Patent ID: 8798478
Filing Date: 2014-08-05
Classification: H01S,H04B,H04J

Abstract:
1. An optical transmission system in a passive optical network, comprising: a remote node comprising a first demultiplexer and an optical circulator coupled to the first demultiplexer; a central office comprising one or more injection incoherent light sources that generate one or more injection incoherent light signals, a second demultiplexer, and one or more optical receivers that are optically coupled at the output ends of the second demultiplexer; and optical circulator is optically coupled between the one or more injection incoherent light sources, the first demultiplexer and the second demultiplexer to separate the upstream signal delivered to the second demultiplexer from the first injection incoherent light signal delivered to the first demultiplexer.