Frequency measurements on optically narrowed Rb-stabilised laser diodes at 780 nm and 795 nm

Barwood, G P; Gill, P.; Rowley, W. R. C.

doi:10.1007/bf00330229

Cited by 159 publications

(116 citation statements)

References 17 publications

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“…30 In order to evaluate the sources of limitations to the frequency stability measured at medium-term integration times around Ϸ 10 4 s and beyond, the influence of several experimental parameters on the frequency position of the saturated absorption reference lines was evaluated for the simple spectroscopic setup used in the laser head. 25,28 Table II lists the measured sensitivity of the Doppler-free resonance frequencies to variations of selected parameters, which are in good agreement with the values reported in previous studies 29,30 for more elaborated setups. Table II also gives the resulting frequency drifts of the stabilized laser, calculated from typical parameter variations over =10 4 s encountered in our experiments.…”

Section: B Frequency Stabilitysupporting

confidence: 88%

“…28 When, for example, the laser is stabilized to the crossover 21-23 line, its frequency is thus shifted by about 0.5 MHz with respect to the line's true frequency position. Such frequency shifts can be suppressed when using a 3f demodulation scheme 29,30 and were not studied in detail here. Similarly, the inevitable amplitude modulation ͑AM͒ of the light field arising from the current modulation can vary in time and thus might cause some drifts of the laser frequency bias from the exact resonance frequency.…”

Section: B Frequency Stabilitymentioning

confidence: 99%

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A compact laser head with high-frequency stability for Rb atomic clocks and optical instrumentation

Affolderbach

Mileti

2005

Review of Scientific Instruments

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We present a compact and frequency-stabilized laser head based on an extended-cavity diode laser. The laser head occupies a volume of 200 cm 3 and includes frequency stabilization to Doppler-free saturated absorption resonances on the hyperfine components of the 87 Rb D 2 lines at 780 nm, obtained from a simple and compact spectroscopic setup using a 2 cm 3 vapor cell. The measured frequency stability is ഛ2 ϫ 10 −12 over integration times from 1 s to 1 day and shows the potential to reach 2 ϫ 10 −13 over 10 2 −10 5 s. Compact laser sources with these performances are of great interest for applications in gas-cell atomic frequency standards, atomic magnetometers, interferometers and other instruments requiring stable and narrow-band optical sources.

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Section: B Frequency Stabilitysupporting

confidence: 88%

Section: B Frequency Stabilitymentioning

confidence: 99%

A compact laser head with high-frequency stability for Rb atomic clocks and optical instrumentation

Affolderbach

Mileti

2005

Review of Scientific Instruments

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“…The value for (E F =2 − E F =1 )/2πh agrees well with the measured value 816.66(3) MHz from Ref. [27]. This seems to create serious doubt in the measured value 812.29(3) MHz from Ref.…”

supporting

confidence: 85%

Breakdown of atomic hyperfine coupling in a deep optical-dipole trap

et al. 2015

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We experimentally study the breakdown of hyperfine coupling for an atom in a deep optical-dipole trap. One-color laser spectroscopy is performed at the resonance lines of a single 87 Rb atom for a trap wavelength of 1064 nm. Evidence of hyperfine breakdown comes from three observations, namely, a nonlinear dependence of the transition frequencies on the trap intensity, a splitting of lines which are degenerate for small intensities, and the ability to drive transitions which would be forbidden by selection rules in the absence of hyperfine breakdown. From the data, we infer the hyperfine interval of the 5P 1/2 state and the scalar and tensor polarizabilities for the 5P 3/2 state.PACS numbers: 42.50. Hz, 32.60.+i, 32.10.Dk, 37.30.+i Optical dipole traps (ODTs), including optical lattices, are established tools for trapping cold atoms. They rely on a position-dependent light shift of the atomic ground state. Excited states usually change differently so that transition lines are shifted. The line shifts can be small, like in shallow traps, or even vanish, like in magic-wavelength traps [1,2]. However, magic wavelengths cannot always be employed because either the spontaneous emission rate would be too high, or highpower lasers are not available, or more than two atomic levels are used, making it impossible to find a wavelength that is simultaneously magic for all transitions. Nevertheless, the increasing demand for improved control of atoms makes it desirable to work in deep ODTs. The advantages of deep ODTs include precise localization of the trapped atoms, the possibility to perform resolvedsideband Raman cooling, and reduced atom loss in the presence of heating processes.Driving resonant transitions in deep ODTs requires precise knowledge of the atomic light shifts. For optical transitions, the excited-state light shifts are nontrivial and, interestingly, investigations on this subject are only at a beginning, although deep ODTs have long been employed in the fields of atomic clocks, quantum information processing (QIP), and quantum many-body physics. Examples include single-atom optical tweezers [3][4][5][6][7], atoms inside high-finesse cavities [8], atoms trapped close to nanophotonic waveguides [9] or resonators [10], atoms in hollow optical fibers [11], and quantum gas microscopes [12,13]. Line shifts might also become relevant in future experiments with ions in ODTs [14,15] and molecules in ODTs [16,17].Here we show that the differential light shifts depend nonlinearly on intensity for high intensities, in contrast to the well-known linear dependence for low intensities. The typical ODT depth, for which the nonlinear effect becomes comparable to the natural atomic linewidth is remarkably small, namely, k B × 0.4 mK for the parameters of our experiment, where k B is the Boltzmann constant. Moreover, we observe a splitting of resonances which * stephan.ritter@mpq.mpg.de would be degenerate in the linear regime and we observe a resonance which would be dipole forbidden in the linear regime. The data are ob...

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“…6 Our use of a Rbstabilized diode laser as the reference has the primary advantage that there are several known hyperfine transitions that can be used for locking the laser. This enables us to check systematic errors using different reference frequencies.…”

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confidence: 99%

Precise frequency measurements of atomic transitions by use of a Rb-stabilized resonator

2003

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We demonstrate a technique for frequency measurements of atomic transitions with a precision of 30 kHz. The frequency is measured using a ring-cavity resonator whose length is calibrated against a reference laser locked to the D 2 line of 87 Rb, the frequency of which is known to 10 kHz. We have used this to measure the hyperfine structure in the 5P 3/2 state of 85 Rb. We obtain precise values for the hyperfine constants A = 25.041(6) MHz and B = 26.013 (25) MHz, and a value of 77.992(20) MHz for the isotope shift in the D 2 line.

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Frequency measurements on optically narrowed Rb-stabilised laser diodes at 780 nm and 795 nm

Cited by 159 publications

References 17 publications

A compact laser head with high-frequency stability for Rb atomic clocks and optical instrumentation

A compact laser head with high-frequency stability for Rb atomic clocks and optical instrumentation

Breakdown of atomic hyperfine coupling in a deep optical-dipole trap

Precise frequency measurements of atomic transitions by use of a Rb-stabilized resonator

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