We report on frequency measurement of the intercombination（5s^2）^1S0–（5s5p）^3P1transition of the four natural isotopes of strontium, including88^Sr（82.58%）,87^Sr（7.0%）,86^Sr（9.86%）, and84^Sr（0.56%）. A nar...We report on frequency measurement of the intercombination（5s^2）^1S0–（5s5p）^3P1transition of the four natural isotopes of strontium, including88^Sr（82.58%）,87^Sr（7.0%）,86^Sr（9.86%）, and84^Sr（0.56%）. A narrow-linewidth laser that is locked to an ultra-low expansion（ULE） optical cavity with a finesse of 12000 is evaluated at a linewidth of 200 Hz with a fractional frequency drift of 2.8×10^-13 at an integration time of 1 s. The fluorescence collector and detector are specially designed, based on a thermal atomic beam. Using a double-pass acousto-optic modulator（AOM） combined with a fiber and laser power stabilization configuration to detune the laser frequency enables high signal-to-noise ratios and precision saturated spectra to be obtained for the six transition lines, which allows us to determine the transition frequency precisely.The optical frequency is measured using an optical frequency synthesizer referenced to an H maser. Both the statistical values and the final values, including the corrections and uncertainties, are derived for a comparison with the values given in other works.展开更多
基金Supported by the National Natural Science Foundation of China(51309123)the Open Foundation of State Key Laboratory of Ocean Engineering(1407)+1 种基金‘Qing Lan Project’of Colleges and Universities in Jiangsu Provincethe collaborative innovation center funded projects in Jiangsu University(High Technology Ship category)
基金Supported by National Natural Science Foundation of China(51309123)the Open Foundation of State Key Laboratory of Ocean Engineering(1407)Sponsored by‘Qing Lan Project’of Colleges and Universities in Jiangsu Province and the Collaborative Innovation Center Funded Projects in Jiangsu University(High Technology Ship Category)
基金Supported by National Key Basic Research and Development Program(973)(No.2013CB036104)the National Natural Science Foundation of China(51309123)+3 种基金the Open Foundation of State Key Laboratory of Ocean Engineering(1407)‘Qing Lan Project’ of Colleges and Universities in Jiangsu ProvinceAcademic Program Development of Jiangsu Higher Education Institutions(PAPD)the Collaborative Innovation Center Funded Projects in Jiangsu University(High Technology Ship Category)
基金Project supported by the National Natural Science Foundation of China(Grant No.61127901)the Key Project of the Chinese Academy of Sciences(Grant No.KJZD-EW-W02)
文摘We report on frequency measurement of the intercombination（5s^2）^1S0–（5s5p）^3P1transition of the four natural isotopes of strontium, including88^Sr（82.58%）,87^Sr（7.0%）,86^Sr（9.86%）, and84^Sr（0.56%）. A narrow-linewidth laser that is locked to an ultra-low expansion（ULE） optical cavity with a finesse of 12000 is evaluated at a linewidth of 200 Hz with a fractional frequency drift of 2.8×10^-13 at an integration time of 1 s. The fluorescence collector and detector are specially designed, based on a thermal atomic beam. Using a double-pass acousto-optic modulator（AOM） combined with a fiber and laser power stabilization configuration to detune the laser frequency enables high signal-to-noise ratios and precision saturated spectra to be obtained for the six transition lines, which allows us to determine the transition frequency precisely.The optical frequency is measured using an optical frequency synthesizer referenced to an H maser. Both the statistical values and the final values, including the corrections and uncertainties, are derived for a comparison with the values given in other works.
