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1.
Han Seb Moon 《Optics Communications》2011,284(5):1327-1330
We observed hyperfine structures of the 4D5/2 state of 85Rb atoms and applied them to the frequency stabilization of a laser diode by using the double resonance optical pumping (DROP). The hyperfine structures of the 4D5/2 states of 85Rb atoms were highly resolved in the Rb vapor cell. We compared the DROP with the optical-optical double resonance (OODR) in the 5S1/2-5P3/2-4D5/2 ladder-type system of 85Rb atoms. When we stabilized the frequency of a laser diode to the hyperfine structure of the 5P3/2(F″ = 4)-4D5/2(F″ = 3) transition by using the DROP spectrum, the frequency stability was approximately 2.3 × 10− 12 after 100 s. 相似文献
2.
It is shown experimentally that use of fluorescence and transmission spectra obtained from nanocells with the thickness of
column of rubidium atomic vapor L = λ/2 and L = λ, respectively (λ = 794 nm is the wavelength of laser radiation close to resonance with D
1-line transition of Rb atoms), by means of a narrowband diode laser allows spectral separation and study of variations of
probabilities of atomic transitions between ground and excited states of hfs of D
1 lines of 85Rb and 87Rb atoms in the range of magnetic fields from 10 to 5000 G. Small thickness of atomic vapor column (∼390 nm and ∼794 nm) allows
applying permanent magnets simplifying essentially creation of strong magnetic fields. Advantages of this technique are discussed
as compared with the technique of saturated absorption. The obtained results show that a nanocell with submicrom thickness
of vapor column may serve as a basis for designing a magnetometer with submicron local spatial resolution which is important
in case of measuring strongly inhomogeneous magnetic fields. Experimental data are in good agreement with the theoretical
results. 相似文献
3.
为了得到在高背景噪音下对弱信号光的提取,实验研究了基于87Rb D1线5S1/2F=2→5P1/2 F'=1跃迁的795 nm法拉第反常色散光学滤波器.充铷的样品池所含87Rb的比例高于自然铷,样品池处在均匀的磁场中并且夹在两个相互正交的偏振片之间.入射的探测光通过样品池,与原子相互作用,由于法拉第旋转效应实现滤波功能.改变实验条件,透射结果随之明显变化.当温度从340 K升高到360 K,透射谱的变化情况被细致记录,并且分析了导致透射情况变化的原因.在适当的工作温度以及磁场条件下,得到线宽为约220 MHz的超窄带透射谱线,谱线透过率约为48%.87Rb D1线的实验结果优于85Rb的吸收线. 相似文献
4.
5.
G. Hakhumyan D. Sarkisyan A. Sargsyan A. Atvars M. Auzinsh 《Optics and Spectroscopy》2010,108(5):685-692
It has been experimentally demonstrated that the use of the effect of significant narrowing of the fluorescence spectrum from
a nanocell that contains a column of atomic Rb vapor with a thickness of L = 0.5λ (where λ = 794 nm is the wavelength of laser radiation, whose frequency is resonant with the atomic transition of
the D
1 line of Rb) and the application of narrowband diode lasers allow the spectral separation and investigation of changes in
probabilities of optical atomic transitions between levels of the hyperfine structure of the D
1 line of 87Rb and 85Rb atoms in external magnetic fields of 10–2500 Gs (for example, for one of transitions, the probability increases ∼17 times).
Small column thicknesses (∼390 nm) allow the application of permanent magnets, which facilitates significantly the creation
of strong magnetic fields. Experimental results are in a good agreement with the theoretical values. The advantages of this
method over other existing methods are noted. The results obtained show that a magnetometer with a local spatial resolution
of ∼390 nm can be created based on a nanocell with the column thickness L = 0.5λ. This result is important for mapping strongly inhomogeneous magnetic fields. 相似文献
6.
