, and 0.91 dB/cm at wavelengths of 632.8, 355, and 266 nm, respectively.
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