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Dual Wavelength Selective Switch (WSS)
Coherent | Finisar

Dual Wavelength Selective Switch (WSS)

Manufacturer: Coherent | Finisar

Datasheet: FWS0120BSCFAL

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Product Detail

The application of Reconfigurable Optical Add/Drop Multiplexers (ROADM) in DWDM optical networks has expanded in recent years to support increasingly more directions as well as increased flexibility in the add/drop structure. Flexgrid® technology is now essential in the efficient use of optical bandwidth for extremely high data rates and advanced modulation formats employed by next generation DWDM transmitters/receivers, including 400Gb/s and 1 Tbit/s signals of the future. These higher data rates require that channel spacing is flexible and can be increased real-time to allow the network to adapt to new transmission formats. Deployment of colorless, directionless (CD) ROADMs and colorless, directionless, contentionless (CDC) is facilitated by the introduction of route & select (R&S) ROADM architectures which, unlike broadcast & select (B&S) ROADMs that require only one WSS per direction, require two WSS per direction. By integrating two WSS, each featuring superior optical performance, in a single module the dual WSS modules by Finisar are optimized for this new generation of R&S ROADMs. Dual WSS modules can also be used as CD 2xNxM Add/Drop modules. Enabled by Finisar LCoS technology, Finisar dual WSS products support Flexgrid® technology, which provides dynamic control of the channel width. Furthermore, once deployed, channel plans are configurable ‘on-the-fly’, meaning that channel bandwidths can be adjusted to most efficiently carry future demand as it arises. Furthermore, Flexgrid® offers full backwards compatibility with both the standard 100 GHz and 50 GHz ITU grids. Flexgrid® also enables the equalization of the power within a single channel, especially important for multicarrier optical signals. Finisar dual modules are available in two mechanical versions: Standard Profile and Low Profile. Low Profile is specifically designed for applications where available space is limited; single slot linecards, for example, require dualHD Low Profile modules. Standard Profile modules can be used in all other applications.

Dual Wavelength Selective Switch (WSS)
The application of Reconfigurable Optical Add/Drop Multiplexers (ROADM) in DWDM optical networks has expanded in recent years to support increasingly more directions as well as increased flexibility in the add/drop structure.
Coherent | Finisar

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Technical Specification

Product Highlights:
  • Dual WSS – two WSS integrated in a module
  • Low and Standard profile mechanical designs
  • 2x1xN WSS configurations
  • Colorless/Directionless 2xNxM WSS configurations
  • Alternative loopback common port
  • Flexgrid® Dynamic Channel Width Control (fully ITU flexible grid (G.694.1) compliant) 6.25 – 4800 GHz Range 6.25 GHz Width Resolution No constraints on the spectrum allocated to a super-channel Hitless channel widening, narrowing and migration with 6.25 GHz resolution
  • Flexgrid® Dynamic Attenuation Control 6.25 GHz Resolution 0 – 20dB Range Hitless channel and intra-channel power equalization
  • LCoS Switching Technology
  • 4.8 THz Frequency Range
  • Route & Select ROADM Architectures
  • Colorless Directionless Add/Drop
  • 10 - 400+ Gb/s Transport
  • Dynamic Gain Equalization
  • Multi-carrier Superchannels
  • Alien Wavelength Routing
  • Flexgrid and Fixed grid ITU 50GHz and 100GHz


Coherent | Finisar

Coherent Corp. is a global leader in materials, networking, and lasers for the industrial, communications, electronics, and instrumentation markets. The company is headquartered in Saxonburg, Pennsylvania. It was founded in 1971 to manufacture high-quality materials and optics for industrial lasers. Today, the company operates in more than 20 countries around the world. Coherent is focused on delivering innovations that fuel market megatrends while pursuing our mission of enabling the world to be safer, healthier, closer, and more efficient. Coherent empowers market innovators to define the future through breakthrough technologies, from materials to systems.

Learn about Coherent | Finisar

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