发明名称 WAVELENGTH MULTIPLEX OPTICAL NETWORK
摘要 PURPOSE:To realize the wavelength multiplex optical network in which an allowable transmission loss is taken large by providing a demultiplexing means, an optical receiver and a multiplexing means to the network. CONSTITUTION:An optical signal subjected to wavelength multiplex is inputted to a demultiplexer/multiplexer 2 of each node. The demultiplexer/multiplexer 2 is integration of sections 2-2-2-9 having wavelength selectivity on an optical waveguide 2-1, the left half 2-2-2-5 of the demultiplxer/multiplexer 2 act like a demultiplexer demultiplexing optical signals whose wavelengths are lambda1-lambdan and the right half 2-6-2-9 act like a demultiplexer inputting the optical signals whose wavelengths are lambda1-lambdan to the optical waveguide similarly. Since all the input of the optical signal is not distributed but each wavelength is demultiplexed, a distribution loss being a problem when the optical distributer is in use is not caused. Thus, the allowable transmission loss is increased.
申请公布号 JPH04104634(A) 申请公布日期 1992.04.07
申请号 JP19900221237 申请日期 1990.08.24
申请人 HITACHI LTD 发明人 TAKAHASHI YASUSHI;TANAKA KATSUYA
分类号 H04B10/556;H04B10/07;H04B10/27;H04B10/275;H04B10/29;H04J14/02;H04L12/42 主分类号 H04B10/556
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