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- Optical_add-drop_multiplexer abstract "An optical add-drop multiplexer (OADM) is a device used in wavelength-division multiplexing systems for multiplexing and routing different channels of light into or out of a single mode fiber (SMF). This is a type of optical node, which is generally used for the construction of optical telecommunications networks. "Add" and "drop" here refer to the capability of the device to add one or more new wavelength channels to an existing multi-wavelength WDM signal, and/or to drop (remove) one or more channels, passing those signals to another network path. An OADM may be considered to be a specific type of optical cross-connect.A traditional OADM consists of three stages: an optical demultiplexer, an optical multiplexer, and between them a method of reconfiguring the paths between the optical demultiplexer, the optical multiplexer and a set of ports for adding and dropping signals. The optical demultiplexer separates wavelengths in an input fiber onto ports. The reconfiguration can be achieved by a fiber patch panel or by optical switches which direct the wavelengths to the optical multiplexer or to drop ports. The optical multiplexer multiplexes the wavelength channels that are to continue on from demultipexer ports with those from the add ports, onto a single output fiber. All the light paths that directly pass an OADM are termed cut-through lightpaths, while those that are added or dropped at the OADM node are termed added/dropped lightpaths. An OADM with remotely reconfigurable optical switches (for example 1×2) in the middle stage is called a reconfigurable OADM (ROADM). Ones without this feature are known as fixed OADMs. While the term OADM applies to both types, it is often used interchangeably with ROADM.Physically, there are several ways to realize an OADM. There are a variety of demultiplexer and multiplexer technologies including thin film filters, fiber Bragg gratings with optical circulators, free space grating devices and integrated planar arrayed waveguide gratings. The switching or reconfiguration functions range from the manual fiber patch panel to a variety of switching technologies including microelectromechanical systems (MEMS), liquid crystal and thermo-optic switches in planar waveguide circuits.Although both have add/drop functionality, OADMs are distinct from add-drop multiplexers. The former function in the photonic domain under wavelength-division multiplexing, while the latter are implicitly considered to function in the traditional SONET/SDH networks.".
- Optical_add-drop_multiplexer thumbnail Fbg_oadm.GIF?width=300.
- Optical_add-drop_multiplexer wikiPageExternalLink terminology.php?letter=all&id=8.
- Optical_add-drop_multiplexer wikiPageID "6223328".
- Optical_add-drop_multiplexer wikiPageRevisionID "591908809".
- Optical_add-drop_multiplexer hasPhotoCollection Optical_add-drop_multiplexer.
- Optical_add-drop_multiplexer subject Category:Fiber-optic_communications.
- Optical_add-drop_multiplexer subject Category:Multiplexing.
- Optical_add-drop_multiplexer comment "An optical add-drop multiplexer (OADM) is a device used in wavelength-division multiplexing systems for multiplexing and routing different channels of light into or out of a single mode fiber (SMF). This is a type of optical node, which is generally used for the construction of optical telecommunications networks.".
- Optical_add-drop_multiplexer label "OADM".
- Optical_add-drop_multiplexer label "OADM".
- Optical_add-drop_multiplexer label "Optical add-drop multiplexer".
- Optical_add-drop_multiplexer sameAs OADM.
- Optical_add-drop_multiplexer sameAs OADM.
- Optical_add-drop_multiplexer sameAs OADM.
- Optical_add-drop_multiplexer sameAs m.0fxm07.
- Optical_add-drop_multiplexer sameAs Q280587.
- Optical_add-drop_multiplexer sameAs Q280587.
- Optical_add-drop_multiplexer wasDerivedFrom Optical_add-drop_multiplexer?oldid=591908809.
- Optical_add-drop_multiplexer depiction Fbg_oadm.GIF.
- Optical_add-drop_multiplexer isPrimaryTopicOf Optical_add-drop_multiplexer.
