what is the main difference between laser and laser diode
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The significant difference between LED and LASER lies in the working principle. LED emits light as the consequence of charge carriers recombination across P-N Junction, while LASER emits light as a result of photons striking the atom and compels them to release the similar photon. A laser works on the principle of stimulated emission and LED works on the principle of Electro-luminance.
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LED LASER
LED LASERLED - Light emitting diode
It is polychromatic
It is not coherent It
Spontaneous emission is responsible for it.
LASER - Light amplification by stimulated emission of radiation
LASER - Light amplification by stimulated emission of radiationI It is highly monochromatic
It is highly monochromaticIt is highly coherent
Spontaneous emission is responsible for it.
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