Alcatel N.v.

Avanex Corporation

Alcatel Lucent

Johannes Koppenborg

Peter Kersten

Jaakko Aarnio

José Antonio Lázaro Villa

Günther Herzog

Rudolf Wessel

A new method for characterizing the amplitude and phase distributions of the light propagating through arrayed-waveguide gratings is presented. The new method is based on the IFT. A very good agreement of the results obtained from the IFT method in comparison with OLC method has been achieved. The new method has been applied to an AWG with a small &#x394;L of 22 &#x3bc;m where the other methods fail. The precision of this measurement is demonstrated by a good agreement between the transmittance obtained from direct measurement and from calculation using the amplitude and phase distributions. Finally we want to point out, that although the results are based on a FTS measurement, the method can be applied to any experimental technique that provides a measurement of the complex transmittance of the AWG.

Inverse fourier transform method, phase characterization method of optical components from transmission and group delay measurements as well as a system for performing the method

An optical mode filter, that is, an optical component in which the basic mode can propagate undamped as much as possible but which in higher modes are strongly damped. The optical mode filter, is an integrated optical wave guide formed by, a higher-refracting or an absorbent material disposed near a flat wave guide core. Two buffer layers are located opposite the wave guide core, and one is formed with a thinned region to function as a filter for higher modes being transmitted through the wave guide core.

Optical mode filter

Growing community of inventors

Sersheim, Germany

Johannes Koppenborg