Integrated optical analogs of classical interferometers

An analysis is made of the modulation and filtering properties of planar analogs of multistage Mach–Zehnder and Fabry–Perot interferometers. It is shown that the best parameters are exhibited by a modulator or a filter in the form of a series of planar Mach–Zehner interferometers with a nonlinear dependence of the phase of the control signal on the stage number. A planar Fabry–Perot interferometer is characterized by the smallest capacitance of the control plates.