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List at least three applications of semiconductor laser diodes. Discuss one of the applications in some...

List at least three applications of semiconductor laser diodes. Discuss one of the applications in some details, including demands and further improvement needed for the laser diode technology.

Science   Advanced-Physics   
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Ordinary light source contains all the spectrum o flight. On the other way. Laser has narrow bandwidth having large coherent length. It has very low power loss. Nowadays semiconductor Laser diodes are used for producing laser beams. Laser is an acronym for light amplification by stimulated emission of radiation. Generally gallium arsenide is used for semiconductor laser diodes it produces light waves in the infrared region . gallium arsenide is sandwiched between and P and N type semiconductor , so that

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