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| Titel |
Laser interferometer for space-based mapping of Earth's gravity field |
| VerfasserIn |
Marina Dehne, Benjamin Sheard, Oliver Gerberding, Christoph Mahrdt, Gerhard Heinzel, Karsten Danzmann |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250042594
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| Zusammenfassung |
| Laser interferometry will play a key role in the next generation of GRACE-type satellite
gravity missions. The measurement concepts for future missions include a heterodyne laser
interferometer. Furthermore, it is favourable to use polarising components in the laser
interferometer for beam splitting. In the first step the influence of these components on the
interferometer sensitivity has been investigated. Additionally, a length stability on a nm-scale
has been validated. The next step will include a performance test of an interferometric SST
system in an active symmetric transponder setup including two lasers and two optical
benches.
The design and construction of a quasi-monolithic interferometer for comparing the
interferometric performance of non-polarising and polarising optics will be discussed. The
results of the interferometric readout of a heterodyne configuration together with polarising
optics will be presented to fulfil the phase sensitivity requirement of 1nm/-Hz-- for a typical
SSI scenario. |
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