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Proceedings Paper

Monolithic interferometer for high precision radial velocity measurements
Author(s): Xiaoke Wan; Jian Ge; Ji Wang; Brian Lee
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Paper Abstract

In high precision radial velocity (RV) measurements for extrasolar planets searching and studies, a stable wide field Michelson interferometer is very critical in Exoplanet Tracker (ET) instruments. Adopting a new design, monolithic interferometers are homogenous and continuous in thermal expansion, and field compensation and thermal compensation are both satisfied. Interferometer design and fabrication are decrypted in details. In performance evaluations, field angle is typically 22° and thermal sensitivity is typically -1.7 x 10-6/°C, which corresponds to ~500 m/s /°C in RV scale. In interferometer stability monitoring using a wavelength stabilized laser source, phase shift data was continuously recorded for nearly seven days. Appling a frequent calibration every 30 minutes as in typical star observations, the interferometer instability contributes less than 1.4 m/s in RV error, in a conservative estimation.

Paper Details

Date Published: 10 September 2009
PDF: 12 pages
Proc. SPIE 7424, Advances in Optomechanics, 742406 (10 September 2009); doi: 10.1117/12.825747
Show Author Affiliations
Xiaoke Wan, Bryant Space Science Ctr., Univ. of Florida (United States)
Jian Ge, Bryant Space Science Ctr., Univ. of Florida (United States)
Ji Wang, Bryant Space Science Ctr., Univ. of Florida (United States)
Brian Lee, Bryant Space Science Ctr., Univ. of Florida (United States)


Published in SPIE Proceedings Vol. 7424:
Advances in Optomechanics
Alson E. Hatheway, Editor(s)

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