Two-directional optical communication equipment on single transmission line
专利汇可以提供Two-directional optical communication equipment on single transmission line专利检索，专利查询，专利分析的服务。并且PURPOSE: To reduce the entire cost of a system by using a polarized beam splitter to a directional coupler so as to eliminate a nearby reflection caused by using a single transmission line thereby attaining the single transmission line two-way long distance optical communication simply at low cost.
CONSTITUTION: A transmission data DO fetched synchronously with a transmission cock CKT from an interface circuit 90 is sent to an optical transmission circuit 20, after the data is subject to electrooptical conversion by a light emitting element 23 and the result is outputted to a directional coupler 10. The transmission light signal is subject to polarization and branching by the directional coupler 10 employing a polarized beam splitter 11, the result is made incident in an optical fiber 100 and sent to an opposite communication equipment (B station). The reflected light reflected at nearby end (end a) of the optical fiber 100 preserves polarization, then the light is eliminated by the polarization beam splitter 11 and does not enter the photodetective element 31. However, the light reflected at a remote end (end b) of the optical fiber 100 and the signal light from a station B are subject to be in non-polarized state because they are propagated in the optical fiber and led to the photodetector 31 in an optical reception circuit 30 through the beam splitter 11.
COPYRIGHT: (C)1987,JPO&Japio，下面是Two-directional optical communication equipment on single transmission line专利的具体信息内容。
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