VERTICAL CAVITY SURFACE EMITTING LASER (SEMICONDUCTOR LASERS) ECE 631. INSTRUCTOR: Prof. Celal Zaim Çil Reşat ŞEKER 2013. HOW IT WORKS: Homojunction Structures.
INSTRUCTOR: Prof. Celal Zaim ÇilReşat ŞEKER 2013
Semiconductor lasers are diodes which are electrically pumped. Recombination of electrons and holes created by the applied current introduces optical gain. Reflection from the ends of the crystal form an optical resonator, although the resonator can be external to the semiconductor in some designs.
Heterojunction Lasers (Quantum cascade Lasers)Electron and holes energies are quantized in the confinement direction (Z or thickness in this case) and continuous in other two directions
- Consists of quantum structures