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Proceedings Paper

Data transmission optical link for LLRF TESLA project part I: hardware structure of OPT0 module
Author(s): Krzysztof T. Pozniak; Ryszard S. Romaniuk; Wojciech Jalmuzna; Krzysztof Olowski; Karol Perkuszewski; Jerzy Zielinski; Krzysztof Kierzkowski
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Paper Abstract

It may be predicted now, even assuming a very conservative approach, that the next generation of the Low Level RF control systems for future accelerators will use extensively such technologies like: very fast programmable circuits equipped with DSP, embedded PC and optical communication I/O functionalities, as well as multi-gigabit optical transmission of measurement data and control signals. The paper presents the idea and realization of a gigabit synchronous data distributor designed to work in the LLRF control system of TESLA technology based X-ray FEL. The design bases on a relatively simple and cheap FPGA chip Cyclone. Commercially available SERDES (serializer/deserializer) and optical transceiver chips were applied. The optoelectronic module is embedded on the main LLRF BMB (backbone mother board). The MB provides communication with the outside computer control system, programmable chip configuration, integration with other functional modules and power supply. The hardware implementation is here described and the used software for BER (bit-error-rate) testing of the multi-gigabit optical link. The measurement results are presented. The appendix contains a comparison between the available protocols of serial data transmission for FPGA technology. This paper is a partial contribution to the next version of the SIMCON system which is expected to be released this year. The SIMCON, ver 3.0 will contain 8 channels and multi-gigabit optical transmission capability. It will be a fully modular construction.

Paper Details

Date Published: 26 April 2006
PDF: 8 pages
Proc. SPIE 6159, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments IV, 615902 (26 April 2006); doi: 10.1117/12.674814
Show Author Affiliations
Krzysztof T. Pozniak, Warsaw Univ. of Technology, (Poland)
Ryszard S. Romaniuk, Warsaw Univ. of Technology, (Poland)
Wojciech Jalmuzna, Warsaw Univ. of Technology, (Poland)
Krzysztof Olowski, Warsaw Univ. of Technology, (Poland)
Karol Perkuszewski, Warsaw Univ. of Technology, (Poland)
Jerzy Zielinski, Warsaw Univ. of Technology, (Poland)
Krzysztof Kierzkowski, Warsaw Univ. (Poland)

Published in SPIE Proceedings Vol. 6159:
Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments IV
Ryszard S. Romaniuk, Editor(s)

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