A semiconductor laser is a device that causes laser oscillation by flowing an electric current to semiconductor. The mechanism of light emission is similar to a light-emitting diode. Light is generated by flowing the forward current to a p-n junction. When a p-n junction diode is forward biased, the electrons from n – region and the holes from the p- region cross the junction and recombine with each other. During the recombination process, the light radiation (photons) is released from a certain specified direct band gap semiconductors like Ga-As. The material which often used in semiconductor laser is the gallium arsenide, therefore semiconductor laser is sometimes known as gallium arsenide laser. The applications of this are extremely widespread and include optical telecommunications, optical data storage, metrology, spectroscopy, material processing, pumping of other lasers, and medical treatments. The presentation can be promising. Please take a look.

Nithya N Prabhu

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