WDM Multiplexers and Demultiplexers
Wavelength Division Multiplexers, just we usually called it WDM, it includes CWDM and DWDM. Practically all DWDM systems use array waveguide (AWG) multiplexer/demultiplexers. The Figure shows a schematic layout of an AWG demultiplexer; a multiplexer is identical but for the fact that several signals enter from the waveguides that are the demultiplexer output and the WDM comb emerges from the demultiplexer input. Warm tips: Fiberstore’s 8 channel cwdm multiplexer is on hot sales.
Due to the constant path length difference between adjacent waveguides, this phase change increases linearly from the inner to outer AWGs, which causes the wavefront to be tilted at the output aperture. Consequently, the focal point in the image plane is shifted away from the center. By placing receiver waveguide at proper positions along the image plane, spatial separation of the different wavelength channels is obtained.
AWG are able to process a great number of nearby channels with acceptable loss and a great reproducibility and their structure allows even bigger mux/demux to be designed by cascaded of suitably designed AWG. Well, the next we will solve the problem that DWDM wavelength single fiber.
44 wavelength DWDM Single Fiber solution with Optical Amplifier
For long distance applications which require high optical budget, Fiberstore provide single Fiber Optical Amplifiers (EDFA -Erbium Doped Fiber Amplifier) solution to overcome the needed link budget. The amplifier is connected after the band pass splitter and amplifies at each end the appropriate spectrum.
Wavelength Division Multiplexers and Optical Splitters
Fiberstore range of wavelength division multiplexing products allows protocol-transparent combination and separation of multiple fiber optic channels. The technology enables flexible and efficient planning of optical networks for satellite, broadcast, instrumentation and signal distribution. Using either the WDM or CWDM options it is possible to combine 2, 4 or 8 separate signals onto a single fiber. This technology offers particular benefits when installing new channel capacity into a pre-existing fiber network with a fixed number of fiber cores in the backbone.
Products are available from 1310nm/1550nm WDM duplexers up to ITU-T G.694.2 compliant 8-channel CWDM multiplexers and demultiplexers. High-isolation variants are available which feature exceptional adjacent optical channel isolation and are specifically designed to complement the Fiberstore wide dynamic range inter-facility fiber optic transmitters and receivers.
The 2 channel WDM duplexers are available in either pigtail or plug-in module format allowing OEM’s to build them into larger systems or to be rack mounted in a Fiberstore chassis with other Fiberstore modules. The 4 and 8 channel CWDM systems are available in compact 1U high 19 inch rack format.
Fiberstore offers passive optical splitting components to divide the optical power across two or more optical ports. The power split ratio can vary from 1% (known as a tap-coupler) for service monitoring applications, to 50% or more for service distribution to multi receive sites. Reliability is assured through compliance to Telcordia GR-1221. Fiberstore offer 1×2, 1×4 and 1×8 splitter in either 7HP wide plug in modules for rack mounting or 1U high 19” racks.
Well, as you know, I am working for Fiberstore, and the Christmas Day is coming, our website is doing a big sales, it includes the WDM equiments, fiber amplifer, optical splitter and so on, want to have a more knowledge of fiber optical products, advice you enter into the website to have a detailed look, you will find what you want…