Hannover 2010 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 49: Precision Measurements and Metrology VI

Q 49.6: Talk

Thursday, March 11, 2010, 15:15–15:30, A 310

Inter-spacecraft laser ranging and data communication for LISA — •Juan Jose Esteban Delgado, Antonio Garcia Marin, Johannes Eichholz, Iouri Bykov, Joachim Kullmann, Gerhard Heinzel, and Karsten Danzmann — Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut) and Leibniz Universität Hannover

The LISA phase measurement system (PMS) will provide interferometric phase readout of the primary heterodyne signal at microcycle sensitivity, ranging measurements at sub-meter accuracy and data communication at rates of several kilobits per seconds. Our investigations are focused on inter-spacecraft laser ranging and data transfer for LISA using Direct Sequence Spread Spectrum (DS/SS) modulation onto the laser links. We present the setup of an optical experimental to test the levels of performance achievable with a single laser link as well as a new hardware prototype based on FPGA (Field Programmable Gate Array) processing to perform high-accuracy phase readout of the optical signal, ranging measurements, data communication and is suitable for clock noise demodulation and digital laser-phase locking.