Abstract : a device that converts electrical signal into optical signal is called optical transmitter.
•Lasers
–Fabry-Perot Lasers (FP)
–Distributed Feedback Lasers (DFB)
–Vertical Cavity Surface Emitting Lasers (VCSEL)
–ASE fiber laser

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•Light Emitting Diodes (LED)
–Surface-Emitting LED (SLED)
–Edge-emitting LED (EELED)

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