Achieving a few cm/sec calibration repeatability for high resolution spectrographs: the laser frequency comb on HARPS

Gaspare Lo Curto; Antonio Manescau; Gerardo Avila; Luca Pasquini; Tobias Wilken; Tilo Steinmetz; Ronald Holzwarth; Rafael Probst; Thomas Udem; Theodor W. Hänsch; Jonay I. González Hernández; Massimiliano Esposito; Rafael Rebolo; Bruno Canto Martins; Jose Renan de Medeiros

doi:10.1117/12.925964

24 September 2012 Achieving a few cm/sec calibration repeatability for high resolution spectrographs: the laser frequency comb on HARPS

Gaspare Lo Curto, Antonio Manescau, Gerardo Avila, Luca Pasquini, Tobias Wilken, Tilo Steinmetz, Ronald Holzwarth, Rafael Probst, Thomas Udem, Theodor W. Hänsch, Jonay I. González Hernández, Massimiliano Esposito, Rafael Rebolo, Bruno Canto Martins, Jose Renan de Medeiros

Author Affiliations +

Proceedings Volume 8446, Ground-based and Airborne Instrumentation for Astronomy IV; 84461W (2012) https://doi.org/10.1117/12.925964
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

The laser frequency comb, with its extreme precision, opens a new window for high precision spectroscopy for current facilities, as well as for the ELT's. We report on the latest performance of the laser frequency comb obtained in combination with the HARPS spectrograph, which allowed calibration with cm/sec repeatability. The laser frequency comb system developed is described. Details of its laboratory set-up, characterization and integration with HARPS are shown. The results of the recent test campaigns are presented, showing excellent performance in terms of repeatability as well as wavelength coverage. Preliminary on sky data and next activities to integrate such a system in HARPS are presented.

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Gaspare Lo Curto, Antonio Manescau, Gerardo Avila, Luca Pasquini, Tobias Wilken, Tilo Steinmetz, Ronald Holzwarth, Rafael Probst, Thomas Udem, Theodor W. Hänsch, Jonay I. González Hernández, Massimiliano Esposito, Rafael Rebolo, Bruno Canto Martins, and Jose Renan de Medeiros "Achieving a few cm/sec calibration repeatability for high resolution spectrographs: the laser frequency comb on HARPS", Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84461W (24 September 2012); https://doi.org/10.1117/12.925964

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