Abstract
A far-infrared laser utilizing intersubband transitions of hot holes in germanium with a hole density of 2.5×1014 cm−3 is investigated in the Voigt and Faraday field configurations. New comparative data for both configurations are given on the field ranges in which lasing takes place, the emission intensity and spectra, and their dependence on the temperature of the crystal. The Voigt configuration is shown to be preferable, having a broader lasing field range, a higher working temperature, a richer emission spectrum, and a higher intensity. Prominent details of the laser characteristics are discussed, and a comparison is made with calculations.
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