absorption:

Weakening of a radiation while passing through a material which leads to a transformation in other energy type i.e. thermal energy

acceptance angle:

Is the maximum angle which incoming light can be captured  by a FOC core and propagate within the FOC core.

attenuation coefficient:

Attenuation related to the fiber length. The attenuation coefficient is referred to as dB/km.

attenuation:

The reduction in the amplitude of a wave motion due to losses which occur during passage along a  conductor.

attenuation blind area:

Minimal distance from a reflecting happening to measure the attenuation of the following happening.

backfiber:

Back-end fiber, set-up behind the measured optical fiber.

bandwidth:

Frequency, whereby amount of the transfer function (related to light output) of a FOC has fallen to half of its own feeding amount.

bandwidth length product:

Band width of a FOC is approximately inversely proportional to its own length. The bandwidth length product is an important parameter to describe the transfer characteristics of a multimode-FOC.

bend loss:

Additional attenuation occurred through micro or macro kinks. A high bend loss can occur at cable manufacturing or not suitable cable lining.

cabel:

One or more cable bundles of same type und same category which has a common clad. It could have common coating.

cabeling:

Arrangement of massage cables, flexible cables and connection technology, which supports devices of the information technology.

cabel bundle:

One or more stranding elements usually from same type and category. The cable bundle could have a common shield. Notice: A wounded bundle is an example for a cable bundle.

chromatic dispersion:

Spread of an impulse in optical fibers occurred through different velocities in individual parts of wave lengths of light signals. It is essential for single mode optical fibers and consists of material dispersion and wave transmitter dispersion.

cladding:

The whole optical transparent material of an optical fiber while excluding the core.

coated cable:

Arrangement of one or many symmetrical stranding elements. (pairs or star quad) which have a common shield and a common clad.

coated twisted pair cable:

A cable with conductors, which consists of one or more individual stranding elements. Notice: It could have a common shield. In that case the product is called "coated twisted pair cable".

coding:

A mechanical fixture at a plug connection system which ensures a laterally correct connection or leading of a plug connection into a socket. IT blocks an OF adapter with the same connector, which is determined for another application.

common area interface:

Interconnection point between public network and private network. In many cases the interface of a public network is that point, where network providers are connected to the local network.

connecting cable:

Cable, which connects the IT interconnection with the final product.

connection point:

Place, where device connection cables are wired and connected to the subsystem of cablings without using any patch cable and patch field bundle.

core:

Central area of an optical fiber used to transmit light.

core eccentricities:

A parameter which shows the whole distance from the middle of fiber core to middle of the whole fiber.

critical angle:

The incidence angle of a light beam when passing from one medium, with a high refractive index into another medium with a smaller refractive index, whereby the refractive index is 90°.Overstepping the critical angle makes light transmission within the fiber not possible.

cut-back technique:

Method to measure attenuation of an optical fiber tailored.

cut-off wavelength

The shortest wave length, whereby the basic mode of optical fiber is  capable of propagation. To reach the first-mode-run the cut-off wave length have to be smaller than the wave length of the light transmitted.

differential mode delay

Running time differences between modes, occurs due to mixing up of different types of fibres (OVD and IVD) in giga bit- ethernet. It harms the bandwidth length of the product.

dispersion:

Controlling of group running time within a fiber. Due to the dispersion, light impulses become greater and therefore limit the transmission rate.

dispersion-shifted fiber:

Fiber with shifted zero crossing coefficient of DSF chromatic dispersion (G.653) The zero crossing in DSF is at 1550nm. That fiber has at 1550nm a minimal chromatically dispersion as well as a minimal attenuation.

distribution point:

Distributor, where a floor distribution cable ends and at the same time where a primary cable is wired. Set of components (i.e. patch fields, patch cables) to connect cables functionally.

ferule:

Guiding post for OF plug connection by which the optical fiber cable are fixed. Ferules are made of corrosion protected and abrasion resistant materials. In the past Arcap or Tungsten- Carbide was used but nowadays Zinc-Oxide-Ceramics are in use. Plastics are just used for simple applications.

fiber buffer:

Consists of one or more materials, which protects a single fiber against damage.

Fiber-to-the-Desk:

Laying optical fiber cables until workdesk.

Fiber-to-the-Home:

Laying optical fiber cables until domestic facilities.

fibre, fiber:

An overtaken description from the UK to describe optical fibers. 

floor distribution:

Distributer, used for connection of tertiary cables and other subsystems for cabling and active devices ( read more at “IT interconnection area”)

floor distribution cable:

Cables, which connect a floor distributor with a floor distribution cable. Floor distribution cables can be connected to floor distributor in the same facility.

fresnel reflection:

Reflection of any disruption of flow or refractive index.

fresnel reflection loss:

Loses due to a fresnel reflection. 

fused fiber splice: 

Connection of two optical fibers through fusing the ends with arc.

ghosts:

Disruption in backscattering diagram due to multi reflection in the optical fiber line.

graded index profile:

Refraction profile of an optical fiber, which continuously steady decline over the cross sectional area, mostly parabolic, from inside to outside.

hybrid cable:

Combination of two or more cable bundles or cables different types or from different categories joined together in one clad. It could have a common shield.

insertion loss:

Method to measure attenuation, whereby optical fibre line is put into a reference route.

interconnection cable:

Cables, which are connected to distributor device.

interconnection way:

Transmission way of the universal cabling interface. It excludes device connection cable and device plug.

interface:

Point, where cables are connected universally.

IT interconnection:

Fixed plug device where the tertiary cable ends. IT interconnection forms the interface until device connection cabling.

