Improved excitation techniques for atmospheric pressure CO ₂ lasers

A study of uv preionization pulsed tea CO2 laser

“…As listed in Table 1, the efficiency of our laser system is 5.9%. The efficiency for converting the electrical energy into laser output is strongly dependent on the value of the E/N ratio of the glow discharge [15,18,19]. The ratio of the electric field to the neutral particle density E/N of our laser system is about 7.6xlO" e V cm 2 .…”

“…In a pulsed TEA laser, these effects have been overcome by *To whom all correspondence should be addressed. establishing a preionization background plasma prior to the main discharge and by operating at a relatively low ratio of electric field E in the plasma to the neutral gas number density N. Examples of these methods are the double discharge [14,15] and the electron beam preionizer sustainer [2,6,8] laser configurations; both have provided significant improvements in CO¿ laser performance with respect to laser efficiency, volumetric energy extraction, optical beam quality, and total output energy. Photoionization has been demonstrated to te an important mechanism in the operation of certain double discharge TEA lasers and can improve the output power of TEA CO2 lasers [4,5,11,20,21].…”

Controlled multiline CO2 oscillator

“…The laser construction on which the experiments were performed was a LambertonPearson type [5] with trigger-wires and Rogowskiprofiles. The electrode spacing was 17 mm.…”

High-repetition-rate closed-cycle rare gas electrical discharge laser

“…9 The ultrahigh-vacuum properties of the CCRGEDL system result in a very low contamination rate of the laser medium, which is of critical importance in the case of rare gases. S -8 The present paper describes the result of such an application-a fast-flow, high-pressure laser system capable of long-duration closed-cycle operation with atomic gases.…”