A microresonator-based etalon for visible light precision radial velocity measurements

Stephanie Leifer; Anatoliy Savchenkov; Abdelkrim El Amili; Charles Beichman; Andrey Matsko; Yu-Hung Lai; Stuart Love; Dmitri Strekalov; Christian Schwab; Lute Maleki; Samuel Halverson; Ian Coddington; Mahmood Bagheri

doi:10.1117/12.2562369

13 December 2020 A microresonator-based etalon for visible light precision radial velocity measurements

Stephanie Leifer, Anatoliy Savchenkov, Abdelkrim El Amili, Charles Beichman, Andrey Matsko, Yu-Hung Lai, Stuart Love, Dmitri Strekalov, Christian Schwab, Lute Maleki, Samuel Halverson, Ian Coddington, Mahmood Bagheri

Author Affiliations +

Proceedings Volume 11447, Ground-based and Airborne Instrumentation for Astronomy VIII; 114471L (2020) https://doi.org/10.1117/12.2562369
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

We report on our efforts to develop a whispering gallery mode resonator etalon as a tool for precision radial velocity observations to detect exoplanets. The crystalline MgF₂ etalon will be referenced to a compact fiber laser frequency comb, and will serve as the wavelength calibration source for a stabilized, high resolution, visible band spectrograph. The extreme stability required for the detection and characterization of exo-Earths orbiting solar-type stars will be achieved by employing a composite resonator structure with a compensating material to balance the resonator’s coefficients of thermal expansion and thermal refractivity. Progress in modeling the etalon to achieve single mode-like performance, and experiments to demonstrate broad-band (octave-spanning) ling to a white light source, are described.

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Stephanie Leifer, Anatoliy Savchenkov, Abdelkrim El Amili, Charles Beichman, Andrey Matsko, Yu-Hung Lai, Stuart Love, Dmitri Strekalov, Christian Schwab, Lute Maleki, Samuel Halverson, Ian Coddington, and Mahmood Bagheri "A microresonator-based etalon for visible light precision radial velocity measurements", Proc. SPIE 11447, Ground-based and Airborne Instrumentation for Astronomy VIII, 114471L (13 December 2020); https://doi.org/10.1117/12.2562369

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