Frequency identification with frequency locker

摘要

An apparatus and a method is provided for frequency identification and laser locking by sending optical signals of a laser through a set of optical filters. The signal power transmitted by the filters is measured and the resulting set of powers normalized with respect to a reference power. The multidimensional measurement output curve of the set of filters is nondegenerate. The set of measurements is compared to a set of points in a calibration table or constellation, which results in the identification of the frequency of the laser.