| Abstract: | This paper describes a CW submillimeter waveguide discharge‐pumped DCN laser operating on 190 and 195μm lines with novel mixture gas(N2, CD4, and D2). No brown polymer deposit was found after long time discharge even at low wall temperature. The laser discharge length is 3 m, and the resonator length is 3.4 m. The resonator cavity consists of a pyrex tube of 54 mm diameter and two plane reflectors against its ends, one is a plane mirror, the other is a metal mesh. After optimization of various parameters, such as the N2:CD4:D2 gas mixture, the discharge current and the wall temperature, this laser delivers 150 and 160mW on the 190 and 195μm lines, respectively, for EH11 mode. |
