Basic Principles of Light Emission in Semiconductors
This chapter is the first in a sequence of four chapters that describe the light sources used most often in integrated-optic applications. Because of their convenience, gas lasers are frequently used in the laboratory to evaluate waveguides or other integrated-optic devices; however, semiconductor lasers and light-emitting diodes are the only practical light sources for use in optical integrated circuits, due to their small size and compatibility with monolithic (or hybrid) integration. Also, LED’s and laser diodes are widely used in fiberoptic applications, because they can be modulated at high frequencies and can be efficiently coupled to the micrometer-size wave-guiding core of the fiber.
KeywordsConduction Band Valence Band Light Emission Spontaneous Emission Semiconductor Laser
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