LIGHT WAVELENGTH MULTIPLEXER AND DEMULTIPLEXER FOR BIDIRECTIONAL

摘要

A bidirectional optical wavelength multiplexing-demultiplexing device comprises a self-focusing lens having an index gradient and situated between the transmission fibre and filtering means and of which the length is such that the spatial separation between the outgoing wavelengths and the return wavelength is maximum, which permits decoupling of the return channel from the outgoing channels.