Abstract
The spectral properties of waveguide resonators having a configuration known as Case I are analyzed and compared when the reflectors are mounted directly next to the waveguide and when one of them is moved to a considerable distance from the waveguide. The conditions are determined under which the frequency and mode selectivities are increased in waveguide lasers with a dispersive resonator. Experiments are reported on a waveguide CO2 laser in which hard selection of the vibrational?rotational transitions of the 10P and 10R branches took place; the continuous tuning range of the radiation frequency for 18 transitions was then 750 MHz. A study was made of a change in the form of the transverse laser radiation intensity distribution when the plane mirror was removed to a considerable distance from the waveguide.
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