Fiber Optics

1
Fiber Optics

• Seeing the light at the end of the tunnel.

2
Beginning Of Fiber Optics

• Swiss Physicist Daniel Colladon Recognized
• Light Guiding(1841)

3
How do They Work?

• Snells Law
• n1 sin(?1)n2 sin(?2)
• The speed and wavelength of light change when
  entering a different medium
• Index of Refraction (nc/v cspeed of light in
  vacuum)

4
Total Internal Reflection

• ?carcsin(n2/n1)
• light is to enter the second medium at an
  angle greater than critical angle for TIR to
  occur

5
sin ?max1/no(n12-n22)1/2 acceptance
angle
cladding index of refraction lower than core
index of refraction
6
(No Transcript)
7

• Visual Demonstration

8
(No Transcript)
9
Single-Mode and Multimode Fibers
10
Optical Fiber Sizes
11
Outside Vapor Deposition (OVD) Process

• Laydown

12
Outside Vapor Deposition (OVD) Process

• Consolidation

13
Outside Vapor Deposition (OVD) Process

• The Draw

14
Fiber Geometry Parameters

• Cladding Diameter

• Core/Clad Concentricity

• Fiber Curl

15
Fiber Optics in The 20th Century

• Telephone Systems
• Internet
• Video Feeds
• Medical Operations
• Home Theater Systems

16
Advantages

• Size
• Immune to Electromagnetic Interference
• Low Signal Loss
• Higher Carrying Capacity
• Non-Conductive

17
Disadvantages

• Different Signals
• New system required for Fiber Optics

18
References

• Hecht, Eugene. Optics.4th ed. 2002
• Hecht, Jeff. Understanding Fiber Optics. 4th ed.
  2002
• Mauldin, John H. Light, Lasers, and Optics. 1988
• www.sff.net/people/Jeff.Hecht/history.html
• www.fiber-optics.info/fiber-history.html
• www.howstuffworks.com/fiber-optic.htm