This simple example demonstrates the SPS algorithm analysis of an optical ring modulator by using an Optical Network Analyzer (ONA).
INTERCONNECT frequency domain analysis of a circuit under test is performed by the ONA element, enabling the simultaneous analysis of multiple circuits in the same schematic. After the ONA runs the scattering data analysis of the circuit, a comprehensive set of measurements on the complex transmission spectra are calculated; typical results include gain, phase, dispersion and group velocity. Spectral peak analysis is also performed, which automatically calculates free spectral range (FSR), bandwidth, Q-factor, and other key parameters. The following figure shows the ring modulator's gain spectrum curve measured by the ONA and the peaks of the gain curve. The FSR of the ring could be directly perceived through the peaks of the gain spectrum.