KAWASAKI: Fujitsu Laboratories and the Fraunhofer Heinrich Hertz Institute HHI announce the development and implementation of a simultaneous wavelength conversion method that functions without any restrictions on the wavelength of the optical signals input or the modulation format. The new method can simultaneously convert the wavelengths of wavelength-division-multiplexed signals necessary for optical communication relay nodes in future wavelength-division-multiplexed optical networks,
This simultaneous wavelength conversion method controls the optical wavelength conversion and the polarization state at once. The prototype wavelength conversion circuit based on this principle can convert optical polarization division multiplexed optical signals exceeding 1 Tbps with high-bandwidth signal transmission.
Unlike the previous technologies, this method utilizes polarization filter, removing the optical signal prior to the wavelength conversion. This helps extracts just the optical signal after the wavelength conversion and control the spacing of the pump light's wavelength. Thus the wavelength after conversion can be controlled at the user's discretion.
The optical signal consists of the vertically polarized wave and the horizontally polarized wave, helping create polarization-multiplexed signals. This new technology helps convert high-bandwidth optical signal into electrical signals while consuming less power. The new technology has the capability to avoid collisions and convert between wavelengths, creating a stable communications environment.