Design and characterization of single photon APD detector for QKD application

Al-Khateeb, Khalid A. Saeed and Nafi, Nazmus Shaker and Hassan, Khalid (2010) Design and characterization of single photon APD detector for QKD application. In: International Conference on Computer and Communication Engineering (ICCCE), 11-13 May 2010, Kuala Lumpur, Malaysia.

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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.

Item Type:	Conference or Workshop Item (Full Paper)
Additional Information:	3475/5644 (ISBN: 9781424462353)
Uncontrolled Keywords:	Avalanche Photo Diodes (APDs), Signal to Noise Ratio, Quantum Key Distribution (QKD), Gated Mode.
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101 Telecommunication. Including telegraphy, radio, radar, television T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800 Electronics. Computer engineering. Computer hardware. Photoelectronic devices > TK7885 Computer engineering
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Electrical and Computer Engineering
Depositing User:	Prof. Dr. Khalid A. S. Al-Khateeb
Date Deposited:	25 Oct 2011 11:11
Last Modified:	22 Dec 2011 10:32
URI:	http://irep.iium.edu.my/id/eprint/5644

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