A. D. Sargsyan G. T. Hakhumyan D. H. Sarkisyan 《Journal of Contemporary Physics (Armenian Academy of Sciences)》2012,47(2):64-72
We study experimentally and theoretically D
1 lines of 85Rb and 87Rb atoms and show that using atomic-velocity-selective optical resonances which are formed in the transmission spectrum of
an atomic rubidium-filled submicron cell at single pass of linearly polarized laser radiation, it is possible to measure weak
magnetic fields beginning with 5 G. Having in mind the results obtained earlier with use of also submicron cell with 87Rb (D
1 line) and circularly polarized laser radiation, the entire range of measurable magnetic fields (both homogeneous and inhomogeneous)
becomes 5–5000 G. 相似文献
7.
8.
STUDY OF FARADAY ANOMALOUS DISPERSION SPECTRA OF THE HYPERFINE STRUCTURE OF Rb D2 LINES 总被引:1,自引:0,他引:1
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Natural rubidium is a mixture of the two isotopes, 85Rb and 87Rb, the natural abundances of which are 72.2 and 27.8 percent, respectively. Taking into account their hyperfine structure, we have cal-culated the Faraday anomalous dispersion spectra (FADS)of Rb D2 lines in different magnetic fields and observed them experimentally. The theoretical calculations are in good agreement with the experi-mental results. In this paper, we also discuss the results. 相似文献
9.
10.
Excited atomic2 P 3/2-states of radioactive Rb isotopes have been investigated by level crossing and optical double resonance spectroscopy. The measured hyperfine structure constants yielded the nuclear moments $$\begin{gathered} \mu _I (^{84} Rb) = - 1.296(11)\mu _K Q(^{83} Rb) = + 0.27(5) \cdot 10^{ - 24} cm^2 \hfill \\ Q(^{84} Rb) = + 0.005(13) \cdot 10^{ - 24} cm^2 \hfill \\ Q(^{86} Rb) = + 0.20(3) \cdot 10^{ - 24} cm^2 \hfill \\ \end{gathered} $$ and the hyperfine anomaly84Δ85=+1.7(1.0) · 10?2. The quadrupole moments of83Rb to87Rb can be explained with the unified model of vibrations. 相似文献
11.
Douglas E. Thornton 《Optics Communications》2011,284(12):2890-2894
The saturation absorption technique is applied to the 87Rb 2S1/2 F″ = 2 → 2P3/2 F′ = 1, 2 and 3 transitions to study the effect of velocity changing collisions (VCC). The VCC caused Doppler pedestal increases with argon pressure from 0 to 110 mTorr and decreases with modulation frequencies of 700-3200 Hz. The resonances of the velocity selective, saturated optical pumping are washed out for pressure of 110 mTorr. The magnitude of the Doppler pedestal relative to the homogeneous features, yields a rate for velocity changing collisions of 6.5 ± 0.2 × 10−10 cm3 s−1. 相似文献
12.
Seo Ro Shin 《Optics Communications》2011,284(5):1243-1246
We present an experimental and theoretical study of the transmission of an arbitrarily polarized laser beam for a Doppler broadened rubidium vapor cell. As the polarization of the probe beam was varied from linear to circular, the transmission for the transitions Fg = 3 → Fe = 2, 3, 4 of the D2 line of 85Rb atoms was measured and compared with calculated results. In the calculation, the time-dependent absorption coefficient, calculated numerically from the density-matrix equation, was averaged over the velocity distribution and various transit time crossing the laser beam. The final transmission was obtained by considering the Gaussian profile of the laser beam. We found good agreement between experimental and calculated results. 相似文献
13.
Nonlinear resonant optical rotation was studied over a wide range of experimental parameters at the Rb D 1 F = 2→F′ = 1 transition in the 87Rb vapor under conditions of coherent population trapping. The angle of rotation was found to depend nonmonotonically on the laser intensity and applied magnetic field. The effect of optical pumping out to the level F = 1 is discussed. It is demonstrated experimentally that the Faraday rotation angle increases twofold upon the compensation for pumping. 相似文献
14.
