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- What are the two types of Single Fiber Cable?
- simplex
- duplex
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What is the Multiple Fiber Cable color code for the following? Fiber 1: Fiber 2: Fiber 3: Fiber 4: Fiber 5: Fiber 6: Fiber 7: Fiber 8: Fiber 9: Fiber 10: Fiber 11: Fiber 12:
blue orange green brown slate white red black yellow violet blue stripe orange stripe
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What is tensile strength?
is the ability of a material to resist breaking if it is pulled or stretched
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What is the core of an optical cable?
the central region of an optical fiber through which light is transmitted
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What are loose buffer types normally filled with?
strengthening gel
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What are the three most common strength members?
- kevlar aramid yarn
- fiberglass epoxy rods
- steel strands
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What are the three core/cladding material combinations?
- all glass
- all plastic
- plastic-clad silica (PCS)
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What is the core/cladding interface?
is the point in an optical fiber where the core and the cladding meet, forming a common boundary of the two materials, whether all glass, all plastic, or PCS
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How is the light gathering ability of an optical fiber often expressed?
Numerical Aperture (NA)
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what does NA stand for
numerical aperture
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what does PCS stand for
plastic-clad silica
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What is an optical source?
- component of an optical transmitter
- an electro-optical transducer that converts an electrical signal into an optical signal
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What is an optical detector?
- component of an optical receiver
- an opto-electronic transducer that converts an optical signal into an electrical signal
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A slower modulation rate results in a __________________ bandwidth.
decreased
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What are the two most common optical sources?
- Light emitting diodes (LED)
- Laser Diode (LD)
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what does LD stand for
laser diode
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What is the maximum suggested data rate for LED implementations?
155Mbps
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What does LASER stand for?
light amplification by the stimulated emission of radiation
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What are the two primary types of optical detectors?
- positive-intrinsic-negative (PIN) photodiode
- Aaalanche photodiode (APD)
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what does PIN stand for
positive-intrinsic-negative
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what does APD stand for
avalanche photodiode
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what is noise
is any electrical or optical energy apart from the signal itself
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What are the two measures that must be taken in order to detect a signal amidst noise?
- the noise level must be decreased
- the power level of the signal must be increased
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What does OSNR stand for?
optical signal to noise ratio
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Which is better, a high OSNR or a low OSNR?
high OSNR
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what does BER stand for
bit error rate
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which is better , a high BER or a low BER
Low BER
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What is a mode?
is a path that a light ray can travel down an optical fiber
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What is an index?
relation between the refractive indexes of the core and cladding
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Would an optical fiber rated as 9/125 be a single mode fiber or multi-mode fiber?
single mode
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Would an optical fiber rated as 62.5/125 be a single mode fiber or multi-mode fiber?
multi mode
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What is meant by Step Index?
an optial fiber design in which the refractive index of the core is uniform throughout
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What is meant by Graded Index?
an optical fiber design in which the refractive index of the core decreases toward the outside of the fiber core and increases toward the center of the core
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What type and size of fiber optic cable is normally used in LAN and shipboard applications?
single mode step index fibers with a core and cladding size of (8.2) 9/125 micron
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What is a cable?
fiber optic cable with no connectors installed on either end
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What is a pigtail?
fiber optic cable with connectors installed on one end only
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What is a Jumper?
fiber optic cable with connectors installed on both sides
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What are three functions for fiber optic cable terminations?
- to prepare a smooth surface capable of accepting as much transmitted light as possible
- to provide a precise alignment of the fiber within the connector to allow maximum coupling effectiveness
- to provide a secure physical attachment of the connector to the fiber cable
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Where are LC terminations normally used?
- for edge and core device connectivity
- fiber NICs
- switches
- routers
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Where are ST terminations normally used?
- for intermediary and cross-connect connectivity
- fiber patch panels
- fiber distribution centers FDCs
- wall mountable interconnnection centers WICs
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Where is MT-RJ terminations normally used?
- in legacy edge and core devices
- legacy fiber NICs
- legacy switches
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What does TFOCA-II stand for?
tactical fiber optic cable assmebly
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attenuation
The decrease in power of a signal, light beam, or light wave over the entire length of an optical fiber and measured in dB/Km.
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distortion
Any departure of an output signal shape from an input signal shape over a range of frequencies, amplitudes, or phase shifts during a given time interval resulting from defects in the optical system.
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indicates how fast the optical source can be turned on and off.
modulation rate
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what is Efficiency mean with fiber optic
the max angle the light can go through the fiber optic cable
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what are the compontents of a fiber optic cable from inside out
- core
- cladding
- buffer/coating
- strenth members
- jacket
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what is the acceptance angle
The Acceptance Angle is the maximum angle in which a light wave will be refracted into the core of an optical fiber.
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two methods of splicing fiber optic cables
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