Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 273-279 |
| Journal | Journal of the Optical Society of America B: Optical Physics |
| Volume | 20 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2003 |
| MoE publication type | A1 Journal article-refereed |
Fingerprint
Cite this
}
All-optical atomic clock based on coherent population trapping in 85Rb. / Merimaa, Mikko (Corresponding Author); Lindvall, Thomas; Tittonen, I.; Ikonen, E.
In: Journal of the Optical Society of America B: Optical Physics, Vol. 20, No. 2, 2003, p. 273-279.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - All-optical atomic clock based on coherent population trapping in 85Rb
AU - Merimaa, Mikko
AU - Lindvall, Thomas
AU - Tittonen, I.
AU - Ikonen, E.
PY - 2003
Y1 - 2003
N2 - An all-optical microwave frequency standard based on coherent population trapping (CPT) in 85Rb is developed. The CPT resonances are detected by an ordinary edge-emitting diode laser in a simple optical setup. A buffer-gas mixture is carefully optimized to yield a narrow linewidth and a reduced temperature dependence of the resonance frequency. With the developed system we are able to measure ultranarrow optically induced hyperfine CPT resonances at <20 Hz, which is in good agreement with the linewidth calculated from experimental parameters. The frequency of an RF-signal generator has been stabilized to the CPT resonance between the two m=0mF=0 magnetic sublevels. The relative frequency stability (square root of Allan variance) follows a slope of 3.5×10−11 τ−1/2(1 s<τ<2000 s). The best stability of 6.4×10−13 is reached at an integration time of τ=2000 s. This stability is sufficient for many high-precision applications. Frequency-shift measurements were made to evaluate the frequency dependencies on the operation parameters.
AB - An all-optical microwave frequency standard based on coherent population trapping (CPT) in 85Rb is developed. The CPT resonances are detected by an ordinary edge-emitting diode laser in a simple optical setup. A buffer-gas mixture is carefully optimized to yield a narrow linewidth and a reduced temperature dependence of the resonance frequency. With the developed system we are able to measure ultranarrow optically induced hyperfine CPT resonances at <20 Hz, which is in good agreement with the linewidth calculated from experimental parameters. The frequency of an RF-signal generator has been stabilized to the CPT resonance between the two m=0mF=0 magnetic sublevels. The relative frequency stability (square root of Allan variance) follows a slope of 3.5×10−11 τ−1/2(1 s<τ<2000 s). The best stability of 6.4×10−13 is reached at an integration time of τ=2000 s. This stability is sufficient for many high-precision applications. Frequency-shift measurements were made to evaluate the frequency dependencies on the operation parameters.
U2 - 10.1364/JOSAB.20.000273
DO - 10.1364/JOSAB.20.000273
M3 - Article
VL - 20
SP - 273
EP - 279
JO - Journal of the Optical Society of America B: Optical Physics
JF - Journal of the Optical Society of America B: Optical Physics
SN - 0740-3224
IS - 2
ER -