首页|Generation of visible Raman operation laser by a fiber electro-optical modulator feedback loop

Generation of visible Raman operation laser by a fiber electro-optical modulator feedback loop

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Phase-coherent multi-tone lasers play a critical role in atomic,molecular,and optical physics.Among them,the Raman opeartion laser for manipulating atomic hyperfine qubits requires gigahertz bandwidth and low phase noise to retain long-term coherence.Raman operation lasers generated by directly modulated and frequency-multipled infrared lasers are compact and stable but lack feedback control to actively suppress the phase noise,which limits their performance in practical applications.In this work,we employ a fiber electro-optical modulator driven by a voltage-controlled oscillator[VCO]to modulate a monochromatic laser and employ a second-harmonic generation process to convert it to the visible domain,where the beat note of the Raman operation laser is stabilized by controlling the output frequency of VCO with a digital phase-locked loop[PLL].The low-frequency phase noise is effectively suppressed compared to the scheme without active feedback and it reaches-80 dBc/Hz@5 kHz with a 20 kHz loop bandwidth.Furthermore,this compact and robust scheme effectively reduces the system,s complexity and cost,which is promising for extensive application in atomic,molecular,and optical physics.

phase-coherent laserquantum informationtrapped ionstimulated Raman transitionphase-locked loop

李睿睿、叶蔚然、陈一龙、陈树谦、亓文昊、崔金明、黄运锋、李传锋、郭光灿

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CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China

CAS Center for Excellence in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China

Hefei National Laboratory,University of Science and Technology of China,Hefei 230088,China

国家重点研发计划国家自然科学基金国家自然科学基金国家自然科学基金中国科学院前沿科学重点研究计划Innovation Program for Quantum Science and TechnologyInnovation Program for Quantum Science and TechnologyUSTC Center for Micro and Nanoscale Research and Fabrication for technically supporting the fabrication of optical component

2017YFA0304100117743351173401512204455QYZDY-SSWSLH0032021ZD03016042021ZD0301200

2024

10.3788/COL202422.022702

中国光学快报(英文版)
中国光学学会 中国科学院上海光学精密机械研究所

中国光学快报(英文版)

CSTPCD
影响因子：1.305
ISSN：1671-7694
年,卷(期)：2024.22(2)
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