Injection-seeded internal-reflection-mode p-Ge laser exceeds 10W peak terahertz power

Injection seeding of a large active p-Ge laser crystal operating on total internal reflection modes is demonstrated with peak output power at the level of 40W in the 1.5–4.2THz spectral range. The improvement over traditional 1W axial mode p-Ge lasers is due both to spatially and temporally more efficient use of the available population inversion.