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Journal Article

Heterodyne laser tracking at high Doppler rates

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Danzmann,  Karsten
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Citation

Hellings, R., Giampieri, G., Maleki, L., Tinto, M., Danzmann, K., Hough, J., et al. (1996). Heterodyne laser tracking at high Doppler rates. Optics Communications, 124(3-4), 313-320. doi:10.1016/0030-4018(95)00684-2.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-5B55-3
Abstract
A design is described for a transmitter/receiver system that may be used in a spaceborne laser heterodyne tracking system to produce a high-precision interferometer. We present a two-color laser scheme that enables accurate phase measurement even in the presence of a large Doppler offset between the incoming and outgoing signals. The beat note between the two lasers provides a built-in frequency reference, while the delay line produced by the travel time of the tracking signal provides a stable self-comparison that measures drift in the frequency reference so that it may be corrected for. The resulting noise in the link is only the residual laser phase jitter and the shot noise in the phase measurement.