General Information
2-2
Physical Characteristics of Optical Fiber for Fusion Splicing
Coating
coating
cladding
core
standard diameter
250 µm, 900 µm
material
acrylic resin, nylon
Cladding
standard diameter
125 µm
material
silica, Fluoro doped
silica, Titan-coated silica
Core
standard diameter
8 µm – 10 µm (SM)
50 µm
– 62.5 µm (MM)
material
Germanium doped
silica, silica
Fiber Transmission
Non-zero
Dispersion
shifted
Dispersion
shifted
Single
mode
Multi
mode
Transmitting capacity
superior
superior
high
low
Splice loss
high
high
middle
very low
Splicing ease
difficult
difficult
middle
easy
Physical Characteristics of Single-mode and Multimode Fiber
50/125 Multimode
62.5/125 Multimode
Singlemode
100/140 Multimode
Typical diameter of human hair
core transmits light
125um
50um
250um
cladding keeps optical signal
within core
125um
62.5um
250um
coating protects glass from
abrasion and ensures high strength
125um
9.5um
250um
140um
100um
250um
75um