Passive Star Coupler - Couples 1 or more input optical signals coming from fiber optic cables to 1 or more output fiber optic cables acting as receivers. It accomplishes this by using only passive optical components.
Patch Panel - Distribution area to rearrange fiber optic cable connections and circuits. A simple patch panel is a metal frame. One side of the panel is usually fixed. This means that the fiber optic cables are not intended to be disconnected. On the other side are plugs to connect other fiber optic cables.
PC - Physical contact.
PCM - Pulse Code Modulation.
PCS - Plastic clad silica.
PD -
Peak Wavelength - The wavelength at which the optical power of a source is at a maximum.
PF - Perfluorinated
Photocurrent - The electrical current that flows through a photosensitive device, such as a photodiode as a result of exposure to radiant power.
Photodetector - An optoelectronic transducer, such as a pin photodiode or avalanche photodiode.
Photodiode - A semiconductor diode that produces current in response to incident optical power and used as a detector in a fiber optic cable data link.
Photon - A quantum of electromagnetic energy. A discrete unit which lends a particle nature to light in contrast to its wave nature. Photons come into play when one talks about energy exchanges using light.
Photonics - The technology of transmission of information using light.
Physical contact connector - A connector designed with a radiuses tip to assure physical contact of the fiber optic cables and thereby increase return reflection loss.
Pigtail - A short length of fiber optic cable, permanently fixed to a component. It is used to couple power between the component and the fiber optic cable used for transmission.
PIN - Positive intrinsic negative photodiode.
PIN Photodiode - A diode with a large intrinsic region sandwiched between p+ and n- doped semi-conducting regions. Photons absorbed in this region create electron-hole pairs that are then separated by an electric field. This generates an electric current in a load circuit.
PIN-PD - PIN-photodiode.
Pistoning - The movement of a fiber optic cable axially in and out of a ferrule end, often caused by changes in temperature.
Plastic clad silica fiber optic cable - A fiber optic cable having a glass core and a plastic cladding.
Plastic fiber optic cable - Fiber optic cables having a plastic core and plastic cladding.
Plenum - The air handling space between walls, under structural floors and above drop ceilings. This can be used to route intra-building cabling.
Plenum cable - Fiber optic cables whose flammability and smoke characteristic allows it to be routed in a plenum area without being enclosed in a conduit.
PMMA - Polymethylmethacrylate
POF Consortium - Over 60 Japanese companies, government agencies and universities organized to promote plastic optical fiber-plastic fiber optic cable.
POF - Plastic Optical Fiber-plastic fiber optic cable.
POFA - Plastic optical fiber amplifier.
POFIG - US based POF interest group.
Point-to-Point - A fixed link secured between 2 distinct nodes or stations in a network.
Polarization stability - The variation in insertion loss as the polarization state of the input light is varied.
Polishing - Preparing the end of a fiber optic cable by moving the end over an abrasive material.
POLO - Parallel Optical Link Organization.
POLYGUIDE® - Polymer optical waveguide developed by DuPont.
Power meter - Device used to measure attenuation of a plastic fiber optic cable.
Primary coating - The plastic coating applied directly to the cladding surface of the fiber optic cable during manufacture to preserve the integrity of the surface.
Preform - A solid rod of plastic material from with a plastic fiber optic cable is drawn or a glass structure for which glass fiber optic cable is drawn.
Prefusing - Fusing with low current to clean the fiber optic cable end. Precedes fusion splicing.
Primary coating - The plastic coating applied directly to the cladding surface of the fiber optic cable during manufacture to preserve the integrity of the surface.
PTFE - Poly-tetrafluoroethylene, a representative of perfluoropolymer by DuPont and manufactured under the name Teflon®.
Pulse coded modulation - PCM. A technique in which, a analog signal is converted to a digital signal. This is accomplished by sampling the signals amplitude and expressing the different amplitudes as a binary number. Sampling must be at the Nyquist rate - at least twice the highest frequency in the information signal bandwidth.
Pulse spreading - The dispersion of an optical signal with time as it propagates through a fiber optic cable.
PUR - Polyurethane. Material used in manufacture of a type of jacketing material.
PVC - Polyvinyl Chloride. Material used in manufacture of a type of jacketing material.
Feb 2, 2009
Fiber Optic :: Glossary :: P
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