期刊
PHYSICAL REVIEW LETTERS
卷 107, 期 23, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.107.233002
关键词
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资金
- Swedish Research Council
- Fulbright fellowship
- Polish Ministry of Science and Higher Education
- AFOSR
- DTRA
- NIST
- NSF
- Agilent
- Division Of Physics
- Direct For Mathematical & Physical Scien [1125844] Funding Source: National Science Foundation
We achieve a quantum-noise-limited absorption sensitivity of 1.7 x 10(-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 ultralow-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 line shapes are in excellent agreement with theoretical predictions.
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