What are the different pumping methods used in Laser diodes to achieve population inversion? Differentiate between LED and Laser diodes
In laser diodes, population inversion is achieved through different pumping methods that excite electrons in the active region to higher energy states, enabling stimulated emission. The common methods are:
1. Electrical Pumping: This is the most widely used method in laser diodes, where an electrical current is passed through ________ ______ _______ _________ ____.
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