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The continued remarkable advances in optical clocks and oscillators has led to a parallel strong development of optical clock networks [1]. Such networks have the potential to support a wide range of applications from basic time/frequency dissemination, to clock-based geodesy, to tests of general relativity [1]. To support optical clocks/oscillators at their highest accuracy and precision, these networks...
We present open-air trace-gas spectroscopy utilizing a mid-infrared frequency comb. The MIR beam spanning 300 nm propagates through 26 m of atmosphere and absorption spectra are collected in 2 ms with a Virtual-Image Phased-Array spectrometer.
Frequency combs have enabled a wide range of applications because of their unique combination of coherence and broad bandwidth. The comb provides 100,000's of comb teeth at precise, well-known optical frequencies that can support broadband accurate spectroscopy or multi-wavelength interfometric ranging. However, the full advantages of the comb can be realized as a source for these and other applications...
The linearity of actively stabilized laser chirp from approximately 1530 to 1570 nm is measured by use of an optical frequency comb showing residuals of < 60 kHz after removing low order dispersion related effects.
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