All-optical atomic clock based on coherent population trapping in 85Rb

@article{citeulike:2274714, abstract = {An all-optical microwave frequency standard based on coherent population trapping (CPT) in 85 Rb 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 F =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.}, author = {Merimaa, Mikko and Lindvall, Thomas and Tittonen, Ilkka and Ikonen, Erkki }, citeulike-article-id = {2274714}, journal = {J. Opt. Soc. Am. B}, keywords = {atomic-clock, bp, cpt}, month = {February}, number = {2}, pages = {273--279}, posted-at = {2008-01-22 16:06:58}, priority = {0}, publisher = {OSA}, title = {All-optical atomic clock based on coherent population trapping in 85Rb}, url = {http://www.opticsinfobase.org/abstract.cfm?id=71157}, volume = {20}, year = {2003} }

TY - JOUR ID - citeulike:2274714 L3 - citeulike-article-id:2274714 TI - All-optical atomic clock based on coherent population trapping in 85Rb JF - J. Opt. Soc. Am. B VL - 20 IS - 2 SP - 273 EP - 279 PB - OSA N2 - An all-optical microwave frequency standard based on coherent population trapping (CPT) in 85 Rb 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 F =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. KW - atomic-clock KW - bp KW - cpt AU - Merimaa, Mikko AU - Lindvall, Thomas AU - Tittonen, Ilkka AU - Ikonen, Erkki PY - 2003/02/01/ UR - http://www.opticsinfobase.org/abstract.cfm?id=71157 ER -