Reinhard Maerz

Dense wavelength division multiplex: research activities at Siemens

Some highlights of the development of DWDM systems and components at Siemens are presented. This includes integrated optical DWDM filters in the SiO2/Si and InGaAsP/InP material systems realized as concave reflection gratings on the basis of Rowland and flat-field mountings and as optical phased arrays. An overview of the activities wavelength-switched optical networks with optical ADD/DROP multiplexers and cross connects is given.

Computer-aided engineering for integrated optics

This short tour through computer-aided engineering (CAE) for integrated optics reports on the following topics from a CAE point of view: eigenmode analysis beam propagation, coupled mode theories, computer-aided design and some software aspects. Status and trends are discussed in terms of the fully developed CAE scenario of microelectronics. BPM benchmark results are presented to provide a feeling for the predictive power of todays solvers.

Results of benchmark tests for different numerical BPM algorithms

Key results of a benchmark test, initiated in 1992 by the Working Group 2 of COST Project 240 at a modelling workshop in Teupitz, Germany, are presented. A great number of algorithms--FFT-BPM, various types of FD-BPM, wide angle approximations, adaptive FE- BPM and MoL-BPM--are compared. The quasi-analytic character of the benchmark tests provides a deeper insight into the absolute accuracy of algorithms.