Method for measuring group delay of optical frequencies, involves measuring optical spectrum by frequency sweep of pure sinusoidal electrical signal that is modulated in double sideband, narrowband phase or amplitude

摘要

The method involves measuring optical spectrum by frequency sweep of a pure sinusoidal electrical signal that is modulated in a double sideband, narrowband phase or amplitude. Phase differences introduced by a measuring device between frequencies are determined corresponding to upper sidebands. A source of high spectral purity optical signal is covered by tunable frequency sweep signal. The spectral purity optical signal and the tunable frequency sweep signal are modulated in amplitude or phase narrowband, and optical carriers are provided by a tunable optical source.