twisted-pair cable twisted-pair wire
plastic outer coating
woven or braided metal
insulating material
copper wire
protective coating
glass cladding
optical fiber core
Optical FiberOptical Fiber
An optical fiber is a thin (2 to 125µm), f...
Optical FiberOptical Fiber
The basic question is
“how much information is to be sent and how far does it have
to go?”
Five...
Basic fiber optic communication systemBasic fiber optic communication system
Transmission WindowsTransmission Windows
• Optical fiber transmissions uses wavelengths in the near
infrared portion of th...
Fiber Optic Loss CalculationsFiber Optic Loss Calculations
Fiber Optic TypesFiber Optic Types
• Step-index multimode fiberStep-index multimode fiber
– the reflective walls of the fi...
Optical Fiber Transmission CharacteristicsOptical Fiber Transmission Characteristics
Optical Fiber Transmission Modes
Optical Fiber Transmission CharacteristicsOptical Fiber Transmission Characteristics
Step-index multimode fiber has an index of refraction profile that “steps” from
low to high to low as measured from claddi...
Components - Optical Fiber CableComponents - Optical Fiber Cable
Components - Optical Fiber CableComponents - Optical Fiber Cable
Indoor Optical Fiber CableIndoor Optical Fiber Cable
Outdoor Optical Fiber CableOutdoor Optical Fiber Cable
Next Lecture TopicsNext Lecture Topics
Topics include,
•Dispersion in optical fiber
•Multiplexing
•Fiber Optic Sources
•Fi...
Communication systems v6  a fter midz
Communication systems v6  a fter midz
Communication systems v6  a fter midz
Communication systems v6  a fter midz
Communication systems v6  a fter midz
Communication systems v6  a fter midz
Communication systems v6  a fter midz
Communication systems v6  a fter midz
Communication systems v6  a fter midz
Communication systems v6  a fter midz
Communication systems v6  a fter midz
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Communication systems v6 a fter midz

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Communication systems v6 a fter midz

  1. 1. twisted-pair cable twisted-pair wire
  2. 2. plastic outer coating woven or braided metal insulating material copper wire
  3. 3. protective coating glass cladding optical fiber core Optical FiberOptical Fiber An optical fiber is a thin (2 to 125µm), flexible medium capable of guiding an optical ray. Preferable because of, • Large bandwidth, light weight, and small diameter • Nonconductivity (no EMI & RFI) • Longer distance signal transmission with lesser attenuation • Security & greater repeater spacing • Designed for future applications needs
  4. 4. Optical FiberOptical Fiber The basic question is “how much information is to be sent and how far does it have to go?” Five basic categories of application have become important for optical fiber: • Long-haul trunks • Metropolitan trunks • Rural exchange trunks • Subscriber loops • Local area networks
  5. 5. Basic fiber optic communication systemBasic fiber optic communication system
  6. 6. Transmission WindowsTransmission Windows • Optical fiber transmissions uses wavelengths in the near infrared portion of the spectrum • Both Lasers and LEDs are used to transmit light through fibers • Lasers are used for 1310 nm or 1550 nm single mode transmissions • LEDs are used for 850- or 1300 nm multimode applications
  7. 7. Fiber Optic Loss CalculationsFiber Optic Loss Calculations
  8. 8. Fiber Optic TypesFiber Optic Types • Step-index multimode fiberStep-index multimode fiber – the reflective walls of the fiber move the light pulses to the receiver • Graded-index multimode fiberGraded-index multimode fiber – acts to refract the light toward the center of the fiber by variations in the density • Single mode fiberSingle mode fiber – the light is guided down the center of an extremely narrow core Three basic types of optical fibers are used in communication systems
  9. 9. Optical Fiber Transmission CharacteristicsOptical Fiber Transmission Characteristics Optical Fiber Transmission Modes
  10. 10. Optical Fiber Transmission CharacteristicsOptical Fiber Transmission Characteristics
  11. 11. Step-index multimode fiber has an index of refraction profile that “steps” from low to high to low as measured from cladding to core to cladding. Relatively large core diameter and numerical aperture characterize this fiber. The core/cladding diameter of a typical multimode fiber used for telecommunication is 62.5/125 μm (about the size of a human hair). The term “multimode” refers to the fact that multiple modes or paths through the fiber are possible. Stepindex multimode fiber is used in applications that require high bandwidth (< 1 GHz) over relatively short distances (< 3 km) such as a local area network or a campus network backbone. Step-index multimode fiber
  12. 12. Components - Optical Fiber CableComponents - Optical Fiber Cable
  13. 13. Components - Optical Fiber CableComponents - Optical Fiber Cable
  14. 14. Indoor Optical Fiber CableIndoor Optical Fiber Cable
  15. 15. Outdoor Optical Fiber CableOutdoor Optical Fiber Cable
  16. 16. Next Lecture TopicsNext Lecture Topics Topics include, •Dispersion in optical fiber •Multiplexing •Fiber Optic Sources •Fiber Optic Detectors •Fiber Optic System Design Considerations

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