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Glossary
72
Insertion Loss
The loss of power in a system as a result of inserting a coupler or cable.
Index of Refraction
The ratio of the speed of light in a vacuum to the speed of light in a material.
Laser Safety Class IIIb
Laser light that can emit dangerous radiation is classified IIIb. Requirements
for equipment employing a Class IIIb laser include having a keyswitch with
a removable key to control the laser power. Also required is a means for
remotely disabling the laser output, and labels indicating the location of the
laser aperture.
Link
A transmission path between two stations, channels, or parts of a system.
Long wavelength
The spectrum from 1200 to 1600 nanometers.
LOS
An acronym for Loss of Signal.
Mach-Zehnder Interferometer
A method of measurement optical interference by splitting an optical signal
into two branches and manipulating one. The two branches are then
recombined, producing variable optical interference for analysis.
Modulation
A process of varying the frequency, phase, or amplitude of a signal so it is
suitable for transmission over the medium between the transmitter and the
receiver.
Multimode
A fiber that has a larger core than single mode, it allows light to enter from
several angles, enabling it to connect to broader light sources such as LEDs.
However, the multiple paths that the light takes through multimode fiber
causes dispersion.
Multiplexer
Equipment that combines two or more signals into one.
Multiplexing
Combine several communications signals into one.
Noise
Any unwanted energy that interferes with a signal or measurement.
NRZ
No Return to Zero-When a digital data pattern that has zeroes as lows and
ones as highs, does not return to zero when the pattern has consecutive ones.
OI1125 E/O Transmitter Instruction Manual
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