Fiber Optics

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Fiber Basics

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Connectorizing optical fiber

Remember to practice safety when breaking fiber and handling broken ends: wear safety glasses and tape up ends

The following list discusses the highlights of connectorizing fiber. Consult Thorlab's Fiber Polishing and Connectorization Manual for a more complete description.

  • Strip coating from fiber, leaving 2-3 inches of bare fiber
  • Prepare epoxy (EpoTek 353ND, mixing ratio 10:1 A:B by weight)
  • Inject epoxy into connector
  • Insert bare fiber through ferrule and cure epoxy (20 min @ 120 C, or level 6 on our oven)
  • Use diamond tipped blade to score and cleave fiber just above epoxy bead
  • Hand polish tip until fiber is flush with epoxy
  • Polish using abrasion sheets and polishing puck: 30um (green), 6um (yellow), 3um (red), 1um (white)


Some useful fiber polishing pictures

insert epoxy in connector
polishing progression
perfect fiber polish
polishing picture guide
cleans vs dirty fiber connectors




























Other useful links:

Optical Fibers - Wikipedia

Double-Clad Fibers - Wikipedia

RP's Passive Fiber Optics Tutorial

RP's Fiber Amplifiers Tutorial

RP's Modeling of Fiber Amplifiers and Lasers Tutorial