Details
| Original language | English |
|---|---|
| Article number | 33973 |
| Journal | Scientific reports |
| Volume | 6 |
| Publication status | Published - 26 Sept 2016 |
Abstract
The increasing performance of optical lattice clocks has made them attractive for scientific applications in space and thus has pushed the development of their components including the interrogation lasers of the clock transitions towards being suitable for space, which amongst others requires making them more power efficient, radiation hardened, smaller, lighter as well as more mechanically stable. Here we present the development towards a space-compatible interrogation laser system for a strontium lattice clock constructed within the Space Optical Clock (SOC2) project where we have concentrated on mechanical rigidity and size. The laser reaches a fractional frequency instability of 7.9 × 10-16 at 300 ms averaging time. The laser system uses a single extended cavity diode laser that gives enough power for interrogating the atoms, frequency comparison by a frequency comb and diagnostics. It includes fibre link stabilisation to the atomic package and to the comb. The optics module containing the laser has dimensions 60 × 45 × 8 cm3; and the ultra-stable reference cavity used for frequency stabilisation with its vacuum system takes 30 × 30 × 30 cm3. The acceleration sensitivities in three orthogonal directions of the cavity are 3.6 × 10-10 /g, 5.8 × 10-10/g and 3.1 × 10-10/g, where g ≈ 9.8 m/s2 is the standard gravitational acceleration.
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In: Scientific reports, Vol. 6, 33973, 26.09.2016.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Ultra-stable clock laser system development towards space applications
AU - Swierad, Dariusz
AU - Häfner, Sebastian
AU - Vogt, Stefan
AU - Venon, Bertrand
AU - Holleville, David
AU - Bize, Sébastien
AU - Kulosa, André
AU - Bode, Sebastian
AU - Singh, Yeshpal
AU - Bongs, Kai
AU - Rasel, Ernst Maria
AU - Lodewyck, Jérôme
AU - Le Targat, Rodolphe
AU - Lisdat, Christian
AU - Sterr, Uwe
N1 - Funding information: The research leading to these results has received funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement No. 263500. D.S. acknowledges the support from the FP7 Marie Curie Actions of the European Commission, via the Initial Training Network QTea (contract-No. MCITN- 317485). S.V., S.H. and A.K. acknowledge funding from the Deutsche Forschungsgemeinschaft DFG via RTG 1729. Authors also would like to thank S. Schiller for initiating and coordinating the Space Optical Clock project and C. Gill and P. Knowles for thorough proofreading.
PY - 2016/9/26
Y1 - 2016/9/26
N2 - The increasing performance of optical lattice clocks has made them attractive for scientific applications in space and thus has pushed the development of their components including the interrogation lasers of the clock transitions towards being suitable for space, which amongst others requires making them more power efficient, radiation hardened, smaller, lighter as well as more mechanically stable. Here we present the development towards a space-compatible interrogation laser system for a strontium lattice clock constructed within the Space Optical Clock (SOC2) project where we have concentrated on mechanical rigidity and size. The laser reaches a fractional frequency instability of 7.9 × 10-16 at 300 ms averaging time. The laser system uses a single extended cavity diode laser that gives enough power for interrogating the atoms, frequency comparison by a frequency comb and diagnostics. It includes fibre link stabilisation to the atomic package and to the comb. The optics module containing the laser has dimensions 60 × 45 × 8 cm3; and the ultra-stable reference cavity used for frequency stabilisation with its vacuum system takes 30 × 30 × 30 cm3. The acceleration sensitivities in three orthogonal directions of the cavity are 3.6 × 10-10 /g, 5.8 × 10-10/g and 3.1 × 10-10/g, where g ≈ 9.8 m/s2 is the standard gravitational acceleration.
AB - The increasing performance of optical lattice clocks has made them attractive for scientific applications in space and thus has pushed the development of their components including the interrogation lasers of the clock transitions towards being suitable for space, which amongst others requires making them more power efficient, radiation hardened, smaller, lighter as well as more mechanically stable. Here we present the development towards a space-compatible interrogation laser system for a strontium lattice clock constructed within the Space Optical Clock (SOC2) project where we have concentrated on mechanical rigidity and size. The laser reaches a fractional frequency instability of 7.9 × 10-16 at 300 ms averaging time. The laser system uses a single extended cavity diode laser that gives enough power for interrogating the atoms, frequency comparison by a frequency comb and diagnostics. It includes fibre link stabilisation to the atomic package and to the comb. The optics module containing the laser has dimensions 60 × 45 × 8 cm3; and the ultra-stable reference cavity used for frequency stabilisation with its vacuum system takes 30 × 30 × 30 cm3. The acceleration sensitivities in three orthogonal directions of the cavity are 3.6 × 10-10 /g, 5.8 × 10-10/g and 3.1 × 10-10/g, where g ≈ 9.8 m/s2 is the standard gravitational acceleration.
UR - http://www.scopus.com/inward/record.url?scp=84988932367&partnerID=8YFLogxK
U2 - 10.1038/srep33973
DO - 10.1038/srep33973
M3 - Article
AN - SCOPUS:84988932367
VL - 6
JO - Scientific reports
JF - Scientific reports
SN - 2045-2322
M1 - 33973
ER -