Chemical structures of the compounds used in this study with boiling point (b.p.) and refractive index.
(a) Schematic representation of vacuum apparatus used for making the glass ampoule. LN, liquid nitrogen; OF, organofluorine compound; S, seal after pumping; V, vacuum pump. (b) Illustration of the vacuum transportation method for sample preparation. V.T., vacuum transportation.
(Color online) Photographs of the optical media prepared in this study. (a) The medium prepared by treatment with EH measured . (b) Two samples were prepared by exposure to EH. The samples on the right and left measured and , respectively.
Temperature dependence of the dispersion depth of EH into PMMA after 24 h. PMMA used in the present study showed at 120 °C.
Dispersion depths of EH and PT plotted against treatment time. Treatment temperature was 150 °C. 엯, EH; ◻, PT.
(Color online) (a) Cross section of the sliced medium doped with PT at 110 °C for 48 h. The sample was transparent and the interface between doped and nondoped regions could be observed. (b) Mapping image for the concentration distribution of fluorine in the area surrounded by the white line in (a). (c) Line profile for the concentration distribution of fluorine along the white line shown in (b).
Schematic representation of the indices of the cladding layers.
Refractive indices of the cladding layers fabricated in the present study as a function of temperature. Treatment time was 24 h. 엯, EH; ◻, PT.
Refractive indices of the cladding layers fabricated in the present study as a function of treatment time. Treatment temperature was 150 °C. 엯, EH; ◻, PT.
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