Fully integrated InGaAs/InP single-photon detector module with gigahertz sine wave gating

Date: 2012-08-21
Authors X. L. Liang, J. H. Liu, Q. Wang, D. B. Du, J. Ma, G. Jin, Z. B. Chen, J. Zhang *, and J. W. Pan
Journal No. Rev. Sci. Instrum. 83, 083111 (2012)
Abstract InGaAs/InP single-photon avalanche diodes(SPADs) working in the regime of GHz clock rates are crucial components for the high-speed quantum key distribution(QKD). We have developed for the first time a compact, stable, and user-friendly tabletop InGaAs/InP single-photon detector system operating at a 1.25 GHz gate rate that fully integrates functions for controlling and optimizing SPAD performance. We characterize the key parameters of the detector system and test the long-term stability of the system for continuous operation of 75 h. The detector system can substantially enhance QKD performance and our present work paves the way for practical high-speed QKD applications.