| 摘要 |
For use particularly in a local splice monitor, a fiber optic coupler for coupling light into and out of an optical waveguide (31) without breaking the waveguide has a transparent body (12) through which a passage extends. The passage accommodates a waveguide and has an angled section (38) with the apex of the angle sufficiently sharp that light propagating along the waveguide (31) is emitted as a beam at the angled section (38). The light is detected by a photodetector (42). Alternatively, light from a light emitting source (29) is injected into the waveguide at the fiber angle (38). In another embodiment, the fibre is pressed by a transparent block so as to extend around part of the circumference of a cylindrical rod (see Figure 9 - not shown). <IMAGE> |
