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Exam (elaborations)

FIBER INSTALLATION AND ACTIVATION QUESTIONS WITH COMPLETE ANSWERS

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FIBER INSTALLATION AND ACTIVATION QUESTIONS WITH COMPLETE ANSWERS

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Fiber Optics
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Institution
Fiber Optics
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Fiber Optics

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January 3, 2025
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Written in
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FIBER INSTALLATION AND ACTIVATION
QUESTIONS WITH COMPLETE
ANSWERS

All llfiber-optic llcommunication llsystems llmust llcontain ll- llANS-An lloptical llfiber
lltransmission llmedium


The lloptical llfiber llcore ll- llANS-Transmits llthe lloptical llsignal, lland llits llstructure lland
chemical llmakeup llare llcritical llto llfiber lloperation.

Wavelengths llused llin lla llfiber-optic llcommunication llsystem ll- llANS-Include ll1,310 llnm
lland ll1,550 llnm llin llsingle-mode lltransmission
systems.

As lla lllightwave llenters llan lloptical llfiber, ll- llANS-Its llspeed lldecreases, lland llthe
lllightwave llrefracts llat llan
angle.

Attenuation llin llfiber ll- llANS-Can llbe llcaused llby llabsorption, llscattering, llmacrobends,
lland
fiber llnumerical llaperture llmismatch.

Which llof llthe llfollowing llis llnot llan lladvantage llof lloptical
fiber? ll- llANS-Fiber llcarries llmore llelectrical llcurrent lland llradiates llmore
energy llthan llcoaxial llcable.

Which llof llthe llfollowing llis lltrue llabout lllight llsource llselection
criteria? ll- llANS-Cost llshould llnever llbe lla llhigher llconcern llthan llthe llquality llof
the llsignal llrequired llto llmeet llsystem llperformance.

Laser lldiodes ll- llANS-Being llapplied llfor llthe llupstream lltransmission llfrom llhomes lland
businesses llare llDFB lllasers, lldue llto llthe llincreased llbandwidth

, demands llof llvoice lland lldata llservices

Which llof llthe llfollowing llis llnot lltrue llabout lloptical lldetector
selection llcriteria? ll- llANS-Silicon llis lla llmore llsuitable llphotodetector llmaterial llthan
indium llgallium llarsenide llfor llwavelengths llof ll1,310 llor
1,550 llnm.

Avalanche llphotodiode lldetectors ll- llANS-Require llhigh llstability llpower llsupplies
llbecause llbias llvoltages
to llcreate llhigh llelectrical llfields llalso llmust llbe llhigh.

Fiber llOptics ll- llANS-Light lltransmission llthrough lloptical llfibers llfor llcommunications
llpurposes.


Hybrid llFiber/Coax ll(HFC) ll- llANS-A llbroadband llcable llsystem llarchitecture llthat lluses
llboth llfiber-optic lland llcoaxial llcable.


Fiber llto llthe llhome ll(FTTH) ll- llANS-Distribution llof llcommunication llservices llby
llproviding llfiber-optic lllinks llall llthe llway llto lleach llhouse


Wavelength ll- llANS-The lllength llof lla llsinusoidal llwave llform llmeasured llfrom llany llpoint
llon llone llwave, llto llthe llcorresponding llpoint llon llthe llnext llwave, llsuch llas llfrom llcrest llto
llcrest. llIn llother llwords, lla llwavelength llis llthe lldistance llan llelectromagnetic llwave
lltravels llin llthe lltime llit lltakes llto lloscillate llthrough lla llcomplete llcycle.


In lloptical llterms lla llwavelength lland llthe llfrequency llof lllight llare llconsidered
llsynonymous. llFiver-optic llcommunications lltypically lluse ll850nm, ll1310nm, ll1,550 llnm
llwavelengths llfor llsignal lltransport.


Single- llmode ll- llANS-Single llmode llfiber llallows llonly llone llmode llof llsignal llpropagation
llthrough llthe llfiber llcore llmaterial. llThe llsmall llsize llof llthe llcore llalong llwith llthe llfiber
llgraded llrefractive llindex llprovides lla llnarrow llpath llfor llthe llsignal llto llflow llallowing
llgreater lldistance lland lldecreased llmodal lldispersion. llthe lluse llof llsingle llmode llfiber
lldominates llthe llCable lland llTelecommunications llmetro lland lllong llhaul llnetworks lland
llis llby llfar llthe llmost llcommonly llused llfiber lltype lloutside llplant llapplications.


Light llSource ll- llANS-Generic llterm llfor llan llLED llor llLaser lltype lltransmitter; llterm
llusually llused llin lloptical lltest llequipment.


Photodetector ll- llANS-An llelectro-optic lldevice llthat lltransforms lllight llenergy llinto
llelectrical llenergy.


Light llEmitting llDiode ll(LED) ll- llANS-A llsemiconductor lldevice llthat llemits llincoherent
lllight llformed llby llthe llpositive-negative ll(P-N) lljunction.

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