Fiber Optic Cables and Connectors

1. Major Advantabe of Fiber Optic cable
   • complete electrical isolation
   • immunity from hazards such as lightening strike
   • effect by different level of electrical ground
2. CAUTION : beware of looking directly into any fiber optic cable
3. Fiber Optic Core Diameters
   1. MMF : 62.5um fiber optic core and 125um outer cladding (62.5/125) --> 50/125
   2. SMF : 8~10/125
4. Fiber Optic Mode
   1. MMF : LED Source 
      • Use laser into MMF --> cause DMD(Differential Mode Delay) --> use VCSEL(Vertical Cavity Surface Emitting Laser) 
   2. SMF : Laser Source
5. Fiber Optic Bandwidth
   1. The distance over MMF is affected by
      • Signal strength
      • Signal Jitter
      • Dispersion
   2. Bandwidth(aka... bandwidth-distance)
      • purpose : characterize the effects of dispersion
      • OM(Optical Multimode) :  LED - OM1/OM2, VCSEL-OM3/OM4
6. Fiber Optic Connectors
   1. ST(straight tip) -  round , AT&T
   2. SC(Subscriber connector) - NTT
   3. LC(Lucent contctor) - Lucent,  half the space of SC
7. Fiber Optic Color Codes
   1. Connector plug body
      • Multimode : beige
      • Singlemode : blue
      • APC(Angle Polished Contact) single mode : green
   2. Fiber jacket color code
      • OM1/OM2 : Orange
      • OM3/OM4 : Aqua
      • single mode : Yello
8. MPO Connectors
   1. MPO : Multifiber Push-On