Definitions for light source components Essay

1.Forward Biased LED- A process when a positive voltage is applied to the p region and a negative voltage to the n region. 2.

Incoherent Light- Light in which the electric and magnetic fields of photons are completely random in orientation. Typically emitted from light bulbs and LEDs. 3.Laser-(light amplification by stimulated emission of radiation) used to provide the high-powered, tightly controlled light wavelengths necessary for high-speed, long-distance optical fiber transmission.

4.Output Pattern-is the energy couples into the core of the optical fiber. 5.Output Power- allows transmission distances.6.Modulation Speed- is something that can limit the performance of a fiber-optic communication system. 7.

Core Diameter Mismatch- will cause confusion to the system that you are sending the data from because light will reflect and come back to the system that you sent it from causing that system to process that data. 8.Current- The flow of electrons in a conductor.

9.PIN Photodiode-is manufactured to offer better performance than a regular photodiode. The better performance comes in the form of improved efficiency and greater speed.

10.Avalanche Photodiode- This photodiode works just light an avalanche being that a small bundle of photons can trigger an avalanche of electrons. 11.Responsivity- describes how well the photodiode converts a wavelength or a range of wavelengths of optical energy into electrical current. 12.

Optical Subassembly-guides the light energy from the optical fiber to the photodiode.13.Dynamic Range- The difference between the max and min optical input power that an optical receiver can accept.

14.Operating Wavelength- Fiber optic receivers that are designed to operate within a range of wavelengths.15.Fiber-Optic Coupler- Is a device that combines or splits optical signals.

16.Optomechanical Switch- Redirects an optical signal by moving fiber or bulk optic elements by means of mechanical devices.17.Optical Attenuator- Reduces the intensity of light waves, usually so that the power in within the capacity of the detector.

18.Optical Isolator- A component used to block out reflected and other unwanted light.19.Wavelength Division Multiplexing- Is the combining of different optical wavelengths from two or more optical fibers into just one optical fiber.20.Passive Optical Network- doesn’t use electrically powered equipment or components to route the signal from one place to another.21.

FTTH-(fiber-to-the-home) uses optical fiber from the central office to the home; there are no active electronics helping with the transmission of data in between the two locations.22.FTTB-(fiber-to-the-building) it uses optical fiber form the central office to the building and there are no electronics helping with transmission in between.23.FTTC-(fiber-to-the-curb) optical fiber runs from the central office and stops at the curb.

24.FTTN-(fiber-to-the-node) has optical fiber from the central office to the node. The node is typically a telecommunications cabinet that serves a neighborhood or section of a neighborhood.25.

Feeder Cable- A voice backbone cable that runs from the equipment room cross-connect to the telecommunications cross-connect. It could also be the cable running form a central office to a remote terminal, hub, head end, or node.26.Distribution Cable- An optical fiber cable used “behind-the-shelf” of optical fiber patch panels; typically composed of 900 micron tight buffered optical fibers supported by aramid and or glass reinforced plastic (GRP).27.Drop Point- is a single optical fiber cable that is terminated at the factory, typically with SC connectors on both ends.

28.Local Convergence Point- is the access point where the feeder cables are broken out into multiple distribution cables.29.Network Access Point- is located close to the homes or buildings it services. This is the point where a distribution cable is broken out into multiple drop cables. 30.Network Interface Device- is typically mounted to the outside of the house or building.

It is an all plastic enclosure designed to house the electronics that support the network.