DocumentCode :
1804450
Title :
Design and characterization of single photon APD detector for QKD application
Author :
Al-Khateeb, Khalid A S ; Nafi, Nazmus Shaker ; Hasan, Khalid
Author_Institution :
Dept. of Electr. & Comput. Eng., Int. Islamic Univ. Malaysia, Kuala Lumpur, Malaysia
fYear :
2010
fDate :
11-12 May 2010
Firstpage :
1
Lastpage :
5
Abstract :
Modeling and design of a single photon detector and its various characteristics are presented. It is a type of avalanche photo diode (APD) designed to suit the requirements of a Quantum Key Distribution (QKD) detection system. The device is modeled to operate in a gated mode at liquid nitrogen temperature for minimum noise and maximum gain. Different types of APDs are compared for best performance. The APD is part of an optical communication link, which is a private channel to transmit the key signal. The encrypted message is sent via a public channel. The optical link operates at a wavelength of 1.55μm. The design is based on InGaAs with a quantum efficiency of more than 75% and a multiplication factor of 1000. The calculated dark current is below 10-12 A with an overall signal to noise ratio better than 18 dB. The device sensitivity is better than -40 dBm, which is more than an order of magnitude higher than the dark current, corresponding to a detection sensitivity of two photons in pico-second pulses.
Keywords :
avalanche photodiodes; indium compounds; optical communication equipment; optical links; photodetectors; quantum cryptography; InGaAs; QKD application; avalanche photo diode; liquid nitrogen temperature; message encryption; optical communication link; quantum key distribution; single photon APD detector; Dark current; Detectors; Ionization; Photonics; Signal to noise ratio; Temperature; Avalanche Photo Diodes (APDs); Gated Mode; Quantum Key Distribution (QKD); Signal to Noise Ratio;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Computer and Communication Engineering (ICCCE), 2010 International Conference on
Conference_Location :
Kuala Lumpur
Print_ISBN :
978-1-4244-6233-9
Type :
conf
DOI :
10.1109/ICCCE.2010.5556839
Filename :
5556839
Link To Document :
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