OPTICAL SIGNAL TRANSLATOR UNIT

摘要

The invention is directed to an optical node, e.g., a so-called add/dro p site, that receives an optical carrier signal formed from a plurality of component optical signals of respective wavelengths and a plurality of different identification signals which identify respective ones of the wavelengths. As is typically the case, the node includes a demultiplexer tha t demultiplexes the optical carrier signal and outputs the demultiplexed component optical signals to respective optical paths. Disadvantageously, each of the demultiplexed optical component signals includes all of the identification signals as a result of such demultiplexing. However, we dispose an optical translator unit in at least one of the optical paths to remove all of the identification signals from the one component optical signals and also reset the power level of that signal. A transmitter in the translator unit outputs the latter signal as an optical signal in which the wavelength of th e outputted optical signal may be changed on an optional basis to a wavelength that is different from the wavelength of the one component optical signal.