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arXiv · 1110.0011

Quantum-noise-limited optical frequency comb spectroscopy

Aleksandra Foltynowicz·Ticijana Ban·Piotr Maslowski·Florian Adler·Jun Ye
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Abstract

We achieve a quantum-noise-limited absorption sensitivity of 1.7/times10$^{-12}$ cm$^{-1}$ per spectral element at 400 s of acquisition time with cavity-enhanced frequency comb spectroscopy, the highest demonstrated for a comb-based technique. The system comprises a frequency comb locked to a high-finesse cavity and a fast-scanning Fourier transform spectrometer with an ultra-low-noise autobalancing detector. Spectra with a signal-to-noise ratio above 1000 and a resolution of 380 MHz are acquired within a few seconds. The measured absorption lineshapes are in excellent agreement with theoretical predictions.

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Aleksandra Foltynowicz, Ticijana Ban, Piotr Maslowski, Florian Adler, Jun Ye. 2011-09-30. Quantum-noise-limited optical frequency comb spectroscopy. https://doi.org/10.1103/physrevlett.107.233002

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