Patent ID: 7146071
Filing Date: 2006-12-05
Classification: H04B

Abstract:
1. An optical transmission system for branching optical signals to allow the optical signals to be communicated among at least three stations or more, comprising: a branch station for performing non-repeated optical communication with an optical branching point, said branch station including a light pumping section for causing pump light to enter an optical fiber through which a branched, receiving optical signal flows, to perform optical amplification by using the optical fiber as an amplification medium; and an optical branching device including an optical amplification section for redirecting the pump light originated from said branch station and propagated through a line to a paired line through which an optical signal transmitted from said branch station flows, to excite an amplification medium inserted in the paired line and doped with an active material for optical amplification and thereby amplify power of the optical signal transmitted from said branch station, and an optical branching section for branching the optical signal transmitted from said branch station as well as optical signals transmitted from other stations.