Calibrating an Ultra-Low Expansion Cavity for High Precision Spectroscopy From 630 THz to 685 THz Using Molecular Tellurium Lines
Review of Scientific Instruments
We report on the calibration of a temperature stabilized ultra-low expansion (ULE) cavity using previously measured molecular tellurium and atomic cesium lines. By means of a dual frequency modulation technique, the frequency dependence of the free spectral range of the ULE cavity is measured and was found to vary by less than 60 Hz over the ∼55 THz range of the calibration. This method of calibration enables the ULE cavity to measure absolute frequencies to better than 1.5 MHz.
Hyperfine structure, Signal generators, Signal processing, Chemical elements, Optical resonators, Lasers, Precision spectroscopy, Photodetectors, Frequency combs, Optical properties
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Williams, William, "Calibrating an Ultra-Low Expansion Cavity for High Precision Spectroscopy From 630 THz to 685 THz Using Molecular Tellurium Lines" (2018). Physics: Faculty Publications, Smith College, Northampton, MA.