| 摘要 |
A non-intrusive optical tap comprises a mating pair of transparent plastics members (11a, 11b) of substantially wedge- shaped cross-section and together defining a cylindrical cavity in which the fibre (13) is located. The tap applies pressure to the fibre 13 to induce microbending whereby coupling between bound and radiating modes is effected. This causes leakage of light from the fibre into the tap. The tap is inserted through a split in the sheath of a cable carrying the fibre and is self aligned to the fibre. <IMAGE> |
