FOA CFOT Terms and Definitions A thru Z
Exam questions with correct answers
What |is |a |linear |measure |of |optical |power? |- |VERIFIED |ANSWER✔✔-Watts
What |is |the |measure |of |the |color |of |light, |usually |expressed |in |nanometeres |(nm) |or |microns |(*m)? |-
|VERIFIED |ANSWER✔✔-Wavelength
What |do |you |call |a |technique |of |sending |signals |of |several |different |wavelengths |of |light |into |the |
fiber |simultaneously? |- |VERIFIED |ANSWER✔✔-Wavelength |Division |Multiplexing |(WDM)
The |difference |(in |dB) |between |the |power |budget |and |the |loss |budget |(i.e. |the |excess |power |margin)
|is |known |as |what? |- |VERIFIED |ANSWER✔✔-Working |Margin
A |device |that |couples |visible |light |into |the |fiber |to |allow |visual |tracing |and |testing |of |continuity. |- |
VERIFIED |ANSWER✔✔-Visual |Fault |Locator |(VFL)
A |type |of |laser |that |emits |light |vertically |out |of |the |chip, |not |out |of |the |edge, |and |is |widely |used |in |
fast |multimode |networks. |- |VERIFIED |ANSWER✔✔-Vertical |Cavity |Surface |Emitting |Laser |
(VCSEL)
A |device |which |includes |an |LED |or |laser |source |and |signal |conditioning |electronics |that |is |used |to |
inject |a |signal |into |fiber. |- |VERIFIED |ANSWER✔✔-Transmitter
Confinement |of |light |into |the |core |of |a |fiber |by |the |reflection |off |the |core-cladding |boundary. |- |
VERIFIED |ANSWER✔✔-Total |internal |reflection
A |laser |diode |or |LED |used |to |inject |an |optical |signal |into |fiber |for |testing |loss |of |the |fiber |or |other |
components. |- |VERIFIED |ANSWER✔✔-Test |source
A |kit |of |fiber |optic |instruments, |incl. |power |meter, |source |and |test |accessories |(to |measure |loss |and |
power) |- |VERIFIED |ANSWER✔✔-Test |kit
A |short |single |fiber |jumper |cable |with |connectors |on |both |ends. |This |cable |must |be |made |of |fiber |
and |connectors |of |matching |type... |- |VERIFIED |ANSWER✔✔-Test |cable
The |preparation |of |the |end |of |a |fiber |to |allow |connection |to |another |fiber |or |active |device. |- |
VERIFIED |ANSWER✔✔-Termination
A |communication |device |that |allows |conversation |over |unused |fibers. |- |VERIFIED |
ANSWER✔✔-Talkset
LED |that |emits |light |perpendicular |to |the |semiconductor |chip. |Most |LEDs |used |in |data |
communications |are |this |type. |- |VERIFIED |ANSWER✔✔-Surface |emitter |LED
, This |is |a |multimode |fiber |where |the |core |is |all |the |same |index |of |refraction. |- |VERIFIED |
ANSWER✔✔-Step |index |fiber
Equilibrium |modal |distribution |(EMD) |in |multimode |fiber |(achieved |some |distance |from |the |
source) |where |the |relative |power |in |the |modes |becomes |stable |with |increasing |distance. |- |
VERIFIED |ANSWER✔✔-Steady |State |Modal |Distribution
The |distribution |of |power |among |the |output |fibers |of |a |coupler. |- |VERIFIED |ANSWER✔✔-
Splitting |Ratio
A |device |that |provides |for |a |permanent |connection |between |two |fibers. |- |VERIFIED |
ANSWER✔✔-Splice |(fusion |or |mechanical)
A |laser |diode |or |LED |used |to |inject |an |optical |signal |into |fiber |- |VERIFIED |ANSWER✔✔-Source
A |fiber |with |small |core |that |allows |only |one |mode |of |light |to |propagate. |Commonly |used |with |laser |
sources |for |high |speed, |long |distance |links. |- |VERIFIED |ANSWER✔✔-Singlemode |Fiber
Term |used |for |outer |protective |layers |of |a |cable |(jacket, |armor |and |strength |members) |- |VERIFIED |
ANSWER✔✔-Sheath
The |change |of |direction |of |light |after |striking |small |particals |that |causes |loss |in |optical |fibers. |- |
VERIFIED |ANSWER✔✔-Scattering
A |device |that |receives |a |fiber |optic |signal |and |regenerates |it |for |retransmission |(typical |in |very |long |
fiber |optic |links) |- |VERIFIED |ANSWER✔✔-Repeater
Property |of |optical |materials |that |relates |to |velocity |of |light |in |material. |- |VERIFIED |
ANSWER✔✔-Refractive |index
A |device |containing |a |photodiode |and |signal |conditioning |circuitry |converting |light |to |an |electrical |
signal |in |fiber |optic |links. |- |VERIFIED |ANSWER✔✔-Receiver
Known |good |fiber |optic |jumper |cable |attached |to |power |meter |for |loss |testing. |Must |be |made |of |
matching |fiber |and |connectors |of |cables |tested. |- |VERIFIED |ANSWER✔✔-Receive |cable
Large |diameter |glass |rod |where |fiber |is |made |or |"drawn" |from. |- |VERIFIED |ANSWER✔✔-
Preform
Dispersion |in |singlemode |fiber |caused |by |difference |in |speed |of |light |of |the |fibers |polarization |
modes. |- |VERIFIED |ANSWER✔✔-Polarization |Mode |Dispersion |(PMD)
Fiber |made |with |glass |core |and |plastic |cladding. |- |VERIFIED |ANSWER✔✔-Plastic-clad |Silica |
