Modulation transfer spectroscopy for D1 transition line of rubidium

Wu, Bin; Zhou, Yin; Weng, Kanxing; Zhu, Dong; Fu, Zhijie; Cheng, Bing; Wang, Xiaolong; Lin, Qiang

doi:10.1364/josab.35.002705

Cited by 19 publications

(7 citation statements)

References 26 publications

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“…This leads to the existence of ground-state crossover resonances in pump-probe spectroscopy schemes. These crossovers are something that are notably absent in the D line spectra of rubidium and caesium [8,40]. Similar ground-state crossover resonances have been previously observed in the D 2 transition of lithium [23].…”

Section: Introductionsupporting

confidence: 81%

Modulation transfer spectroscopy of the D1 transition of potassium: theory and experiment

Innes,

Majumder,

Noh

et al. 2024

J. Phys. B: At. Mol. Opt. Phys.

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We report on a study of modulation transfer spectroscopy of the 4S1/2 → 4P1/2 (D1) transitionof naturally abundant potassium in a room-temperature vapour cell. This transition is critical forlaser cooling and optical pumping of potassium and our study is therefore motivated by the need forrobust laser frequency stabilisation. Despite the absence of a closed transition, the small ground-state hyperfine splitting in potassium results in strong crossover features in the D1 modulationtransfer spectrum. To emphasise this we compare the D1 and D2 spectra of potassium with thoseof rubidium. Further, we compare our experimental results with a detailed theoretical simulation,examining different pump-probe polarization configurations to identify the optimal signals for laserfrequency stabilisation. We find good agreement between the experiment and the theory, especiallyfor the lin ∥ lin polarization configuration.

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Section: Introductionsupporting

confidence: 81%

Modulation transfer spectroscopy of the D1 transition of potassium: theory and experiment

Innes,

Majumder,

Noh

et al. 2024

J. Phys. B: At. Mol. Opt. Phys.

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“…The rf discharge cell was used for the population of the 6 3 P 2 -state since an electro-optical modulator with a suitable range of modulation frequencies of 14.4 MHz to 22.2 MHz was already available in the laboratory. We used a standard MTS setup [40,42] with a modulation depth of β ≈ 0.9 mostly limited by the rf amplifier used to drive the EOM. The signal component at the modulation frequency of the probe beam signal from a fast, low-noise photodiode is extracted by a bias-tee, amplified and demodulated with a STEMLab 125-14.…”

Section: Comparison Of Mercury Bulb and Rf Discharge Cellmentioning

confidence: 99%

On identifying critical parameters in an amplification without inversion setup in mercury ^*

Preißler

Eizenhöfer

Gumm

et al. 2022

J. Phys. B: At. Mol. Opt. Phys.

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Lasing without inversion is a compelling method based on the generation of coherences between atomic levels in order to produce UV radiation. While the proof-of-principle of this scheme has been shown for several decades, so far no radiation at a significant shorter wavelength than the necessary drive fields has been observed. In a recent publication Rein et al. (Phys Rev. A 105 (2022) 023722) have made experimental progress towards this goal. In this paper, we investigate the necessary improvements to their setup and discuss the experimental steps taken to achieve those goals. Specifically, we report on the improvement with respect to the laser sources.

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“…T. Preuschoff et al [31] proposed an analytical approach for determining the best modulation parameters of the MTS scheme. B. Wu et al [32] analyzed the dependency of the MTS signal on the temperature of the vapor cell and realized a spectrum with high SNR.…”

Section: Introductionmentioning

confidence: 99%

Research on the Frequency Stabilization System of an External Cavity Diode Laser Based on Rubidium Atomic Modulation Transfer Spectroscopy Technology

Wu,

Qin,

Ding

et al. 2024

Photonics

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To achieve high-frequency stability on the external cavity diode laser (ECDL), a 780 nm ECDL serves as the seed light source, and its frequency is precisely locked to the saturated absorption peak of rubidium (Rb) atoms using modulation transfer spectroscopy (MTS) technology. For improving the performance of frequency locking, the scheme is designed to find the optimal operating conditions. Correlations between the frequency discrimination signal (FDS) and critical parameters, such as the temperature of the Rb cell, the power ratio of the probe and pump light, and the frequency and amplitude of the modulation and demodulation signals, are observed to attain the optimal conditions for frequency locking. To evaluate the performance of the frequency-stabilized 780 nm ECDL, a dual-beam heterodyne setup was constructed. Through this arrangement, the laser linewidth, approximately 65.4 kHz, is measured. Then, the frequency stability of the laser, quantified as low as 4.886 × 10−12 @32 s, is determined by measuring the beat-frequency signal with a frequency counter and calculating the Allan variance. Furthermore, using the realized frequency locking technology, the 780 nm ECDL can achieve long-term stabilization even after 25 h. The test results show the exceptional performance of the implemented frequency stabilization system for the 780 nm ECDL.

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Modulation transfer spectroscopy for D1 transition line of rubidium

Cited by 19 publications

References 26 publications

Modulation transfer spectroscopy of the D1 transition of potassium: theory and experiment

Modulation transfer spectroscopy of the D1 transition of potassium: theory and experiment

On identifying critical parameters in an amplification without inversion setup in mercury ^*

Research on the Frequency Stabilization System of an External Cavity Diode Laser Based on Rubidium Atomic Modulation Transfer Spectroscopy Technology

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Modulation transfer spectroscopy for D1 transition line of rubidium

Cited by 19 publications

References 26 publications

Modulation transfer spectroscopy of the D1 transition of potassium: theory and experiment

Modulation transfer spectroscopy of the D1 transition of potassium: theory and experiment

On identifying critical parameters in an amplification without inversion setup in mercury *

Research on the Frequency Stabilization System of an External Cavity Diode Laser Based on Rubidium Atomic Modulation Transfer Spectroscopy Technology

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Product

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On identifying critical parameters in an amplification without inversion setup in mercury ^*