| Original Articles |
|
|
|
|
Balanced Single-Photon Detectors Using InGaAs/InP Avalanche Photodiodes with Transformer-Based Spike Cancellation |
| WU Guang;ZHOU Chun-Yuan;LI He-Xiang;ZENG He-Ping |
| Key Laboratory of Optical and Magnetic Resonance Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062 |
|
| Cite this article: |
|
WU Guang, ZHOU Chun-Yuan, LI He-Xiang et al 2005 Chin. Phys. Lett. 22 525-528 |
|
|
|
|
Abstract We demonstrate balanced single-photon detectors at 1550nm with InGaAs/InP avalanche photodiodes by using transformer-based spike cancellation. The spike cancellation makes it possible to shorten the gate pulse width and to decrease the threshold of the discriminator. With a 4-ns gate, we obtain a dark-count probability of 8.5×10-5 per pulse at the detection efficiency of 10%. An after-pulse probability of 8.9×10-5 is obtained after 1-μs interval. Owing to its low after-pulse probability, the ratio of the dark count probability to the detection efficiency per pulse is about 7.5×10-5 while the repetition frequency ranges from 100 to 800kHz.
|
| Keywords:
03.67.Dd
42.50.Dv
|
|
|
Published: 01 March 2005
|
|
| PACS: |
03.67.Dd
|
(Quantum cryptography and communication security)
|
| |
42.50.Dv
|
(Quantum state engineering and measurements)
|
|
|
|
|
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
