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Single-atomic-ensemble dual-wavelength optical frequency standard

Photonics Research 2025年第3期13卷 721-727页

作者： JIE MIAO JINGMING CHEN DESHUI YU QIAOHUI YANG DUO PAN JINGBIAO CHEN State Key Laboratory of Advanced Optical Communication Systems and Networks Institute of Quantum ElectronicsSchool of ElectronicsPeking UniversityBeijing 100871China National Time Service Center Chinese Academy of SciencesXi’an 710600China Hefei National Laboratory Hefei 230088China

We demonstrate a dual-wavelength optical frequency standard based on the dual-optical-transition modulation transfer spectroscopy(DOT-MTS)between different quantum transitions of the rubidium D1(795 nm)and D2(780 nm)*** a single rubidium atomic ensemble,modulation frequency sidebands from the 780 nm pump beam are simultaneously transferred to both the 780 and 795 nm probe *** DOT-MTS enables the simultaneous stabilization of 780 and 795 nm lasers on a single vapor *** lasers exhibit a frequency instability in the low 10-14range at 1 s of averaging,as estimated from the residual error signal.A theoretical model is developed based on the V-type atomic level structure to illustrate the dual-wavelength *** approach can be extended to develop a multi-wavelength optical frequency standard within a single atomic ensemble,broadening its applicability in fields such as precision metrology,Rydberg atoms,wavelength standards,optical networks,and beyond.

关键词： vapor cellboth optical frequency standard modulation transfer spectroscopy rubidium atomic ensemblemodulation frequency sidebands rubidium atomic ensemble nm probe lasersthe nm lasers

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A structure based on fiber-optic gyroscopes for gravity measurement 2

A structure based on fiber-optic gyroscopes for gravity meas...

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advanced optical Manufacturing Technologies and Applications 2022, AOMTA 2022 and 2nd International Forum of Young Scientists on advanced optical Manufacturing, YSAOM 2022

作者： Chen, Yanjun Zhu, Lanxin Wang, Wenbo He, Yan Cao, Yuwen Huang, Huimin Ma, Xiangdong Li, Zhengbin State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Peking University Beijing100871 China School of Electronics Engineering & Computer Science Peking University Beijing100871 China

ISBN: (纸本)9781510661264

We propose a structure based on fiber-optic gyroscopes for gravity measurement in accordance with the tilt-coupling effect, where Sagnac effect can remove the coupling between translational and rotational motion in the tilt-coupling effect. A fiber-optic gyroscope with a sensitivity of 2 × 10−11 rad/s2/√Hz in sub-millihertz frequencies is reported, which can be utilized to measure the rotational motion in gravity measurement. The application of dual-polarization configuration improves the adaptability of exploration environment. © 2023 SPIE. All rights reserved.

关键词： Fiber optics

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Capillary-Based Structural Long-Period Gratings for High-Sensitivity Curvature and Strain Measurement 21

Capillary-Based Structural Long-Period Gratings for High-Sen...

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21st International Conference on optical Communications and networks, ICOCN 2023

作者： Ding, Mengjiao Tang, Mengxue Wang, Xin Hua, Ziyang Zhao, Yunhe Shanghai Maritime University Institute of Logistics Science and Engineering Shanghai201306 China Shanghai Jiao Tong University State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai200240 China

A structural long-period gratings built with cascaded-sections of capillaries for high-sensitive curvature and strain measurement is proposed and experimentally demonstrated, and the correspondent sensitivities of 29.... 详细信息

ISBN: (纸本)9798350343502

关键词： Strain measurement

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High-Order Vortex Smith-Purcell Radiation via Bragg Law in Multi-Period system 16

High-Order Vortex Smith-Purcell Radiation via Bragg Law in M...

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16th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies, UCMMT 2023

作者： Lei, Yu-Lu Du, Chao-Hai Zhang, Zi-Wen Zhu, Juan-Feng Peking University Center for Carbon-Based Electronics School of Electronics Beijing100871 China Peking University State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics China Singapore

ISBN: (纸本)9798350339406

Vortex beams propagate with inherent orbital angular momentum, which can be harnessed for terahertz manipulation, measurement, and communications. Nonetheless, achieving the high-purity generation of high-order topological charges poses a persistent challenge in terms of tunability and operation bandwidth. To overcome these limitations, this paper presents a theoretical and experimental demonstration of a methodology for generating high-order topological charges in emitted vortex Smith-Purcell radiation based on the Bragg law in multi-period systems. The proposed approach offers an alternative means to manipulate vortex free-electron radiation for multi-channel applications, enabling the chiral THz spectroscopy and emissions. © 2023 IEEE.

关键词： Vortex flow

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Linearity limit estimation for pre-distorted FMCW laser source

Linearity limit estimation for pre-distorted FMCW laser sour...