Cross sections for the reaction 87Rb(d, p)88Rb induced by 4 to 6 MeV deuterons were measured to obtain spectroscopic data on levels in 88Rb. The Q-value for the reaction to the ground state of 88Rb was 3.837 ± 0.020 MeV. In addition twenty-three levels up to 3 MeV excitation in 88Rb were populated. Four different deuteron optical model parameter sets, which fit our 87Rb(d, d) elastic scattering data, were used in a DWBA analysis. Assignments of ln, were made to nine levels on the basis of angular distribution shapes and excitation functions. Relative spectroscopic factors were determined with a maximum deviation of only 15%. However absolute spectroscopic factors were extremely sensitive to the neutron radius parameter, and hence the normalization of the bound neutron wave functions. The structure of 88Rb is discussed. 相似文献
15.
The object of investigation is double radiooptic resonance in 87Rb atomic vapor contained in a cell covered by an antirelaxation coating. The Dicke narrowing is studied in terms of the quantum-kinetic
approach. It is found that optical pumping using a laser with a “wide” radiation spectrum makes it possible to improve the
short-term stability of the frequency standard by an order of magnitude compared with a narrow-spectrum laser. 相似文献
16.
G. A. Kazakov B. G. Matisov I. E. Mazets Yu. V. Rozhdestvensky 《Technical Physics》2006,51(11):1414-1424
The results of theoretical and numerical analysis of resonances of coherent population trapping in 87Rb atomic vapors, obtained using copropagated linearly polarized waves, are presented. Various schemes for exciting dark resonance are compared with a view to obtaining a new-generation small-size quantum frequency standard. 相似文献
17.
V.B. Tiwari S. Singh S.R. Mishra H.S. Rawat S.C. Mehendale 《Optics Communications》2006,263(2):249-255
18.
Luís E.E. de Araujo Silvânia A. Carvalho A.A. Soares Daniel Pereira 《Optics Communications》2008,281(4):626-632
We performed two-color spectroscopy of the (4s2) 1S0 → (4s4p) 1P1 → (4p2) 1D2 calcium atomic transition and observed velocity-selective optical pumping in a calcium hollow cathode lamp by means of optogalvanic detection. The optical pumping signature in optogalvanic detection is compared to that of fluorescence and transmission detections. The optogalvanic technique is found to be a very sensitive method of detecting optical pumping and could be used in distinguishing optical pumping from electromagnetically induced transparency. 相似文献
19.
Electromagnetically induced transparency (EIT) resonance in strong magnetic fields of up to 1.7 kG has been investigated with the use of a 30-??m cell filled with an atomic rubidium vapor and neon as a buffer gas. The EIT resonance in the ?? system of the D1 line of 85Rb atoms has been formed with the use of two narrowband (??1 MHz) 795-nm diode lasers. The EIT resonance in a longitudinal magnetic field is split into five components. It has been demonstrated that the frequencies of the five EIT components are either blue- or red-shifted with an increase in the magnetic field, depending on the frequency ??P of the probe laser. In has been shown that in both cases the 85Rb atoms enter the hyperfine Paschen-Back regime in magnetic fields of >1 kG. The hyperfine Paschen-Back regime is manifested by the frequency slopes of all five EIT components asymptotically approaching the same fixed value. The experiment agrees well with the theory. 相似文献
20.
Absolute optical frequency measurement of saturated absorption lines in Rb near 422 nm 总被引:1,自引:0,他引:1
A.D. Shiner A.A. Madej P. Dubé J.E. Bernard 《Applied physics. B, Lasers and optics》2007,89(4):595-601
We present absolute optical frequency measurements of the 5s2
S
1/2–6p2
P
1/2 hyperfine resolved transitions in both 85Rb and 87Rb near 422 nm. The frequency of each transition was measured by stabilizing a narrow-linewidth extended cavity diode laser
to the transition under study and by measuring that frequency with a femtosecond laser frequency comb. A frequency-doubled
844 nm laser was used as a frequency link to connect the 422 nm probe laser to the near infrared part of the comb. The resulting
uncertainties of <70 kHz in the Rb transition frequencies represent a four-order of magnitude improvement over previously
published results. The frequencies reported in this paper are one of the most accurate series of measurements made in the
violet region of the spectrum.
PACS 06.30.Ft; 33.20.Kf; 43.62.Fi 相似文献