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Fiber Optic Cable Types

Fiber Optic Cable Types   Simplex Cable Single strand of fiber surrounded by a 900 um buffer then a layer of Kevlar and finally the outer jacket.   Available in 2mm or 3mm Plenum or Riser Jacket.   Plenum is stronger and made to chare in fire versus riser is made to melt in fire.  Full Article…

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Fiber Optic Tutorial – Commonly Used Fiber Connectors

  What are Fiber Optic Cables? Fiber optic cables consist of a glass core and cladding, buffer coating, Kevlar strength members and a protective outer jacket. Fiber optic cables use light pulses as opposed to electrical signals to send information. How are Fiber Optic Cables used? Fiber optic cables can be plugged into communications equipment  Full Article…

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Fiber

What is single mode fiber? In optical fiber technology, single mode fiber is optical fiber that is designed for the transmission of a single ray or mode of light as a carrier and is used for long-distance signal transmission. For short distances, multimode fiber is used. Single mode fiber has a much smaller core than  Full Article…

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Which type of fiber cable splicing welds fibers together using a small electric arc?

Mechanical splicing Fusion splicing (Correct) Electric splicing Hot splicing Splicing is the process of permanently joining two fiber cables. There are two types of splices—mechanical and fusion. Mechanical splices use specially designed connectors that align the fiber cores and physically hold the cable ends securely in place. During fusion splicing, heat is applied to the  Full Article…

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Which of the following fiber optic testing devices uses light pulses to estimate a fiber cable’s length and measure attenuation?

Flashlight Visual Fault Locator (VFL) Optical Time Domain Reflectometer (OTDR) (Correct) Time Domain Reflectometer (TDR) A variety of devices can be used to test fiber optic cables, including: Light sources: Flashlight, LED, or laser used to check the continuity and polarity of a cable Visual Fault Locators (VFL): A very powerful light source, such as  Full Article…

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What type of coupling loss occurs when each fiber core is perfectly seated and aligned and has the same diameter, but the transmitting fiber has a light cone larger than the receiving fiber can take?

Gap or space between the cable ends Core size mismatch Angular misalignment Numerical aperture mismatch (Correct) As noted above, there are many potential causes of transmission loss or attenuation. When two cables are spliced together or joined with mated connection, several types of coupling loss can occur, such as: Core size mismatch: Occurs when the  Full Article…

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Attenuation, or transmission loss, in fiber optic cables, beyond the intrinsic absorption of the fiber material, can be due to which of the following?

Density fluctuations on impurities in the cable core Misaligned connections Bends in the cable All of the above (Correct) Several factors can cause transmission loss, or attenuation, in fiber optic cables. The glass molecules in the fiber core may absorb a very small amount of light energy. The manufacturing process may cause density fluctuations or  Full Article…

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Which of the following is NOT a light source used with LAN or WAN fiber cable?

LED VCSEL GSM (Correct) FP lasers There are basically two categories of light sources used with fiber optic networking equipment—LED (light emitting diode) and laser. LED Within these two broad categories, there are several specific types of emitters, such as: Surface-emitting LED Edge-emitting LED FP laser (Fabry Perot laser) DFB laser (distributed feedback laser) VCSEL  Full Article…

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True or False: All fiber optic cables have the same type of physical connector?

True False (Correct) Ethernet equipment manufacturers long ago standardized around the 8P8C connector—referred to as an RJ45 connector by most IT professionals. Unfortunately, the same cannot be said for the makers of fiber optic networking equipment. Fiber optic cables can be terminated with a variety of connectors, such as: FC (Ferrule Connector) LC (SFF Lucent  Full Article…

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What are the two general types of fiber optic cable found in current networking environments?

Red and Green Singlemode and Multimode (Correct) High-frequency and Low-frequency Narrowband and Wideband There are two general types of fiber optic cable found in LAN and WAN networking equipment—singlemode and multimode. The fiber core used in singlemode cable is significantly smaller (typically between 8 and 10 microns) than the core used is multimode cable (usually  Full Article…

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Which of the following is a critical safety concern when working with or around LAN or WAN fiber optic cables?

Hearing loss Burns to the hands Permanent eye damage (Correct) Exposure to noxious fumes There are two significant safety concerns when working with fiber optic cable—the glass shards often generated during fiber termination (unless you’re working with plastic optical fiber) and permanent eye damage. Whether you’re using a laser to transmit data or make a  Full Article…

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