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OptoElectronics and Communications Conference, OECC

作者： Ruiyang Xu Chuxin Liu Yuyao Guo Liangjun Lu Jianping Chen Linjie Zhou State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai China

We propose a method that uses phase noise to estimate the frequency sweep linearity limit of the FMCW laser source. The experiment demonstrates that the measured linearity limit agrees well with the estimated linearit... 详细信息

ISBN: (数字)9798350308396

ISBN: (纸本)9798350308402

关键词： Phase noise Semiconductor device measurement Laser radar Semiconductor lasers Laser noise Linearity Measurement by laser beam Estimation Frequency estimation

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SAMA-IR: Comprehensive Input Refinement Methodology for optical networks with Field-Trial Validation

arXiv

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arXiv 2024年

作者： Zhang, Yihao Qiu, Qizhi Liu, Xiaomin Wu, Jiaping Yi, Lilin Hu, Weisheng Zhuge, Qunbi State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai China

We propose a novel input refinement methodology incorporating sensitivity analysis and memory-aware weighting for jointly refining numerous diverse inputs. Field trials show ~2.5 dB and ~2.3 dB improvements in Q-facto... 详细信息

关键词： Sensitivity analysis

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Modulation Voltage Swing Adaptive Microring Resonant Wavelength Locking Technique

Modulation Voltage Swing Adaptive Microring Resonant Wavelen...

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Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Han Wang Wenjia Zhang Yue Jiang Zuyuan He State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai China

ISBN: (数字)9798350379266

ISBN: (纸本)9798350379273

Addressing the wavelength locking application scenario for massive-scale micro-ring modulator arrays, this paper proposes a high-speed signal modulation voltage swing adaptive wavelength locking technique for microring modulators. Through simulations and experimental analysis, the effect of modulation voltage swing on the curve of average optical power versus input wavelength is analyzed, and the modulation voltage swing adaptive wavelength locking method based on STM32 is experimentally validated.

关键词： Analytical models Adaptation models optical interconnections Modulation Adaptive arrays optical modulation Voltage control Photonics High-speed optical techniques optical arrays

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A Novel Slim Dual-Band Monopole Antenna for Distribution Network Fault Diagnosis

A Novel Slim Dual-Band Monopole Antenna for Distribution Net...

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International Conference on Microwave and Millimeter Wave Technology Proceedings

作者： Xu Zhao Jie Ma Lianlin Li State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Peking University Beijing China

ISBN: (数字)9798350389968

ISBN: (纸本)9798350389975

A novel slim dual-band monopole antenna is presented in this paper. The proposed antenna consists of five metal strips, one monopole strip, two lower strips on both sides connected to the monopole strip, and two upper strips above the lower strips. All strips are printed on a FR4 substrate, which is perpendicular to the infinite PEC ground. Another FR4 substrate is placed between the strips and ground for isolating the current and potential capacitance matching structure. The simulated magnitude of ${{S}_{11}}$ of the proposed antenna reaches -20 dB on the expected frequencies 300 and 600 MHz. Benefited from its special frequency bands, robust structure and portability, the proposed antenna can be used for fault diagnosis of distribution network.

关键词： Microwave antennas Fault diagnosis Microwave technology Microwave integrated circuits Millimeter wave technology Dual band Distribution networks

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InteGrated Spatial Photonic Ising Sampler Based on High-Uniformity 1 × 8 Multi-Mode Interferometer

InteGrated Spatial Photonic Ising Sampler Based on High-Unif...

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Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Xin Ye Wenjia Zhang Zuyuan He State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai China

We propose an integrated spatial photonic Ising sampler using a high-uniformity multi-mode interferometer. It minimizes discrete and continuous spin Hamiltonians, achieves programmable spin couplings and external magn... 详细信息

ISBN: (数字)9798350379266

ISBN: (纸本)9798350379273

关键词： Couplings optical interferometry optical design Photonic integrated circuits optical computing optical fiber communication optical coupling Service-oriented architecture Magnetic fields Photonics

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laboratory Simulation of Electromagnetic Radiation Signals from Distribution Network Faults using USRP

Laboratory Simulation of Electromagnetic Radiation Signals f...

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International Conference on Microwave and Millimeter Wave Technology Proceedings

作者： Jie Ma Zhuo Wang Xu Zhao Lianlin Li State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Peking University Beijing China

ISBN: (数字)9798350389968

ISBN: (纸本)9798350389975

Distribution networks exhibit a significantly higher failure probability compared to transmission networks, thereby constituting the primary source of power system disruptions. The early detection and diagnosis of anomalies within these networks are paramount to ensure timely maintenance and to facilitate the swift restoration of power electronic systems. Monitoring the electromagnetic signals emitted by the distribution network enables the assessment of its operational state and facilitates the prognostication of potential faults. However, the sporadic nature of these faults presents a challenge in amassing data solely from real-world occurrences, underscoring the necessity of simulating fault signal generation within a controlled laboratory environment. This paper advocates for the utilization of Universal Software Radio Peripheral (USRP) technology to synthesize fault signals. It further corroborates the viability of this approach by juxtaposing the empirical outcomes with theoretical predictions.

关键词： Deep learning Partial discharges Simulation Prevention and mitigation Distribution networks Electromagnetic radiation Power electronics

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