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Glossary
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IQ-2600B
transfer of energy from the light component aligned with
one axis of birefringence to the other axis of birefringence,
and vice versa. For long fibers, the overall PMD is lowered if
h is relatively short (<10 m), on the order of the fiber beat
length.
hr
Hour
HWHM
Half wave half maximum
Hz
Hertz. Denotes number of cycles per second.
IEC
International Electrotechnical Commission. A
standardization body at the same level as ISO.
IEE
Institute of Electronic Engineering. It is a professional body
covering all aspects of electronics and electrical
engineering, including software, network, and computer
engineering.
IEEE
Institute of Electrical and Electronics Engineering. It is a
professional body very active, among other things, in many
fiber-optic and opto-electronic related fields.
IL
Insertion loss
index matching
material
A material, often a liquid or a cement, whose refractive
index is nearly equal to the core index, used to reduce
Fresnel reflections from a fiber’s endface.
index of refraction
The ratio of the group velocity of light in a vacuum to the
group velocity of light in a given medium.
index profile
The refractive index as a function of radius of an optical
fiber.
InGaAs
Indium gallium arsenide
insertion loss
The ratio of input power to output power in dB units (for a
given output port) for an optical component such as a
connector, splice, or coupler. For a multiport device, the
insertion loss includes the splitting ratio and the excess loss.
ISO
International Organization for Standardization. Commonly
believed to stand for International Standards Organization.
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