FA1000-62-85A1-0024A Datasheet, PDF (10/18 Pages) Glenair, Inc. – The Glenair Eye-Beam™ Fiber Optic Revolution

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Fiber Optic Illustrated Glossary continued
Ferrule  A small alignment tube attached to the end of the fiber and used
in connector termini. Generally made of stainless steel, ceramics, or
zirconia, the ferrule is used to confine and align the stripped end of
the fiber.
Ferrule
Fresnel Reflection Loss  Reflection losses incurred at the input and
output points of optical fibers due to the difference in refractive index
between core glass and immersion media.
Air gap - di erent
refractive index
Re ection loss
Gap Loss  Loss resulting from the end separation of two axially aligned
Light In
fibers.
Light lost from Gap
Light lost from Gap
GRIN  Abbreviation for GRadient INdex. This type of multimode fiber uses
a core in which the refractive index gradually decreases from the
center of the fiber out toward the cladding. Light rays moving down
the center axis advance more slowly than those near the edge, which
take a helical curved path, shortening their travel distance. The faster
rays at the edge of the fiber arrive closer together with the slower rays
from the center, allowing for a signal with less dispersion.
-
Refractive ₊
Index
-
SLOWER
FASTER
FASTER
Insertion Loss  Attenuation caused by the insertion of an optical
component; in other words, a connector terminus or coupler in an
optical transmission system.
Input
Output
Coupler
Insertion Loss
Interferometer  An instrument that uses the principle of interference
of electromagnetic waves for purposes of measurement. Used
to measure a variety of physical variables, such as displacement
(distance), temperature, pressure, and strain.
Microbending  Mechanical stress on a fiber that introduces local
discontinuities, which results in light leaking from the core to the
cladding by a process called mode coupling.
Misalignment Loss   The loss of power resulting from axial misalignment,
lateral displacement, and end separation.
Microbend
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Multimode (MM) Fiber  An optical fiber that has a core large enough to
propagate more than one mode of light The typical diameter is 62.5
micrometers.
Optical Time Domain Reflectometer (OTDR)  Testing system for fiber
strands in which an optical pulse is transmitted through the fiber
and the resulting backscatter and reflections are used to estimate
attenuation and identify defects and the sources of localized losses.
Single-mode (SM) Fiber  A small-core optical fiber through which only
one mode will propagate. The typical diameter is 8-9 microns.
Cladding Glass
Core Glass
Cladding Glass
Core Glass
Source  The means used to convert an electrical information carrying
signal to a corresponding optical signal for transmission by fiber. The
source is usually a Light Emitting Diode (LED) or Laser.
Transceiver  An electronic device which has both transmit and receive
capabilities.
Transducer  A device for converting energy from one form to another,
such as optical energy to electrical energy.
Transmission Loss  Total loss encountered in transmission through a
system.
Input
Output
Transmission Loss
Transmitter  An electronic package which converts an electrical signal to
an optical signal.
Housing
Light Source
PCB Mounting and Electrical Terminals
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Cable Entry
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