Optical Fiber

Question 1

Fiber communication

Answer 1

• Transmission by light
  
  • The visible spectrum
• No RF signal
  
  • Very difficult to monitor or tap
• Signal slow to degrade
  
  • Transmission over long distances

• Immune to radio interference - There’s no RF

Question 2

UPC vs. APC

Answer 2

• Controlling light-Laws of physics apply
• Return loss-Light reflected back to the source

• UPC (Ultra-polished connectors)
• Ferrule end-face radius polished at a zero degree
angle
• High return loss

• APC (Angle-polished connectors)
• Ferrule end-face radius polished at an eight degree
angle
• Lower return loss, generally higher insertion loss
than UPC