Chp 21 - Optical Fiber Construction and Theory Flashcards
What are the 3 components of Optical Fiber?
Core, Cladding, Coating
Define Core?
Smallest in size usually 9, 50, or 62.5. Carries light through the fiber. Impurities added during manufacture to control refractive index
Define Cladding?
Surrounds and protects the core. Provides lower refractive index than the core for total internal reflection. Typical diameter – 125m
Define Coating?
Made of plastic or acrylate. Protects the core/cladding.
Does not carry light Typical diameter – 250 m
What si the ANSI/TIA/EIA-568-C.3 standard for core/cladding for Single-mode?
Single-mode 9/125 um
What si the ANSI/TIA/EIA-568-C.3 standard for core/cladding for Multimode (European)?
Multimode 50/125 um
What si the ANSI/TIA/EIA-568-C.3 standard for core/cladding for Multimode (United States)?
Multimode 62.5/125 um
Define Glass Fiber?
Glass core and cladding. High data rates/long transmission distances. Long distance data and telecommunication
Define Plastic Clad Silica?
Glass core, plastic cladding.
Rugged high performance for short distance. Industrial controls, automobile, home networks.
Define Hard-clad silica?
Glass core hard polymer cladding. Ruggedness is prime consideration. Manufacturing / Airplanes.
Define Plastic Fiber?
Plastic core/cladding. Low cost and durable, ease to use. Industrial controls, home entertainment.
Define Tensile Strength?
Defined as amount of stretching fiber can withstand. Decreases as the fiber is bent. Nicks and cuts in the fiber greatly decrease tensile strength.
Explain Modified chemical vapor deposition (MCVD)?
Vaporized silicon dioxide is introduced into the tube.
Explain Outside vapor deposition (OVD)?
Like MCVD, but the core is made first, after the core is thick enough the classing is added.
Explain Vapor axial deposition (VAD)?
Like OVD, but heated vertically
