| 摘要 |
<p>An intrusion-alarmed optical fiber communication system, where light from two or more sources are launched with a planar channel waveguide launcher (1) into two or more modes of a multimode graded-index transmission fiber, is disclosed. Input fibers (11, 13, 15) containing the source light waves and the output fibers (17, 19, 21) are in direct contact with the waveguide channels (3, 4, 5, 7, 8). Waveguide channels redistribute the light from the input channels (2, 5, 6) to output channels (3, 4, 5, 7, 8) by rerouting, crossing, merging, and splitting channels. Waveguide launcher precisely launches data light into the fundamental mode and intrusion monitor light into high order modes of a multimode graded-index fiber. Fiber intrusion attenuates light in high order modes, but less of the data in the fundamental mode, thereby forming a basis for the intrusion-alarmed system. Waveguide channel configuration permit other versatile functions such as optical time domain reflectometry and channel feedback stabilization of the diodes.</p> |
