Demonstration of a Near-IR Laser Comb for Precision Radial Velocity Measurements in Astronomy

Abstract

We describe a successful effort to produce a laser comb around 1.55 $\mu$m in the astronomical H band using a method based on a line-referenced, electro-optical-modulation frequency comb. We discuss the experimental setup, laboratory results, and proof of concept demonstrations at the NASA Infrared Telescope Facility (IRTF) and the Keck-II telescope. The laser comb has a demonstrated stability of $<$ 200 kHz, corresponding to a Doppler precision of ~0.3 m/s. This technology, when coupled with a high spectral resolution spectrograph, offers the promise of $<$1 m/s radial velocity precision suitable for the detection of Earth-sized planets in the habitable zones of cool M-type stars.

References in corpus (8)

• A laser frequency comb that enables radial velocity measurements with a precision of 1 cm s${}^{-1}$
• High-precision wavelength calibration of astronomical spectrographs with laser frequency combs
• Full Stabilization of a Microresonator based Optical Frequency Comb
• Instrumentation for the detection and characterization of exoplanets
• Astronomical spectrograph calibration with broad-spectrum frequency combs
• Calibrating echelle spectrographs with Fabry-Perot etalons
• Development of Fiber Fabry-Perot Interferometers as Stable Near-infrared Calibration Sources for High Resolution Spectrographs
• Self-referencing a continuous-wave laser with electro-optic modulation

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