Optical add-drop multiplexer
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 demultiplexer, the multiplexer and a set of ports for adding and dropping signals. The 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 multiplexer or to drop ports. The multiplexer multiplexes the wavelength channels that are to continue on from demultiplexer ports with those from the add ports, onto a single output fiber.
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Do What You Want To Do
by: AdemaWhere will we go?
Where will we go?
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Why do you have to put this on me?
(Where will we go?)
I'm a mess
(Where will we go?)
I'm a mess
Do what you wanna do
Where the fuck you wanna do it
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Where the fuck you wanna do it
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Find a way
(Where will we go?)
I'm a mess
(Where will we go?)
I'm a mess
Do what you wanna do
Where the fuck you wanna do it
Try hard to live your life
Live life the way that you want
Do what you wanna do
Where the fuck you wanna do it
Try hard to live your life