| Zugriffsnummer | 35913 |
| Dokumenttyp | Konferenzartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | SI-traceable high-accuracy EDM based on multi-wavelength interferometry |
| Autor(in); Institution |
Pollinger, Florian; 5.4, Interferometrie an Maßverkörperungen, PTB-Braunschweig
Mildner, Jutta; 5.4, Interferometrie an Maßverkörperungen, PTB-Braunschweig
Köchert, Paul; 5.2, Dimensionelle Nanometrologie, PTB-Braunschweig
Yang, Ruitao; 5.4, Interferometrie an Maßverkörperungen, PTB-Braunschweig
Bosnjakovic, Alen; Institut za mjeriteljstvo Bosne i Hercegovine (IMBiH), Sarajevo, BOSNIA AND HERZEGOVINA
Meyer, Tobias; 5.4, Interferometrie an Maßverkörperungen, PTB-Braunschweig
Wedde, Martin; 5.4, Interferometrie an Maßverkörperungen, PTB-Braunschweig
Meiners-Hagen, Karl; 5.4, Interferometrie an Maßverkörperungen, PTB-Braunschweig
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| Quelle/Jahr | 3rd Joint International Symposium on Deformation Monitoring: Proceedings:(2016), 8 S. |
| Availability | [USB-Stick] ; file name: JISDM_2016_submission_15.pdf |
| Konferenzangaben | 3rd Joint International Symposium on Deformation Monitoring, Vienna, 30, March - 01, April, 2016, Austria |
| Freie Schlagworte | EDM ; multi-wavelength interferometry ; index of refraction ; EMRP JRP SIB60 Surveying |
| Zusammenfassung | An electro-optical distance measurement with an uncertainty below 1 ppm over distances of several hundreds of metres requires two challenges to be overcome: for once, the optical distance measurement must be performed with a respective measurement precision, and in addition, the index of refraction needs to be determined at the same level of uncertainty. These requirements are non-trivial, in particular in the uncontrolled environment typical for surveying. At the Physikalisch-Technische Bundesanstalt (PTB), the German national metrology institute, multi-wavelength interferometry (MWLI) is investigated to find solutions to both problems. It is based on the combined analysis of the interferometric phase information of several well defined single mode lasers. The realization of this electro-optical technique benefits from modern optical sources and developments in beam manipulation. Two approaches to MWLI based EDM developed in the frame of the European Joint Research Project EMRP SIB60 Surveying will be presented: Optical frequency combs are ideal sources for MWLI as they provide thousands of individual laser lines in parallel. However, unconventional measurement schemes are required to benefit from this property. We developed a novel method to access the available phase information and to enable a one-shot distance measurement with a macroscopic range, but potentially nanoscopic uncertainty and performed first proof-of-principle experiments of this potential approach. Using robust high performance solid state lasers as sources, we developed in parallel the so-called TeleYAG system, a distance meter intended as a primary standard for the calibration of geodetic baselines. Nonlinear frequency-doubling and heterodyne MWLI enable a robust realization of dispersion-based refractivity-compensation. The optical set-up of the interferometer head was optimized for robustness, and the performance of the whole system was investigated in the field during measurement campaigns at three major baselines in Europe. |
Zitierung
Pollinger, F., Mildner, J., Köchert, P., Yang, R., Bosnjakovic, A., Meyer, T., Wedde, M., & Meiners-Hagen, K. (2016). SI-traceable high-accuracy EDM based on multi-wavelength interferometry. 3rd Joint International Symposium on Deformation Monitoring, Vienna, 30, March - 01, April, 2016, Austria.