A high-performance integrated single-photon detector for telecom wavelengths

Details A high-performance integrated single-photon detector for telecom wavelengths A high-performance integrated single-photon detector for telecom wavelengths

2003-11-17

arxiv.org/abs/quant-ph/0311112v1

Physics

Quantum Physics

(10 pages, 6 figures)

Scientific paper

We have integrated a commercial avalanche photodiode (APD) and the circuitry needed to operate it as a single-photon detector (SPD) onto a single PC-board. At temperatures accessible with Peltier coolers (~200-240K), the PCB-SPD achieves high detection efficiency (DE) at 1308 and 1545 nm with low dark count probability (e.g. ~10-6/bias pulse at DE=20%, 220 K), making it useful for quantum key distribution (QKD). The board generates fast bias pulses, cancels noise transients, amplifies the signals, and sends them to an on-board discriminator. A digital blanking circuit suppresses afterpulsing.

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