Development of Monolithic Michelson Interferometer for RV measurement in IR

Ji Wang; Xiaoke Wan; Jian C. Ge

doi:10.1117/12.857255

21 July 2010 Development of Monolithic Michelson Interferometer for RV measurement in IR

Ji Wang, Xiaoke Wan, Jian C. Ge

Proceedings Volume 7734, Optical and Infrared Interferometry II; 77343Q (2010) https://doi.org/10.1117/12.857255
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

We present a fixed delay interferometer to be installed in IR-ET (Infra-Red Exoplanets Tracker). We introduce the design, fabrication and testing processes. In particular, we present a new methodology of computing the fundamental limit of radial velocity (RV) measurement given by photon noise for DFDI (Dispersed Fixed Delay Interferometer) method as opposed to conventional echelle method. The new method is later used to determine the optical path difference (OPD) of the IR-ET interferometer. In addition, we introduce a novel method of monitoring the stability of the interferometer for IR-ET in broad-band using fourier-transform white-light scanning interferometry technique. The new method can be potentially expanded and applied to thermo-optic effect measurement if temperature control system is introduced into the experiment. The thermal response of the optical system is 3500 m/s/°C. We find that the RV calibration precision of 'Bracketing' method is 1.74 m/s without temperature control.

Citation Download Citation

Ji Wang, Xiaoke Wan, and Jian C. Ge "Development of Monolithic Michelson Interferometer for RV measurement in IR", Proc. SPIE 7734, Optical and Infrared Interferometry II, 77343Q (21 July 2010); https://doi.org/10.1117/12.857255

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