Development of optical fiber technology in Poland 2015
The paper is a digest of works presented during the XVIth National Symposium on Optical Fibres and Their Applications. The Symposium is organized since 1976. OFTA 2015 was organized by Optical Fibre Laboratory of the Faculty of Chemistry at University of Maria Curie Skłodowska, and Institute of Electronics and Information Technology of Lublin University of Technology, in Nałęczów on 22-25 September 2015. The meeting has gathered around 120 participants who presented 85 research and technical papers. The Symposium organized every 18 months is a good portrait of optical fibre technology development in Poland at university laboratories, governmental institutes, company R&D laboratories, etc. Topical tracks of the Symposium were: optical and photonic materials, technology of classical, tailored and structural photonic optical fibres, light propagation physics in optical fibres, passive and active optical fibre components, optical fibre sensors, passive and active optical fibre networks, optical fibre amplifiers and lasers, optical fibre network issues: modulation, architectures, economy, etc.
Digital techniques for noise reduction in CCD detectors
Charge Coupled Devices (CCDs) have been recently commonly used in many advanced scientific and industrial research projects. They became especially popular in astronomy observations like the "Pi of the Sky" experiment. This paper describes the hardware being developed for the needs of this experiment to allow applying certain digital readout and noise reduction techniques developed for ultra-sensitive CCD detectors. Full Text: PDF References: G. Kasprowicz et al., Phot. Lett. of Poland, 1(2), 82 (2009). M. Biskup et al., Proc. SPIE 6347, 63470L (2006). [CrossRef] J.L. Gach et al., Proc. Astrophys. Sp. Scien. Libr. 300, 611 (2004). [CrossRef] P. Centen, CCD Imaging – Concepts for Low Noise and High Bandwidth (PhD thesis, Technische Universiteit Eindhoven 1999). D.J. Hegyi, A. Burrows, Astrophys. Jour. 85(10), 1421 (1980). A. Burd, M. Cwiok, H. Czyrkowski, R. Dąbrowski, W. Dominik, M. Grajda, M. Husejko, A. Kalicki, G. Kasprowicz, K. Poźniak, R. Romaniuk, W. Zabolotny, New Astron. 5, 409 (2005) A. Burd, M. Cwiok, M. Grajda, M. Gorski, G. Kasprowicz, K. Malek, J. Mrowca-Ciulacz, K. Nawrocki, K. Poźniak, R. Romaniuk, S. Stankiewicz, Proc. SPIE 6159, 61590H (2006). [CrossRef] A. Burd, M. Cwiok, H. Czyrkowski, R. Dąbrowski, W. Dominik, M. Grajda, G. Kasprowicz, K. Krupska, K. Nawrocki, K. Poźniak, R. Romaniuk, R. Salanski, Proc. SPIE 5948, 469 (2005). [CrossRef] M. Cwiok, W. Dominik, M. Husejko, A. Kalicki, G. Kasprowicz, K. Kierzkowski, K. Poźniak, R. Romaniuk, G. Wrochna, W. Zabolotny, Proc. SPIE 5484, 283 (2004). [CrossRef] G. Kasprowicz, L. Mankiewicz, K. Poźniak, R. Romaniuk, S. Stankiewicz, G. Wrochna, Proc. SPIE 6937, 693709 (2007). [CrossRef] G. Kasprowicz, H. Czyrkowski, R. Dabrowski, W. Dominik, L. Mankiewicz, K. Poźniak, R. Romaniuk, P. Sitek, M. Sokolowski, R. Sulej, J. Uzycki, G. Wrochna, Proc. SPIE 6347, 63470N (2006). [CrossRef] M. Kwiatkowski, G. Kasprowicz, D. Rybka, R. Romaniuk, K. Poźniak, Proc. SPIE 6937, 69370A (2007). [CrossRef] M. Kwiatkowski, G. Kasprowicz, K. Poźniak, R. Romaniuk, G. Wrochna, Proc. SPIE 7124, 71240F (2008). [CrossRef] M. Kwiatkowski, G. Kasprowicz, K. Poźniak, R. Romaniuk, G. Wrochna, Electr. and Telecom. Quart. 3, 253 (2008). M. Kwiatkowski, G. Kasprowicz, K. Poźniak, R. Romaniuk, G. Wrochna, Elektronika- konstrukcje, technologie, zastosowania, 10, 42 (2008). R. Romaniuk, K. Poźniak, Meas. Scien. Techn. 18 (8), E01 (2007).
Fiber-optic link for the RF phase reference distribution system for the XFEL and TESLA projects
The UV Free-Electron Laser (UVFEL) and The TeV-Energy Superconducting Linear Accelerator (TESLA) projects will require phase synchronization of 0.1 ps short term (millisecond), 1 ps short term (minutes) and 10 ps long term (days). The stringent synchronization requirement of 10fs was given for the X-Ray Free- Electron Laser (XFEL). To fufill this requirement the XFEL may use a fiber laser as reference generator. But this requirement applies for a special location only, therefore the RF phase reference distribution system developed UVFEL and TESLA will also be used in the XFEL. The RF phase reference distribution system must deliver phase stable signals to hundreds of stations over a length of 33 km. Long, optical fiber based links are planned to be an important part of the entire distribution system. This paper describes the concept of a long optical link, with a feedback system suppressing long term drifts of the RF signal phase. Stability requirements are given and most important design issues affecting system performance are discussed. Finally, an experimental setup and measurement results demonstrating system performance is shown.