Millimeter-Wave Band Multi-Mirror Open Resonator. E- and H- Polarized Oscillations

This work provides the experimental research results of E- and H-polarized oscillations of the complex multi-mirror open resonator (OR) , one of the mirrors of which is represented by the echelette reflective grating. The essential difference between the spectra of E- and H- polarized oscillations of complex open resonator (COR) is noted. It is evident that within the range of measurements performed for the H-polarization, only one oscillation mode is excited while in the case with the E-polarization there are excited several of such modes. In this case the self-collimation reflection from the echelette grating determines the conditions for excitation of the OR, which condition is the dispersive element forming up the OR spectrum. Some functional capabilities implied by the design of the suggested multi-mirror open resonant system are also discussed. The suggested multi-mirror open resonant system can find wide application in millimeter-wave band electronics for frequency stabilization of the electron-vacuum and solid-state devices.