A method for tuning a tunable optical transmitter in an optical WDM transmission system and corresponding optical WDM transmission system

摘要

Optical WDM transmission system including a plurality of first and second optical transceivers at a first and second end of an optical WDM transmission link. The first optical transceivers include tunable optical transmitters that create a first set of optical channels of the optical WDM transmission system according to a tuning control information. The second optical transceivers include an optical transmitter being adapted to create a second set of optical channels of the optical WDM transmission system. A central tuning device creates the tuning control information for one or more or all of the first optical transceivers by tapping off an optical WDM signal, extracting tuning status information and determining tuning control information for the first transceivers. The central tuning device supplies the tuning control information by modulating an optical WDM signal according to the tuning control information applying an amplitude modulation using a dedicated WDM tone frequency.