Compactly packaged superconducting nanowire single-photon detector with an optical cavity for multichannel system.
Compactly packaged superconducting nanowire single-photon detector with an optical cavity for multichannel system.
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DOI：
10.1364/oe.17.023557
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发表时间：
2009-12
期刊：
影响因子：
3.8
通讯作者：
S. Miki;M. Takeda;M. Fujiwara;M. Sasaki;Zhen Wang
中科院分区：
文献类型：
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作者：
S. Miki;M. Takeda;M. Fujiwara;M. Sasaki;Zhen Wang
我们研制了用于多通道系统的超导纳米线单光子探测器（OC-SNSPD）。为了有效的耦合，设备被安装在紧凑的光纤耦合封装后，其基板厚度从400微米减少到45微米。在不同衬底厚度下测量的检测效率（DE）测量和光学耦合效率的估计表明，大约98%的输入光束可以从衬底后面辐射到15 × 15微米2的纳米线区域上。在1550 nm和1310 nm处观察到NbN OC-SNSPD系统的DE分别为9.5%和25%（暗计数率：100 c/s）。
We developed superconducting nanowire single-photon detectors with an optical cavity (OC-SNSPDs) for multichannel systems. For efficient coupling, the devices were installed in compact fiber-coupled packages after their substrate thickness was reduced from 400 to 45 microm. The measured detection efficiency (DE) measurement at different substrate thicknesses and the estimation of optical coupling efficiency indicated that approximately 98% of the input light beam could be radiated on a 15 x 15 microm2 nanowire area from behind the substrate. The DEs of a NbN OC-SNSPD system were observed to be 9.5% and 25% at 1550 nm and 1310 nm, respectively (dark-count rate: 100 c/s).