High-repetition-rate far-infrared p-Ge laser

Summary form only given. FIR/sub-mm laser emission (70 to 250 micron) from p-Ge in E /spl perp/ B fields is enhanced when Voigt configuration is used. We recently demonstrated that permanent magnets provide an easier realization of the Voigt configuration than do the traditional superconducting solenoids. We report here an additional advantage resulting from the relatively open permanent magnet architecture. Large Cu blocks can be pressed in contact with two faces along the full 5-cm length of the Ge rod. These blocks serve simultaneously as electrodes for the high-power electric pulses and as heat sinks.