LED vs laser diode

LED	LASER DIODE
LED is termed as Light Emitting Diode	LASER Diode is also known as Light “Amplification by Stimulated Emission of Radiation”
Its driving current ranges from 50mA to 100mA	Its driving current ranges from 5mA to 40mA
Nature of emitting light is incoherent and consists of various colors	Nature of emitting light is coherent and monochromatic.
It has wide junction area during manufacturing	It has narrow junction area during manufacturing
Bandwidth lies in the range of 10 THz to 50 THz	Bandwidth lies in the range of 1MHz to 2MHz
Power to light conversion efficiency is approximately 20%	Power to light conversion efficiency is approximately 70%
Numerical aperture of the obtained light beam in LEDs is high.	Numerical aperture of the obtained light beam in LASER is extremely low as compare to LEDs.
It works on Electro-luminance principle	It works on Stimulated Emission principle
The LED is considered as the optical source for various crucial applications.	Laser diode is a semiconductor device which is similar to a light emitting diode (LED) as it directly converts electrical energy to light energy

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