FIBER OPTICS REVISION EXAM PAPER QUESTIONS AND
ANSWERS GUARANTEE A+
✔✔Rays of light transmitted in multimode fiber are called _____. - ✔✔Modes
✔✔Loss of a fiber or any fiber in a cable is measured in _____ - ✔✔dB
✔✔10 DB corresponds to a factor of _____ in power. - ✔✔10
✔✔A fiber stripper removes the ______ of the fiber. - ✔✔Buffer coating
✔✔The _____ protects the fiber from harm - ✔✔Primary buffer coating, aramid fiber
strength members, and the jacket
✔✔Which fiber optic tests instrument uses backscattered light for measurements? -
✔✔OTDR
✔✔The wavelength of light used for most fiber optic systems is in the _____ region and
_____ to the human eye. - ✔✔Infrared; invisible
✔✔The biggest advantage of optical fiber is the fact it is the most cost effective means
of transporting information. - ✔✔True
✔✔Telephone networks have been converted to fiber, including long distance and
metropolitan networks, but fiber to the home (FTTH) is not yet feasible. - ✔✔False
✔✔Today, with the exception of some _____, the entire telephone backbone is fiber
optics. - ✔✔Rugged or remote locations
✔✔_____ companies "overbuild with fiber, often lashing fiber optic cables to installed
aerial coax cable. - ✔✔CATV
✔✔Copper networks can be converted to fiber optics using ______. - ✔✔Media
Converters
✔✔The bandwidth and distance capability of optical fiber means that _____ (Choose all
that apply) - ✔✔Fewer cables are needed, fewer repeaters are needed, less power is
consumed by the network, and less maintenance is required
✔✔which of the following communications systems typically use fiber optic backbones?
- ✔✔Telephones, CATV, Internet, Cell Phones
✔✔Fiber optic links generally use two fibers for full duplex (bidirectional) links. - ✔✔True
, ✔✔LED's have higher output power and bandwidth than lasers. - ✔✔False
✔✔Singlemode fiber systems covering long distances and using DWDM use _____
sources. - ✔✔DFB laser
✔✔Wavelength division multiplexing uses _____ to transmit multiple signals on a single
fiber. - ✔✔The ability of fiber to transmit multiple wavelengths without mixing
✔✔CWDM systems require _____ to allow transmitting in the E-Band (1260-1360 nm) -
✔✔Low water peak fiber
✔✔Long wavelength singlemode links at wavelengths in the range of 1300-1650 nm
links must use _____ detectors in the receiver for the best sensitivity performance. -
✔✔InGaS
✔✔Fiber amplifiers used in DWDM systems work in the _____ wavelength range. -
✔✔1480 - 1650
✔✔Singlemode transceivers use _____ sources for their higher coupled power and
bandwidth. - ✔✔F-P lasers and DFB lasers
✔✔Multimode transceivers use _____ sources depending on their requirements for
coupled power and bandwidth. - ✔✔LED, VCSEL, and F-P lasers
✔✔Singlemode fiber has a _____ light-carrying core than multimode fiber - ✔✔Smaller
✔✔What is the core size of singlemode fiber? - ✔✔9 microns
✔✔Singlemode fiber has _____ bandwidth than multimode fiber - ✔✔Smaller
✔✔What wavelengths are appropriate for use with singlemode fiber? - ✔✔1310 and
1550 nm
✔✔The diameter of the core in OM2 and OM3 multimode fiber is how large? - ✔✔50
microns
✔✔Which of the following fiber specifications is most important to the user and is an
important factor in testing? - ✔✔Attenuation
✔✔The largest contributor to fiber attenuation is _____ - ✔✔Scattering
✔✔Which fiber typically has the largest core? - ✔✔POF
ANSWERS GUARANTEE A+
✔✔Rays of light transmitted in multimode fiber are called _____. - ✔✔Modes
✔✔Loss of a fiber or any fiber in a cable is measured in _____ - ✔✔dB
✔✔10 DB corresponds to a factor of _____ in power. - ✔✔10
✔✔A fiber stripper removes the ______ of the fiber. - ✔✔Buffer coating
✔✔The _____ protects the fiber from harm - ✔✔Primary buffer coating, aramid fiber
strength members, and the jacket
✔✔Which fiber optic tests instrument uses backscattered light for measurements? -
✔✔OTDR
✔✔The wavelength of light used for most fiber optic systems is in the _____ region and
_____ to the human eye. - ✔✔Infrared; invisible
✔✔The biggest advantage of optical fiber is the fact it is the most cost effective means
of transporting information. - ✔✔True
✔✔Telephone networks have been converted to fiber, including long distance and
metropolitan networks, but fiber to the home (FTTH) is not yet feasible. - ✔✔False
✔✔Today, with the exception of some _____, the entire telephone backbone is fiber
optics. - ✔✔Rugged or remote locations
✔✔_____ companies "overbuild with fiber, often lashing fiber optic cables to installed
aerial coax cable. - ✔✔CATV
✔✔Copper networks can be converted to fiber optics using ______. - ✔✔Media
Converters
✔✔The bandwidth and distance capability of optical fiber means that _____ (Choose all
that apply) - ✔✔Fewer cables are needed, fewer repeaters are needed, less power is
consumed by the network, and less maintenance is required
✔✔which of the following communications systems typically use fiber optic backbones?
- ✔✔Telephones, CATV, Internet, Cell Phones
✔✔Fiber optic links generally use two fibers for full duplex (bidirectional) links. - ✔✔True
, ✔✔LED's have higher output power and bandwidth than lasers. - ✔✔False
✔✔Singlemode fiber systems covering long distances and using DWDM use _____
sources. - ✔✔DFB laser
✔✔Wavelength division multiplexing uses _____ to transmit multiple signals on a single
fiber. - ✔✔The ability of fiber to transmit multiple wavelengths without mixing
✔✔CWDM systems require _____ to allow transmitting in the E-Band (1260-1360 nm) -
✔✔Low water peak fiber
✔✔Long wavelength singlemode links at wavelengths in the range of 1300-1650 nm
links must use _____ detectors in the receiver for the best sensitivity performance. -
✔✔InGaS
✔✔Fiber amplifiers used in DWDM systems work in the _____ wavelength range. -
✔✔1480 - 1650
✔✔Singlemode transceivers use _____ sources for their higher coupled power and
bandwidth. - ✔✔F-P lasers and DFB lasers
✔✔Multimode transceivers use _____ sources depending on their requirements for
coupled power and bandwidth. - ✔✔LED, VCSEL, and F-P lasers
✔✔Singlemode fiber has a _____ light-carrying core than multimode fiber - ✔✔Smaller
✔✔What is the core size of singlemode fiber? - ✔✔9 microns
✔✔Singlemode fiber has _____ bandwidth than multimode fiber - ✔✔Smaller
✔✔What wavelengths are appropriate for use with singlemode fiber? - ✔✔1310 and
1550 nm
✔✔The diameter of the core in OM2 and OM3 multimode fiber is how large? - ✔✔50
microns
✔✔Which of the following fiber specifications is most important to the user and is an
important factor in testing? - ✔✔Attenuation
✔✔The largest contributor to fiber attenuation is _____ - ✔✔Scattering
✔✔Which fiber typically has the largest core? - ✔✔POF
