A small, single-frequency TE-C02 laser has been constructed and opel-ated under sealed conditions. Measurements indicate that an output energy of 15 mJ is obtained inn 45-ns (FWHM) 100-kW pulse followed by a 2-ps-long tail. Single-longitudinal-mode operation was obtained by the insertion of a 7.5 mm diameter iris into an 18-cm-long cavity. The discharge volume was I0 mm x I0 mm x 100mm. The laser was operated using a gas mixture containing H2:CO:C02:N2 in the proportions 20:30:250: 100 at ;I total of 54 kPa. Using this mixture over lo6 pulses have been obtained under sealed conditions. The frequency of the laser was controlled by locking it to a reference CW loczll oscillator using a computing-counter controlled feedback technique. Results of the experiments indicate the pulse-to-pulse standard deviation of the beat frequency to be f 500 kHz. the long term drift being controlled by the stabilization system.
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