High Duty Cycle Germanium Lasers and Continuous Terahertz Emission from Germanium
CALIFORNIA UNIV BERKELEY LAWRENCE BERKELEY LAB
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We have measured laser emission from beryllium-doped germanium crystals with small inter-contact distances. An improved heat sink allowed a two-fold increase of the laser duty cycle to 5. Non-thermal terahertz emission was found for conventional, continuously excited beryllium-doped germanium crystals with a volume of 0.5 cu mm. Experimental and theoretical investigations of germanium lasers headed for continuous wave operation will be discussed. Major emphasis is placed on the electric field uniformity. We present experimental results of lasers utilizing a planar contact geometry. A planar laser structure with a thin active layer seems to be a very good candidate for a high power and continuous wave terahertz laser.
- Lasers and Masers