University:
American Baptist College
Course:
CSCI 3621 | Networking
Academic year:

2022
Views:

170

Pages:

1
Author:

esfredint7qo

LESSON 4 FIBER OPTIC COMMUNICATION SYSTEM FIBER OPTIC COMMUNICATION - technique of transmitting data from one location to another by transmitting infrared light pulses using optical fiber ✓ ✓ fiber optics transmission involves the transmission of signals in the form of light from one point to the other. fiber optic communication network consists of TRANSMITTING and RECEIVING CIRCUITRY, a LIGHT SOURCE, and DETECTOR DEVICES CHARACTERISTICS OF FIBER COMMUNICATION • Bandwidth • Smaller Diameter • Less Weight • Signal Transmission for Long-distance • Less Attenuation • Security of Transmission OPTIC OPTICAL FIBER IMPACT ON IOT • Quick Transmission Media • Data Security • no loss of data FIBER OPTIC VS. SATELLITE 3 BASIC ELEMENTS OF FOC ➢ Compact Light Source - 2 components are used as light sources: LIGHT-EMITTING DIODES (LEDS) and LASER DIODES 4 ➢ - Low loss Optical Fiber Optical fiber is a cable, which is also known as a CYLINDRICAL DIELECTRIC WAVEGUIDE made of low-loss material. ➢ Photo Detector PARTS OF FIBER OPTIC CABLE ➢ Core - runs all along the fiber cable’s length and offers protection by cladding. ➢ Cladding - an outer optical material that protects the core. - reflects the light back into the core ➢ Buffer - The main function of the buffer is to protect the fiber from damage ➢ Jacket - yellow = single-mode cable - orange = multimode 2 TYPES OF OPTICAL FIBERS ➢ ➢ Single-Mode Fibers: used to transmit one signal per fiber Multi-Mode Fibers: used to transmit many signals per fiber PHOTODETECTORS - Use to convert the light signal back to an electrical signal. - 2 types of photodetectors: PN and AVALANCHE Why Light is used Instead of Electricity? - light source has a single wavelength What is Dispersion in Optical Fiber Communication? - transmitting of the light signals once they transmit in a fiber 4 TYPES ➢ MODERN dissimilar modes will propagate at dissimilar group velocities ➢ MATERIAL the refraction index of the medium will change through wavelength ➢ WAVEGUIDE the refractive index will alter across the waveguide ➢ POLARIZATION MODE the waveguide includes two different refractive indices. FIBER used in urban areas High bandwidth Uses light signals Fiber Optic Cable transmission medium is fiber Low Installation Cost SATELLITE suitable for uneven terrains, badly connected regions Less bandwidth Uses electromagnetic signals Relay Station transmission medium is air High Installation Cost LIGHT-EMITTING DIODES (LEDS) - are complex semiconductors used to change the current from electrical to light. CHARACTERISTICS • Small size • High radiance • Emitting region is small • High Reliability • They can be changed at high speeds. ADVANTAGES COMMUNICATION • • • • • OF OPTICAL FIBER No Power loss Interference Size Speed Electromagnetic compatibility APPLICATIONS OF FIBER OPTIC COMMUNICATION • Broadcasting • Industries • Defense • Data Storage • Industrial/Commercial