The DOI matches its Crossref record; 11 of the 11 references it cites were found in a registry or an index.
A laser frequency comb that enables radial velocity measurements with a precision of 1 cm s-1
Open accessAbstract
Searches for extrasolar planets using the periodic Doppler shift of stellar spectral lines have recently achieved a precision of 60 cm s-1 (ref. 1), which is sufficient to find a 5-Earth-mass planet in a Mercury-like orbit around a Sun-like star. To find a 1-Earth-mass planet in an Earth-like orbit, a precision of ∼5 cm s-1 is necessary. The combination of a laser frequency comb with a Fabry–Pérot filtering cavity has been suggested as a promising approach to achieve such Doppler shift resolution via improved spectrograph wavelength calibration, with recent encouraging results. Here we report the fabrication of such a filtered laser comb with up to 40-GHz (∼1-Å) line spacing, generated from a 1-GHz repetition-rate source, without compromising long-term stability, reproducibility or spectral resolution. This wide-line-spacing comb, or ‘astro-comb’, is well matched to the resolving power of high-resolution astrophysical spectrographs. The astro-comb should allow a precision as high as 1 cm s-1 in astronomical radial velocity measurements.
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Cites
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Temporal solitons in optical microresonators
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Universal formation dynamics and noise of Kerr-frequency combs in microresonators
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Laser Frequency Combs for Astronomical Observations
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The evolving optical frequency comb [Invited]
Diddams, S. A. (2010) · Journal of the Optical Society of America B · doi:10.1364/josab.27.000b51 · Cited by 615
Metadata
- Authors
- Li, C.-H., Benedick, A. J., Fendel, P., Glenday, A. G., Kärtner, F. X., Phillips, D. F., Sasselov, D., Szentgyorgyi, A., & Walsworth, R. L.
- Venue
- Nature
- Published
- 2008-04
- Volume
- 452
- Issue
- 7187
- Pages
- 610-612
- ISSN
- 0028-0836 (ISSN-L)
- 1476-4687
- OpenAlex
- W2035921972
- Cited by
- 469
- References
- 11
- FWCI
- 21.81
- Type
- journal article
- Language
- en
- Open access
- green
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- Li, C.-H., Benedick, A. J., Fendel, P., Glenday, A. G., Kärtner, F. X., Phillips, D. F., Sasselov, D., Szentgyorgyi, A., & Walsworth, R. L. (2008). A laser frequency comb that enables radial velocity measurements with a precision of 1 cm s-1. Nature. https://doi.org/10.1038/nature06854
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