IT interconnection area:

A locked area, where IT interconnected devices, cable supporting points and distributors are installed. The IT interconnection area is that area where sub systems of tertiary and secondary cablings are connected together.

launch efficiency:

Determines the efficiency of an optical transmitter if it is coupled to a fiber. The coupling efficiency is the ratio of Input power to output power.

launching fiber:

Optical fiber placed before the optical fiber to be measured.

local area distributor:

Distributor, where the primary cabling starts. 

loss:

Losses, occurred while connecting two optical fibers. Differences have to made between losses due to fiber losses (different types of fibres) and mechanical losses (connection technology).

Low-water-peak-fiber:  

Single mode-OF with low attenuation coefficient in a wave length range of 2 and 3. Optical windows through reduction of the OH peak with a wave length of 1,38µm (G.652C).

Low-Water-Peak-Faser:

Singlemode-LWL mit kleinem Dämpfungskoeffizienten im Wellenlangen- bereich zwischen dem 2. und 3. optischen Fenster durch Reduktion des OH-Peaks bei der Wellenlange 1,38µm (G.652C).

macro bending:

Axial deviation (with big diameter) of an optical fiber from a line (i.e. of a feeding spool).

modal dispersion:

Overlapping of modes with different running times but same wave lengths.

modal field diameter:

Parameter to characterize the ray distribution of the basic mode in the single mode fiber. It is the result, if light power declines to 1/e part of its own maximal value. Field diameter is mostly bigger than the core diameter of the optical fiber.

mode filter:

Filter component to emit modes higher order.

modes:

Solutions of Maxwell while taking into accont the framework of the fiber.

multimode fiber:

An optical fiber, whereby core diameter is bigger compare to the wave length of the light. Within the multimode fiber various modes can propagate.

numerical aperture:

Is the sinus of the acceptance angle of an optical fiber. The numerical aperture is dependent on the refractive index of the core and of the cladding.

optical return loss:

Sum of the output losses (reflection and backscattering) occurred through in a certain length within a section of the OF.

patch cable:

Cable, which connects floor distributors with corresponding IT interconnection plug. (plugs).

patch field:

Patch distributor, arranged to use patch fields. It facilitates the system administration during moving or changes.

patch field bundle:

Cable bundle or a stranding element without any plug connectors which is used to set up connection between patch fields.

patch field cable:

Flexible cable bundle or flexible stranding element assembled with plug connectors and which is used to set up a connection within patch fields.

patch field distributor:

Setup, which allows wiring and connecting of stranding elements with patch cables and patch field bundles. 

pigtail:

Short part of a optical fiber cable assembled on one side with a FOC connector in order to splice to a fiber optic cable or coupled  to an optical component (i.e. laser diode)  with a connector.

point of hand-over:

Setup, which has all necessary mechanical and electrical capability characteristics. It complies fully all relevant directives to implement communication cables in a facility.

primary coating:

Cladding material with a diameter of 250m, whereby the fiber is moulded onto the glass during the pull process. It mostly consists of Acrylat or silicon.

primary distribution cable:

Cable, which connects fixed distributors with distributors. Primary cables can be connected to distributors directly.

receptacle:

An active optical fiber connecoter.

reflection:

Ratio from light reflected to incident light.

refraction:

Change of direction of a light wave, if light goes from one medium into another medium and refractive indexes are different from each other.

refractive index:

Difference between the spreading velocity of an optical  fiber and speed of light in vacuum environment. It is dependent on the transmission wave length.

refractive index difference:

Difference between the biggest refractive index occurring in the greatest core of a FOC and the refractive index of a clad. The refractive index difference is essential for the size numerical aperture.

refractive index profile:

The course of the refractive index over the cross sectional area of a FOC core.

resolution:

Distance between two happenings, whereby the backscattering attenuation device can recognize a certain happening more accurately and measure the attenuation.

ribbon fiber:

Composite of fibers with primary coating connected by a ribbon cable with a common coating.

single-mode fiber:

Optical fiber, whereby the running wave length is capable of propagation just in one mode.

splice:

Firmly bonded connection of fibers.

star quad:

Stoffschlüssige Verbindung von Fasern.

stranding element:

Is the smallest constructional unit of a cable. A stranding element can be covered by a shield. Notice: Pair, star quad and single optic fibers are examples for stranding elements.

symmetrical cable: 

Cable consisting of one or more metallic and symmetric stranding elements (pairs or star quad).

telecommunication technology:

Technology used for transmitting and receiving of digits, signals, texts, voices and pictures, it deals also with transmitting of any types of massages over wire, radio, light or another electromagnetical systems. If the term telecommunication is used in that document, there is no value set or placed legal relevance to this term.

time domain reflect meter:

Time domain reflect meter measures attenuations and reflections while determining the exact position on the optical fiber at the same time.

total internal reflection:

Reflection at the interface between an optically opaque medium and an optical thin medium, whereby the light propagates within the opaque medium. No light is reflected outside.

transmission way:

The complete transmission way, connects two units optionally according to the application.  Device connection cable and the device plug cable are part oft the transmission way.

twisted pair:

Twisted pair or a cord (two face to face conductors) within a star quad.

two-point blind area:

Minimum distance between to reflecting happenings, in order to measure the distance of the second happening.

universal cableling:

A structured IT interconnected cabling system, which is suitable to support various network activities. Universal cabling can be installed without having any knowledge about future network applications. Components dependent on the application are not part of the universal cabling.

unshielded twisted pair cable:   

A cable with conductors, which consists of one or more individual unshielded stranding elements. Notice: It could have a common shield. In that case the product is called shielded cable with unshielded twisted pairs.

work bench:

Is the minimum space of the facility, provided for a staff member.

working area:

Area in a facility, where staff works at the final products.