4. Glossary
Prohibited zone; gap
The energy range within which no electronic states can exist in a crystalline solid. It is the energy gap between the valence band and the conduction band.
Optical cavity
A system consisting of two or more mirrors arranged in such a way as to confine and cause light to resonate between them through multiple reflections.
Laser diode
It is a P-N junction diode that, when a sufficient electric current flows through it, produces stimulated emission of photons within a resonant cavity, thereby generating an amplified, directional beam of light with a precise wavelength.
Population inversion factor
It depends on the properties of the gain medium. It allows one to assess the degree of population inversion...
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Glossary
Acronyms, abbreviations, and symbols
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