Capacitive-mesh output couplers for optically pumped far-infrared lasers.

Terahertz Behavior of Optical Components and Common Materials

As short range, ground based, surveillance systems operating at terahertz frequencies continue to evolve, increasing attention is being directed towards the behavior of dielectric materials at terahertz frequencies as well as the behavior of optical components used to control terahertz radiation. This work provides an overview of several terahertz optical components such as frequency selective ...

Very Short Far-Infrared Pulses from Optically Pumped CH30H/D, CHsF, and HCOOH Lasers Using an EO-Switched

Pressure effects on the frequency of continuous-wave optically pumped far-infrared lasers.

The frequency of the 170.6-microm cw CH(3)OH optically pumped laser emission has been remeasured at different pressures without observing the pressure shift observed by Lawandy and Koepf [Opt. Lett. 5, 383 (1980)]. The far-infrared frequency was synthesized with two stabilized CO(2) lasers. No measurable pressure shift over the operating pressure range of the laser was observed, and the frequen...

Fabrication and optimization of uniform output couplers for far-infrared lasers.

An improved technique for the fabrication of uniform output couplers for far-infrared lasers has been developed. The technique includes a process for uniformly removing material from the back side of the coupler's substrate to tune the coupler's reflectivity precisely to the specified value for a particular laser line. Depending on the condition of the coupler after use, it can be retuned to an...

Application of Advanced Millimeter/ Far-infrared Sources to Collective Thomson Scattering Plasma Diagnostics

The application of advanced millimeter/far infrared sources to substantially improve the effectiveness of collective Thomson scattering plasma diagnostics is discussed. Gyrotrons, C02 lasers and far infrared lasers which are optically pumped with CO 2 laser radiation can now provide important new capabilities in terms of combined high peak power and high average power, fine frequency tunability...