Selectivity of dispersive resonators with arbitrarily located focusing and stopping components

A theoretical investigation is made of a dispersive resonator with a Gaussian stop, which simulates an active medium and is located in the vicinity of the common focus of a telescopic system. Relationships are obtained for describing the change in the spectral high-Q band as a function of the deviation of the resonator parameters. The influence of the telescopic nature of the dispersive element is studied. The results obtained are used to consider the possibility of continuous variation of the width of the emission spectrum of a pulsed laser and optimization of its energy characteristics.