1V脉冲驱动型交流量子电压源研究

doi:10.3969/j.issn.1000-1158.2020.12.14

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摘要脉冲驱动型交流量子电压标准ACJVS通过高速脉冲序列驱动约瑟夫森结阵芯片的方式实现宽频带交流量子电压的合成,相比于可编程型交流量子电压标准PJVS,具有免台阶切换、频谱纯净、频带宽等优点。搭建的系统主要包括8位高速脉冲码型发生器、微波放大器、直流阻断、约瑟夫森结阵芯片等。通过驱动包含4个子阵列,每个子阵列含12810个约瑟夫森结的结阵芯片,并结合4通道联合低频补偿的方式,成功产生了1V有效值的脉冲驱动型交流量子电压,为进一步建立交流量子电压基准打下了坚实的基础。最后,展望了脉冲驱动型交流量子电压在量子阻抗桥、交流量子功率源、交流量子功率表方面的应用价值。

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	周琨荔
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	鲁云峰
	施杨
	杨雁
	屈继峰

关键词 ：计量学, 交流量子电压源, 脉冲驱动, 阻抗桥, 交流量子功率

Abstract：The AC Josephson voltage standard synthesizes quantum voltages by driving Josephson junctions using a high-speed pulse pattern generator. In comparison with the Programmable Josephson Voltage Standard, its output waveform has no step transitions, clearer spectrum and wider bandwidth. The ACJVS contains a pulse pattern generator with eight bits, a microwave amplifier, DC blocks and a Josephson junction chip. A root-mean-square voltage of one volt was achieved by driving four sub-arrays with each containing 12810 Josephson junctions. In the system, each sub-array is compensated by a low frequency current source. In the end, three possible applications of the developed system including the quantum impedance bridge, quantum power source and quantum power meter were presented.

Key words： metrology AC quantum voltage source pulse driven impedance bridge AC quantum power

收稿日期: 2020-09-07 发布日期: 2020-12-08

PACS:

TB971

基金资助:中国科学院战略性先导科技专项(XDC07010100);国家重点研发计划(2018YFB2003402) ;国家自然科学基金青年基金项目(51907184);国家自然科学基金面上项目(61771441, 51877202)

通讯作者: 屈继峰(1978-),陕西西安人,中国计量科学研究院研究员,主要从事量子电压标准方面的研究。Email: qujf@nim.ac.cn E-mail: qujf@nim.ac.cn

作者简介: 周琨荔(1989-),重庆人,中国计量科学研究院副研究员,研究方向为交流量子电压标准。Email:zhoukl@nim.ac.cn

引用本文:

周琨荔,韩琪娜,赵建亭,鲁云峰,施杨,杨雁,屈继峰. 1V脉冲驱动型交流量子电压源研究[J]. 计量学报, 2020, 41(12): 1529-1535.
ZHOU Kun-li, HAN Qi-na, ZHAO Jian-ting, LU Yun-feng, SHI Yang, YANG Yan, QU Ji-feng. Pulse-driven AC Josephson Voltage Standard with an Output Voltage of One Volt. Acta Metrologica Sinica, 2020, 41(12): 1529-1535.

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http://jlxb.china-csm.org:81/Jwk_jlxb/CN/10.3969/j.issn.1000-1158.2020.12.14 或 http://jlxb.china-csm.org:81/Jwk_jlxb/CN/Y2020/V41/I12/1529

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