| 摘要 |
<p>Optical fiber cladding compositions, based on highly fluorinated monofunctional acrylates, yield hard clad fibers that have attenuations often below 10 dB/km and whose temperature behavior is superior to silicone plastic clad silica (PCS). The numerical aperture (NA) of the fiber can be varied by selecting a particular composition. The main components of the composition are (1) a highly fluorinated monofunctional acrylate with a refractive index below 1.38; (2) a trifunctional or higher acrylate that serves as a crosslinking agent; (3) a mono or polyfunctional thiol that functions as a synergist; and (4) a photoinitiator such as an ultraviolet (UV) initiator. These components can be varied relative to one another over a wide range, but the fluoroacrylate must always be the major component. Where the fluoroacrylate is a solid at room temperature, a small amount of solvent like di-isobutyl ketone or methylene chloride can be added.</p> |
