ROADM

Reconfigurable optical add-drop multiplexer (ROADM) is a device or equipment used in dense wavelength division multiplexing (DWDM) systems. Its function is to dynamically add or drop the path through remote reconfiguration. Business wavelength. In other words, in the middle of the line, the wavelengths of upstream and downstream services can be assigned as needed to achieve flexible scheduling of services.

ROADM main functions:

Wavelength routing: ROADM can route specific wavelengths to specific output ports as needed.
Wavelength Add/Remove: ROADM can add new wavelengths to the fiber link, or delete existing wavelengths from the fiber link.
Wavelength conversion: ROADM can convert one wavelength to another wavelength.

ROADM main technologies:

Optical switch: An optical switch is an optical device that can control the path of an optical signal.
Wavelength selector: A wavelength selector is an optical device that can select optical signals based on wavelength.
Optical attenuator: An optical attenuator is an optical device that can attenuate the power of optical signals.

ROADM working principle diagram

Reconfigurable optical add-drop multiplexers are widely used in optical fiber communication networks, including telecommunications networks, data communication networks, video surveillance networks, etc.

Telecommunications network: In telecommunications networks, ROADM can be used to build optical transport networks (OTN), thereby improving the flexibility, scalability and reliability of the network.
Data communication network: In data communication network, ROADM can be used to build a data center interconnection network (DCI), thereby improving the flexibility, scalability and reliability of the network.
Video surveillance network: In a video surveillance network, ROADM can be used to build a video surveillance network, thereby improving the flexibility, scalability, and reliability of the network.

ROADM’s key features include:

Reconfigurability: ROADM can be dynamically configured according to network needs, thereby increasing network flexibility.
Scalability: ROADM can support multiple wavelengths and rates to meet network expansion needs.
Manageability: ROADM can be managed through a network management system, simplifying network maintenance.