Optical Frequency Comb Calibrated Near Infrared Solar Heterodyne Spectroscopy
Connor Fredrick, Freja Olsen, Ryan Terrien, Suvrath Mahadevan,, Franklyn Quinlan, Scott Diddams
TL;DR
This paper demonstrates a high-resolution near-infrared heterodyne spectroscopy technique calibrated with an optical frequency comb, enabling precise solar spectral measurements with absolute frequency accuracy.
Contribution
It introduces a novel calibration method using an optical frequency comb for near-infrared heterodyne spectroscopy of solar radiation.
Findings
Achieved a resolving power of 2,000,000.
Provided absolute frequency traceability in solar spectroscopy.
Enabled precise calibration of laser tuning using a frequency comb.
Abstract
We perform heterodyne spectroscopy at 1.56 micron with a tunable laser and thermal radiation from the Sun. The laser tuning is calibrated with a frequency comb, providing a simple spectrometer with absolute frequency tracebility and resolving power of 2,000,000
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