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首页> 外文期刊>Superconductor Science & Technology >Fiber-coupled superconducting nanowire single-photon detectors integrated with a bandpass filter on the fiber end-face
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Fiber-coupled superconducting nanowire single-photon detectors integrated with a bandpass filter on the fiber end-face

机译：光纤耦合超导纳米线单光子探测器，光纤端面上的带通滤波器集成

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摘要

Superconducting nanowire single-photon detectors (SNSPDs) with both high system detection efficiency (SDE) and low dark count rate (DCR) play significant roles in quantum information processes and various applications. The background dark counts of SNSPDs originate from the room temperature blackbody radiation coupled to the device via a fiber. Therefore, a bandpass filter (BPF) operated at low temperature with minimal insert loss is necessary to suppress the background DCR. Herein, a low-loss BPF integrated on a single-mode fiber end-face was designed, fabricated and verified for the low temperature implement. The fiber end-face BPF was featured with a typical passband width about 40 nm in the 1550 nm telecom band and a peak transmittance of over 0.98. SNSPD with high SDE fabricated on a distributed Bragg reflector was coupled to the BPF. The device with such a BPF showed an SDE of 80% at a DCR of 0.5 Hz, measured at 2.1 K. Compared the same device without a BPF, the DCR was reduced by over 13 dB with an SDE decrease of 3%.
机译：超导纳米线单光子检测器（SNSPDS）具有高系统检测效率（SDE）和低暗计数率（DCR）在量子信息过程和各种应用中起着重要的作用。 SNSPD的背景暗计数来自通过纤维耦合到装置的室温黑体辐射。因此，在低温下操作的带通滤波器（BPF）对于抑制背景DCR是必要的。这里，设计，制造和验证集成在单模光纤端面上的低损耗BPF以进行低温工具。光纤端面BPF在1550nm电信带中具有约40nm的典型通带宽，峰值透射率超过0.98。具有高SDE的SNSPD，在分布式布拉格反射器上制造的高SDE耦合到BPF。具有这种BPF的装置在0.5Hz的DCR下​​显示出80％的SDE，在2.1k中测量。与没有BPF的相同装置比较，DCR减少了超过13dB的SDE＆LT; 3％。

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    Zhang W. J.; Yang X. Y.; Li H.; You L. X.; Lv C. L.; Zhang L.; Zhang C. J.; Liu X. Y.; Wang Z.; Xie X. M.;

  • 作者单位

    Chinese Acad Sci SIMIT State Key Lab Funct Mat Informat 865 Changning Rd Shanghai 200050 Peoples R China;

    Chinese Acad Sci SIMIT State Key Lab Funct Mat Informat 865 Changning Rd Shanghai 200050 Peoples R China;

    Chinese Acad Sci SIMIT State Key Lab Funct Mat Informat 865 Changning Rd Shanghai 200050 Peoples R China;

    Chinese Acad Sci SIMIT State Key Lab Funct Mat Informat 865 Changning Rd Shanghai 200050 Peoples R China;

    Chinese Acad Sci SIMIT State Key Lab Funct Mat Informat 865 Changning Rd Shanghai 200050 Peoples R China;

    Chinese Acad Sci SIMIT State Key Lab Funct Mat Informat 865 Changning Rd Shanghai 200050 Peoples R China;

    Chinese Acad Sci SIMIT State Key Lab Funct Mat Informat 865 Changning Rd Shanghai 200050 Peoples R China;

    Chinese Acad Sci SIMIT State Key Lab Funct Mat Informat 865 Changning Rd Shanghai 200050 Peoples R China;

    Chinese Acad Sci SIMIT State Key Lab Funct Mat Informat 865 Changning Rd Shanghai 200050 Peoples R China;

    Chinese Acad Sci SIMIT State Key Lab Funct Mat Informat 865 Changning Rd Shanghai 200050 Peoples R China;

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  • 正文语种 eng
  • 中图分类 超导电性;导电材料及其制品;
  • 关键词

    superconducting detectors; detection efficiency; dark count rate; bandpass filter; quantum information process;

    机译：超导探测器;检测效率;暗计数率;带通滤波器;量子信息过程;

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