Abstract
One possible origin of the loss increase phenomenon with heat treatment at 200°C (H2 evolution from the coating material) has been investigated, using optical fibre coated with silicone resin containing the Si—D group. Although OH absorption at 1.4 μm increases with 200°C heat treatment, no OD peak is observed. It is suggested that silicone resin containing no Si—H and Si—CH2—CH2—Si groups is appropriate as a coating material as no H2 evolution is present.
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