Nazmus Shaker Nafi

Design of an Avalance Photo Diode: A single photon detector for QKD

A performance analysis of different photo diodes for QKD application in the Optical commutation links

• Broschiertes Buch

Produktbeschreibung

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 1.55 m. 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 10-12A with an overall signal to noise ratio better than 18dB. The device sensitivity is better than -40dBm, which is more than an order of magnitude higher than the dark current, corresponding to a detection sensitivity of two photonsin pico-second pulses.

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Produktdetails

• Verlag: LAP Lambert Academic Publishing
• Aufl.
• Seitenzahl: 56
• Erscheinungstermin: 10. Oktober 2011
• Englisch
• Abmessung: 220mm x 150mm x 4mm
• Gewicht: 96g
• ISBN-13: 9783846527085
• ISBN-10: 3846527084
• Artikelnr.: 34219078

Autorenporträt

Mr. Nazmus Shaker Nafi(B.Eng. in Communication,IIUM 2010) was born in Bangladesh. Right now, working on WiMAX Tech. as a research scholar in the University of Newcastle Australia. Has addiction to explore latest technologies. Active in travelling and watching latest movies. Loves his parents and his only sister more than anything in this world.