What is the difference between PIN diode and Avalanche Photo diode?

Answer 1

ets see the comparison of LED Diode vs LASER Diode.

LED Diode :

-Full form of LED- light emitting diode.

-LED's are small in size, longer life, reliable and require little power.

-Here generation photon by spontaneous emittion.

-LED's produce a divergent and incohrent light beam.

-Types of LED 1> surface emitter and 2> Edge emitter.

-Their response is fast.

-A wide range of wavelengths is available.

-The cost of LED would be less.

-An intensity of generating light is less.

-Coupling efficiency of LED with fiber is less.

-LED's use with the multimode fibers.

-Bandwidth of led is moderate.

-In led have require no extra circuit because of its simple circuit.

-Here require drive current is 50 to 100mA.

LASER Diode :

-Full form of LASER - light emplification by stimulated emmition of radiation.

-Laser's are bigger in size, longer life, less reliable and require more power then LED.

-Here generating photon by stimulated emittion.

-Laser produce q monochromatic and coherent light beam.

-Types of Laser 1> semiconductor laser and 2> Gas laser.

-Their response is faster than LED.

-A small range of wavelength is available.

-The cost of Laser would be higher.

-Coupling efficiency of Laser with fiber is higher.

-Laser use with both single mode and multi mode fibers.

-Bandwidth of laser is higher.

-In laser have require extra circuit for isolation of temperature reaction.

-Here require drive current is Therashold current 5 to 40mA.