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ralowery
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- What are four Intrinsic Coupling Losses?
- numerial aperture
- core diameter mismatch
- concertricity loss
- ellipticity
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What are four Extrinsic Coupling Losses?
- end separation
- axial/lateral misalignment
- angular misalignment
- surface finish
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What is scattering?
the partial deflection of light rays as they travel along the fiber core
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What type of scattering is responsible for 90% of all attenuation?
rayleigh scattering
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What is the second leading cause of attenuation?
absorption
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What is fiber dispersion?
is the speading of light pulses as they travel down the optical fiber
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What type of dispersion effects both single mode fiber and multi-mode fiber?
chromatic dispersion
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What is the difference between a microbend and macrobend?
- microbends are microscopic imperfections caused by local mechanical damages and can't be seen by the human eye
- macrobends are large bends that can be seen by the human eye
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What should be worn at all times when working with cable, fiber, and/or chemicals?
safety glasses
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what is intrinsic coupling losses
are caused by inherent fiber characteristics
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what are the three primary types of scattering
- rayleigh
- stimulated brillouin
- stimulated raman
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what does SRS stand for
stimulated raman scattering
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what does SBS stand for
stimulated brillouin scattering
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what are the different types of dispersion
- modal dispersion
- chromatic dispersion
- polarization mode dipersion
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what does PMD stand for
polarization mode dispersion
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what type of dispersion effects single mode fiber
polarization mode dispersion PMD
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what type of dispersion effects multi-mode fiber
modal dispersion
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What are the three types of fiber optic test cables needed to test for serviceability?
- ST-ST fiber optic test cables
- LC-ST fiber optic test cables
- LC-LC fiber optic test cables
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What does FOM stand for?
fiber optic meter
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What does the DSP-FOM?
is an optical power loss meter that provides fiber testing capabilities for the fluke etherscope series II network assistant
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What source type is used by the DSP-FOS?
fiber optic light emitting diode power source
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What type of optical adapter is used with the DSP-FOS?
ST
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What emitter type does the Fluke LS-1310/1550 Optical Light Source use?
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What are the output wavelengths of the Fluke LS-1310/1550 Optical Light Source?
- 1310 nm +- 20nm
- 1550 nm +- 30nm
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What are the two pulse duration settings of the Fluke LS-1310/1550 Optical Light Source?
- continuous wave CW
- modulating wave MOD
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What type of cable is used to connect the DSP-FOM to the Fluke EtherScope?
known good Cat 5e
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What is used to connect the two fiber optic test cables together during a serviceability test?
coupler
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What is the dB loss limit set to?
3dB
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what does CW stand for
continuous wave
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what does MOD stand for
modulating wave
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what does FOS stand for
fiber optic source
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What fiber optic source is used to test ST-ST Single-Mode multiple strand fiber optic cable?
FLUke 1310/1500 fiber optic source
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What is used to connect the two fiber optic test cables?
COUPLER
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What is the Loss Budget set to on the Fluke EtherScope Series II Network Assistant when testing fiber optic cable?
3dB
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When is the wavelength used to measure a Single-Mode LC-LC fiber optic cable?
when you turn on the DSP-FOM
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What does OTDR stand for?
optical time domain reflectometer
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How does an OTDR measure for loss?
an instrument that analyzes the light loss in an optical fiber
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What can an OTDR be used determine within a fiber optic network?
the location of the errors
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What type of screen do OTDR’s use to display test results?
LED
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What is a Dead Zone?
exceptionally high signal reading for the initial 1 to 10 meters of the fiber optic cable
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What is an End of Fiber Spike?
exceptionally high signal reading caused by light reflecting off the mirror-like polished end of the optical fiber
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What is the Ghost?
- often called a phantom signal
- a faint, second image of a stronger, preceding signal caused by reflection
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What is noise?
- referred to as the noise floor
- continuation of an OTDR measurement that results in an OSNR level so low, the unit cannot determine if there is more optical cable present
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What does VFL stand for?
- visifault
- visual fault locator
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What is the purpose of the Fluke Visifault?
is a visible light source that helps trace optical fibers, check fibers continuity, and find faults such as breaks, bad splices, and tight bends in fiber optic cable
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What class of laser does the Fluke Visifault utilize?
class 2 laseer
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What type(s) of fiber is the Fluke Visifault used with?
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When the Fluke Visifault locator is not in use, what safety precaution is taken?
cover the VFL's output with the dust cap
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What type of connectors does Fluke Visifault’s universal fiber adapter accept?
2.5mm ferrules (SC ST FC)
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what are the four things on the VFL
- VFL's output
- power button
- flash key
- status LED
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