| http://www.w3.org/ns/prov#value | - Such a resin is particularly used as a material for an optical waveguide because 1) it comprises both fluorene and epoxy acrylate units which allow the material to be deposited at a lower temperature while being heat resistant adequately to endure a photo-irradiation mounting process; 2) it exhibits a small light propagation loss at communication wavelengths of 1.3 and 1.55 ??m so that it is very
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