A far-infrared gas-discharge laser

One of the most expensive elements of the HCN laser is the resonator. The size of the laser is in principle determined by the size of the resonator. The resonator of the LF pumping laser used in medical studies includes a glass discharge tube with two soldered-in glass branch pipes with electrodes of excitation. Similar discharge tubes are used in lasers with direct current pumping. Using soldering when making the glass discharge tube is a shortcoming of these lasers since it raises a resonator cost and reduces its reliability because destruction of the discharge tube is most likely in places of soldering. Lasers with high frequency (HF) pumping need a more simple and reliable design of resonator. To eliminate the above-mentioned problems we used glass tubes without the branch pipes as a resonator.