Access-node for optical networks with variable access wavelengths - uses laser light sources which emit light at wavelengths of optical network light of which can be modulated in user device

摘要

An access node (10) for optical networks having variable access-wavelengths, can be connected via a first optical light- guide (3.1-3.k) in each case to user devices (2.1-2.k) and via a second light-guide (4.1-4.m) to the optical network. The node includes light-sources (11.1-11.n), specifically lasers, especially laser arrays, which emit light at the wavelengths of the optical network, whose light can be modulated in the user devices (2.1-2.k). Optical couplers are provided in the node, especially first circulators (13.1-13.k) and/or directional couplers arranged between the light-sources (11.1-11.n) and the first light-guides (3.1-3.k).