Lehrstuhl für Fertigungstechnologie, Universität Erlangen-Nürnberg

Design and Manufacturing of Highly Precise Fibre Collimator Arrays

Datum: 31.05.2005



  • Prof. Dr.-Ing. Dr.-Ing. E.h. mult. Dr.h.c. M. Geiger
  • Prof. Dr.-Ing. R. Lerch

The implementation of optical data transmission in systems and computer technology as well as the immense data volume which has to be transmitted in wide area networks often require multiple parallel data channels. For the coupling of light in or out of parallel fibres it makes sense to use so called ?fibre collimator arrays? (FCAs). These are fibre arrays, directly coupled to lens arrays. For the realisation of high quality transmission systems an adaptation of the FCAs is necessary, especially regarding the tolerances of the respective system. Generally complex simulation tools have to be used for such tasks. Moreover proper methods especially for the cost efficient and precise alignment of fibres within an array arrangement are not sufficiently investigated. In this thesis, a new and straightforward method for the optimisation of free space coupling systems, the ?differentiated worst case analysis?, has been developed and investigated, employing an actual system for verification and reliability analysis. A comparison with results from an established simulation software approves the principle suitability of this new method. For the adjustment of fibres within an array the applicability of laser based micro alignment was investigated. Specific actuators were developed and optimised by means of simulation. Both, simulation and test results show that laser based micro alignment is applicable for this challenging alignment task. This method promises a cost efficient fabrication of highly precise FCA.