The Natural Oscillations of an Ideal Resonator (Linear Theory)
For the sake of brevity, we shall define a resonator as an optical cavity in which there are no light-energy losses (with the exception of small diffraction losses) and no pumping; i.e., there is actually no active medium. The electromagnetic field in an ideal resonator is described by a linear wave equation. As we shall show in the subsequent chapters, in the case of a practical resonator the wave equation is nonlinear, and the nonlinearity vanishes as the light losses and excess above the threshold pump power tend to vanish. Thus, an ideal resonator is the limiting case of a practical resonator. The ideal resonator is approximated to varying degrees by the experimental conditions.†
KeywordsTransverse Mode Natural Oscillation Angular Spread Open Resonator Light Loss
Unable to display preview. Download preview PDF.