Abstract
Mid-infrared vertical external cavity surface emitting lasers (VECSELs) for in wavelength have been realized. The active parts are of a simple structure, either a thick PbTe gain layer or two PbTe layers embedded in barriers. Epitaxial 2.5 pair Bragg mirrors are employed to form the cavity, and an Al layer is deposited for improved heat dissipation. Emission up to is observed with microsecond pulses or cw at is obtained. Quantum efficiency is up to 14%, and lasing occurs up to when pumped with a wavelength pump laser.
© 2008 Optical Society of America
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