ARRAY AND METHOD FOR MONITORING THE PERFORMANCE OF DWDM MULTIWAVELENGHT SYSTEMS

摘要

The monitor utilizes either a narrow band, tunable band pass filter for the wavelength division multiplexed (DM) region. This is realized by an arrangement with a grid in a Littrow system with a multiple radiation passage, or by a purely electronic cross-correlator based on the principle of optoelectronic mixing. Preferably the grid in the Littrow arrangement is fitted both in Ebert's, as well as in Fastie's formation for multiple passage.