Subnanosecond single-photon timing with commercially available germanium photodiodes.
Subnanosecond single-photon timing with commercially available germanium photodiodes.
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DOI：
10.1364/ol.18.000075
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发表时间：
1993
期刊：
影响因子：
3.6
通讯作者：
A. Lacaita;S. Cova;F. Zappa;P. Francese
中科院分区：
文献类型：
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作者：
A. Lacaita;S. Cova;F. Zappa;P. Francese
我们证明，商用的锗雪崩光电二极管可以在 77 K 下实现单光子灵敏度和亚纳秒时间分辨率。实验表明，载流子捕获现象是探测器噪声的主要贡献者。因此，欢迎通过技术努力来克服目前由于材料质量造成的限制。这些设备适用于检测近红外范围内的短光脉冲，以及对短光纤进行光时域反射表征，分辨率为 1.3-1.5 微米。通过适当的器件设计可以进一步提高时序性能。
We demonstrate that commercially available germanium avalanche photodiodes can achieve single-photon sensitivity and subnanosecond time resolution at 77 K. Experiments show that carrier trapping phenomena give the main contribution to the detector noise. Therefore technological efforts will be welcome to overcome the present limitations that are due to the material quality. These devices are suitable for the detection of short optical pulses in the near-infrared range and in optical time-domain reflectometry characterization of short optical fibers with centimeter resolution at 1.3-1.5 microm. Futher improvements in the timing performance can be obtained by suitable device design.