(PCS) |fiber
Exam questions with correct answers
What |is |a |linear |measure |of |optical |power? |- |VERIFIED |ANSWER✔✔-Watts
What |is |the |measure |of |the |color |of |light, |usually |expressed |in |nanometeres |(nm) |or |microns |(*m)? |-
|VERIFIED |ANSWER✔✔-Wavelength
What |do |you |call |a |technique |of |sending |signals |of |several |different |wavelengths |of |light |into |the |
fiber |simultaneously? |- |VERIFIED |ANSWER✔✔-Wavelength |Division |Multiplexing |(WDM)
The |difference |(in |dB) |between |the |power |budget |and |the |loss |budget |(i.e. |the |excess |power |margin)
|is |known |as |what? |- |VERIFIED |ANSWER✔✔-Working |Margin
A |device |that |couples |visible |light |into |the |fiber |to |allow |visual |tracing |and |testing |of |continuity. |- |
VERIFIED |ANSWER✔✔-Visual |Fault |Locator |(VFL)
A |type |of |laser |that |emits |light |vertically |out |of |the |chip, |not |out |of |the |edge, |and |is |widely |used |in |
fast |multimode |networks. |- |VERIFIED |ANSWER✔✔-Vertical |Cavity |Surface |Emitting |Laser |
(VCSEL)
A |device |which |includes |an |LED |or |laser |source |and |signal |conditioning |electronics |that |is |used |to |
inject |a |signal |into |fiber. |- |VERIFIED |ANSWER✔✔-Transmitter
Confinement |of |light |into |the |core |of |a |fiber |by |the |reflection |off |the |core-cladding |boundary. |- |
VERIFIED |ANSWER✔✔-Total |internal |reflection
A |laser |diode |or |LED |used |to |inject |an |optical |signal |into |fiber |for |testing |loss |of |the |fiber |or |other |
components. |- |VERIFIED |ANSWER✔✔-Test |source
A |kit |of |fiber |optic |instruments, |incl. |power |meter, |source |and |test |accessories |(to |measure |loss |and |
power) |- |VERIFIED |ANSWER✔✔-Test |kit
A |short |single |fiber |jumper |cable |with |connectors |on |both |ends. |This |cable |must |be |made |of |fiber |
and |connectors |of |matching |type... |- |VERIFIED |ANSWER✔✔-Test |cable
The |preparation |of |the |end |of |a |fiber |to |allow |connection |to |another |fiber |or |active |device. |- |
VERIFIED |ANSWER✔✔-Termination
A |communication |device |that |allows |conversation |over |unused |fibers. |- |VERIFIED |
ANSWER✔✔-Talkset
LED |that |emits |light |perpendicular |to |the |semiconductor |chip. |Most |LEDs |used |in |data |
communications |are |this |type. |- |VERIFIED |ANSWER✔✔-Surface |emitter |LED
, This |is |a |multimode |fiber |where |the |core |is |all |the |same |index |of |refraction. |- |VERIFIED |
ANSWER✔✔-Step |index |fiber
Equilibrium |modal |distribution |(EMD) |in |multimode |fiber |(achieved |some |distance |from |the |
source) |where |the |relative |power |in |the |modes |becomes |stable |with |increasing |distance. |- |
VERIFIED |ANSWER✔✔-Steady |State |Modal |Distribution
The |distribution |of |power |among |the |output |fibers |of |a |coupler. |- |VERIFIED |ANSWER✔✔-
Splitting |Ratio
A |device |that |provides |for |a |permanent |connection |between |two |fibers. |- |VERIFIED |
ANSWER✔✔-Splice |(fusion |or |mechanical)
A |laser |diode |or |LED |used |to |inject |an |optical |signal |into |fiber |- |VERIFIED |ANSWER✔✔-Source
A |fiber |with |small |core |that |allows |only |one |mode |of |light |to |propagate. |Commonly |used |with |laser |
sources |for |high |speed, |long |distance |links. |- |VERIFIED |ANSWER✔✔-Singlemode |Fiber
Term |used |for |outer |protective |layers |of |a |cable |(jacket, |armor |and |strength |members) |- |VERIFIED |
ANSWER✔✔-Sheath
The |change |of |direction |of |light |after |striking |small |particals |that |causes |loss |in |optical |fibers. |- |
VERIFIED |ANSWER✔✔-Scattering
A |device |that |receives |a |fiber |optic |signal |and |regenerates |it |for |retransmission |(typical |in |very |long |
fiber |optic |links) |- |VERIFIED |ANSWER✔✔-Repeater
Property |of |optical |materials |that |relates |to |velocity |of |light |in |material. |- |VERIFIED |
ANSWER✔✔-Refractive |index
A |device |containing |a |photodiode |and |signal |conditioning |circuitry |converting |light |to |an |electrical |
signal |in |fiber |optic |links. |- |VERIFIED |ANSWER✔✔-Receiver
Known |good |fiber |optic |jumper |cable |attached |to |power |meter |for |loss |testing. |Must |be |made |of |
matching |fiber |and |connectors |of |cables |tested. |- |VERIFIED |ANSWER✔✔-Receive |cable
Large |diameter |glass |rod |where |fiber |is |made |or |"drawn" |from. |- |VERIFIED |ANSWER✔✔-
Preform
Dispersion |in |singlemode |fiber |caused |by |difference |in |speed |of |light |of |the |fibers |polarization |
modes. |- |VERIFIED |ANSWER✔✔-Polarization |Mode |Dispersion |(PMD)
Fiber |made |with |glass |core |and |plastic |cladding. |- |VERIFIED |ANSWER✔✔-Plastic-clad |Silica |
(PCS) |fiber
