An all-optical phase detector by amplitude modulation of the local field in a Rydberg atom-based mixer

Liu, Xiubin; Jia, Feng-Dong; Zhang, Huaiyu; Mei, Jun; Liang, Wei-Chen; fei, zhou; Yu, Yonghong; Liu, Ya; Zhang, Jian; Xie, Feng; Zhong, Zhimei

doi:10.1088/1674-1056/ac6dbb

Cited by 8 publications

(3 citation statements)

References 29 publications

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“…This quality makes them ideal quantum sensors for precise MW measurements. In recent years, Rydberg atom-based microwave electric field sensors have witnessed rapid development in various fields, including extreme weak field measurement, [23,24] power frequency measurement, [25] phase measurement, [26] polarization measurement, [18] and more. Through Rydberg electromagnetically-induced transparency (EIT), the introduction of MW induces the splitting of Rydberg atomic energy levels, leading to Autler-Townes (AT) splitting in EIT.…”

Section: Introductionmentioning

confidence: 99%

Microwave electrometry with Rydberg atoms in a vapor cell using microwave amplitude modulation

Hao 郝,

Jia 贾,

Cui 崔

et al. 2024

Chinese Phys. B

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We have theoretically and experimentally studied the dispersive signal of the Rydberg atomic electromagnetically induced transparency (EIT) - Autler-Townes (AT) splitting spectra obtained using amplitude modulation of the microwave (MW) electric field. In addition to the two zero-crossing points interval $\Delta f_{\text{zeros}}$, the dispersion signal has two positive maxima with an interval defined as the shoulder interval $\Delta f_{\text{sho}}$, which is theoretically expected to be used to measure a much weaker MW electric field. The relationship of MW field strength $E_{\text{MW}}$ and $\Delta f_{\text{sho}}$ are experimentally studied at the MW frequencies of 31.6 GHz and 9.2 GHz respectively. The results show that $\Delta f_{\text{sho}}$ can be used to character the much weaker $E_{\text{MW}}$ than that of $\Delta f_{\text{zeros}}$ and the traditional EIT-AT splitting interval $\Delta f_{\text{m}}$, the minimum $E_{\text{MW}}$ measured by $\Delta f_{\text{sho}}$ is about 30 times smaller than that by $\Delta f_{\text{m}}$. As an example, the minimum $E_{\text{MW}}$ at 9.2 GHz that can be characterized by $\Delta f_{\text{sho}}$ is 0.056 mV/cm, which is the minimum value characterized by frequency interval using vapour cell without adding any auxiliary fields. The proposed method can improve the weak limit and sensitivity of $E_{\text{MW}}$ measured by spectral frequency interval, which is important in the direct measurement of weak $E_{\text{MW}}$.

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Section: Introductionmentioning

confidence: 99%

Microwave electrometry with Rydberg atoms in a vapor cell using microwave amplitude modulation

Hao 郝,

Jia 贾,

Cui 崔

et al. 2024

Chinese Phys. B

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“…For example, microwave (MW) communication based on Rydberg atoms has the advantages of long transfer distance, large data transfer capacity, and high transfer quality. Therefore, electromagnetic-induced transparency (EIT) scheme based on Rydberg atoms arouses great interest in amplitude modulation, [8,9] phase shift key, [10,11] frequency modulation, [12,13] phase modulation, [14,15] MW electric-field measurement, [16][17][18][19][20][21][22] etc. Also, we notice that some other researches of Rydberg atoms, such as Rydberg blockade effect, [23,24] Rydberg-atom array, [25,26] and Rydberg spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Optical PAM-4/PAM-8 generation via dual-Raman process in Rydberg atoms

Song 宋,

Yin 尹,

Ren 任

et al. 2024

Chinese Phys. B

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A scheme of optical four-level pulse amplitude modulation (PAM-4) is proposed based on dual-Raman process in Rydberg atoms. A probe field counter-propagates with a dual-Raman field which drive the ground and the excited states transition, respectively, and the Rydberg transition is driven by a microwave (MW) field. A gain peak appears in the probe transmission and is sensitive to the MW field strength. Optical PAM-4 could be achieved by encoding a MW signal and decoding the magnitude of a probe signal. Simulation results show that the differential nonlinearity and the integral nonlinearity of the proposed scheme could be reduced by 5 times and 6 times, respectively, compared with the previous scheme, and the ratio of level separation mismatch is close to the ideal value 1. Moreover, the scheme is extended to optical PAM-8 signal, which may further improve the spectral efficiency.

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“…[4][5][6] Recently, Rydberg atom-based microwave electrometry has attracted extensive attention due to its extraordinary reproducibility, accuracy and stability. [7][8][9][10][11][12][13][14][15][16][17][18][19][20] Thus, the approach of utilizing the electromagnetically induced transparency (EIT) and Autler-Townes (AT) splitting has the potential for a new international standard for electric-field measurements and calibrations. On the other hand, when a radio-frequency (rf) field is applied to the system, the Rydberg levels experience ac Stark shifts.…”

Section: Introductionmentioning

confidence: 99%

Atom-based power-frequency electric field measurement using the radio-frequency-modulated Rydberg spectroscopy

2023

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The radio-frequency modulated electromagnetically induced transparency (EIT) in a ladder three-level system with Rydberg state is studied. Under the influence of a fast radio-frequency field, the EIT peak splits into a series of sidebands. When attaching a power-frequency electric field directly to the fast radio-frequency field, the odd-order sidebands of the Rydberg-EIT oscillate sensitively with the power-frequency field. The oscillation frequency is equal to twice the power frequency; the oscillation amplitude is monotonically increasing with the amplitude of the power-frequency field when the change of Stark-shift is smaller than the radio frequency. Our work paves the way for the measurement of the power-frequency electric field based on Rydberg atoms.

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An all-optical phase detector by amplitude modulation of the local field in a Rydberg atom-based mixer

Cited by 8 publications

References 29 publications

Microwave electrometry with Rydberg atoms in a vapor cell using microwave amplitude modulation

Microwave electrometry with Rydberg atoms in a vapor cell using microwave amplitude modulation

Optical PAM-4/PAM-8 generation via dual-Raman process in Rydberg atoms

Atom-based power-frequency electric field measurement using the radio-frequency-modulated Rydberg spectroscopy

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