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Q: Fachverband Quantenoptik und Photonik

Q 35: Precision Measurements and Metrology IV

Q 35.9: Vortrag

Mittwoch, 10. März 2010, 18:30–18:45, A 310

Quasi-monolithic Interferometer for the Examination of the fundamental Non-reciprocity of a single-mode polarization maintaining Fiber for space Applications — •Roland Fleddermann, Christian Diekmann, Frank Steier, Michael Tröbs, Gerhard Heinzel und Karsten Danzmann — Albert-Einstein-Institut Hannover, Max-Planck-Institut für Gravitationsphysik und Universität Hannover, Callinstr. 38, 30167 Hannover

The Laser Interferometer Space Antenna (LISA) mission by ESA and NASA for the detection of gravitational waves in the frequency range from 0.1 mHz to 1 Hz requires optical fibers for the exchange of light between optical benches on satellites.

Reciprocal noise can be subtracted in this application, but non-reciprocal noise would limit the measurement sensitivity. Therefore, a quasi-monolithic, interferometric measurement setup was developed that is capable of measuring non-reciprocal phase variations with a sensitivity of ≈ 6 µrad/√Hz (corresponding to 1 pm/√Hz at 1064 nm). The measurement principle of this setup resembles the actual application on board LISA. Using this setup a measurement noise between 4 µrad/√Hz and 400  µrad/√Hz (≈ 0.6−60 pm/√Hz at 1064 nm) was observed for frequencies ranging from 1 mHz to 1 Hz.

We give an overview over first results of the non-reciprocal fiber noise obtained using this setup and on investigations on the influence of external noise sources.