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Proceedings Paper

Improved fiber-optic link for the phase reference distribution system for the TESLA technology based projects
Author(s): Krzysztof Czuba; Matthias Felber
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Paper Abstract

The UV Free-Electron Laser (UVFEL) [1], The X-Ray Free-Electron Laser (XFEL) [2] and The International Linear Accelerator (ILC) [9] projects will require phase synchronization of various RF frequency subsystems on kilometer distances with accuracy better than 1ps. To fulfill these requirements, a phase reference distribution system concept was proposed and a prototype was developed for tests in the TESLA Test Facility 2 (TTF2). An important part of the phase reference system is the fiber-optic phase stable, long distance link described in this paper. An interferometrical scheme with feedback on phase, suppressing long term phase drifts induced by temperature changes was developed and tested in laboratory and under accelerator conditions. A motorized optical delay line was used in the system to compensate for phase errors. Described are error considerations and most important project issues like the hardware development and the real time phase controller software. The presented measurement results satisfy the design requirements. Experience gained during the experiments yielded proposals for system improvements.

Paper Details

Date Published: 11 October 2005
PDF: 8 pages
Proc. SPIE 5948, Photonics Applications in Industry and Research IV, 59480B (11 October 2005); doi: 10.1117/12.622691
Show Author Affiliations
Krzysztof Czuba, Warsaw Univ. of Technology (Poland)
Matthias Felber, DESY (Germany)

Published in SPIE Proceedings Vol. 5948:
Photonics Applications in Industry and Research IV
Ryszard S. Romaniuk; Stefan Simrock; Vladimir M. Lutkovski, Editor(s)

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