Details

Autor(en) / Beteiligte

• Zhang, X.M.
• Liang, C.
• Liu, G.
• Fan, D.Y.
• Lang, Peilin
• Sun, Z.B.
• Ma, H.Q.
• Zhang, R.
• Lei, M.

Titel

Analysis of a InGaAs/InP single photon detector at 1550 nm

Ist Teil von

• Journal of modern optics, 2013-07, Vol.60 (12), p.983-986

Ort / Verlag

Abingdon: Routledge

Erscheinungsjahr

2013

Quelle

Taylor & Francis Journals Auto-Holdings Collection

Beschreibungen/Notizen

• A new type of single-photon detector is introduced and its related properties characterized. The single-photon detector operating in the Geiger mode uses a new type of cooling system to moderate temperature, which can make the temperature drop to −65 °C. Besides, the single-photon detector adopts a hold-off time modulation feedback control circuit to decrease the afterpulsing effects and the gate pulse is coupled to the avalanche diode through capacitance. In addition, a suitable delay and comparator with latch function circuit are used to detect avalanche signals. Experimental conditions are that the clock frequency is 10 MHz, refrigeration temperature is −65 °C, and the width of control pulse is 5 ns. The experimental results indicate that quantum efficiency is about 20.42% and the dark count rate is about 5 × 10 −6 ns −1 with signal-to-noise ratio 27 dB at the optimum operation point of this detector. The designed single-photon detector achieves a tradeoff between lower dark count rates and high quantum efficiency.