This document discusses the structure and classification of optical fibers. Optical fibers are classified based on the number of modes as either single-mode fiber or multi-mode fiber. The structure of an optical fiber communication system includes an information source, electrical transmitter, optical source, and optical fiber as the transmission medium. The optical source provides electrical-optical conversion, typically using a semiconductor laser or LED.

1. BY
K . MOUNIKA
16R21A0583

2. Contents:-
1.Introduction
2.What are optical fibers?
3.Evolution of optical fibers
4.Structure of optical fiber
5.Classification of optical fiber
6.Classification of optical fiber
7.Optical fiber communication system
8.advantages/disadvantages of
optical
fiber
9.Applications
10.conclusion

6. Structure of optical fiber

9.  Optical fiber is classified into two types .
They are:-
 1.Number of modes
 2.Refractive index
 Based on number of modes it is classified
into two types . They are:-
 1.Single Mode Fiber(SMF)
 2.Multi Mode Fiber(MMF)

12. Information source-It provides an
electrical signal to transmitter comprising
an electrical stage.
Electrical transmitter-It drives an optical
source to give an modulation of light wave
carrier.
Optical source-It provides the electrical-
optical.
 Conversion-It may be a semiconductor-
laser or an LED.