Search Menu
Photonics Media Photonics Buyers' Guide Photonics EDU Photonics Spectra BioPhotonics EuroPhotonics Industrial Photonics Photonics Showcase Photonics ProdSpec Photonics Handbook
More News
Email Facebook Twitter Google+ LinkedIn Comments

Great Gratings

Photonics Spectra
Aug 2000
Akira Inoue

Dense wavelength division multiplexing (DWDM) is the most effective means for expanding communications capacity in optical networks. The technology places several closely spaced wavelengths of light into one fiber, with each wavelength serving as the communications equivalent of a lane of traffic on a highway. Network providers can easily expand networks by adding wavelengths without having to lay new fibers.

The standard wavelength spacing is 50 or 100 GHz, which corresponds to 0.4 or 0.8 nm in the 1550-nm band. To combine (multiplex) or separate (demultiplex) those narrowly spaced signals from the fiber, networks require optical filters with extremely steep spectral isolation characteristics...

Meet the author

Akira Inoue is involved in research and development at the Yokohama Research Laboratories of Sumitomo Electric Industries Ltd. in Yokohama, Japan. He has a BS from Kyoto University.

CommunicationsFeature ArticlesFeatures

Terms & Conditions Privacy Policy About Us Contact Us
back to top
Facebook Twitter Instagram LinkedIn YouTube RSS
©2018 Photonics Media, 100 West St., Pittsfield, MA, 01201 USA,

Photonics Media, Laurin Publishing
x Subscribe to Photonics Spectra magazine - FREE!
We use cookies to improve user experience and analyze our website traffic as stated in our Privacy Policy. By using this website, you agree to the use of cookies unless you have disabled them.