Multiplexing of optical signals of different wavelengths - using wavelength selective element to identify signals for bidirectional transmission

摘要

An optical fibre transmission system (LWL) has signals with different wavelengths (L1,L2,L3) received by a wave length selective element (WE). The signals are partially transmitted and reflected (RL) onto the reflecting surface (SP) of a mirror. The wave length selective element can be in the form of a Fabry-Perot element, where the optical component (Lm) is selected on the basis of a specific angle of incidence (Am). Receivers (E1-E3) are located at specific intervals to detect the presence of components and so performs a demultiplexing operation. Signals from transmitters (S1-S3) can be multiplexed into the optical fibre in a inverse process. ADVANTAGE - Simple and compact method of multiplexed signal handling.