Investigation of the feasibility of using a gas-filled ultrasonic cell for Q switching of cw CO₂ lasers

Anew method was developed for Q switching of cw CO₂ lasers, including those of the waveguide type. This method is based on the use of an intracavity ultrasonic cell causing refraction and containing the active medium itself (which is a gas mixture), air, or a specially selected gas with a high refractive index. The experimental results indicate that the method provides a promising practical means for the control of laser radiation by Q switching at frequencies of 10–250 kHz in those cases when there are restrictions on the use of intracavity optical Q switches.