OPTICAL CHARACTERISTICS OF PULSED CAPILLARY GAS-LASERS WITH WAVE-GUIDE RESONATORS

A method is suggested for the calculation of the spatial distribution and coherency of pulsed capillary gas lasers with waveguide resonators . The results of the calculation show that the employment of waveguide Fabry-Perot resonators with internal mirrors for the formation of spa tially-coherent low-divergence radiation is reasonable unless the puls e duration is small relative to the formation time of stationary modes . In the case of short-pulsed lasers, a substantial difference between the observed optical characteristics and those predicted by the theor y of stationary modes is demonstrated theoretically and experimentally .