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NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2012, 3 (3), P. 92–98

MATHEMATICAL DESCRIPTION OF POLARIZATION DISTORTION OF SIGNAL IN QUANTUM CRYPTOGRAPHY SYSTEMS

Sergey Kynev – National Research University of Information Technologies, Mechanics, and Optics, St. Petersburg, Russia, student, skynev.ifmo@gmail.com.
Aliona Ivanova – National Research University of Information Technologies, Mechanics, and Optics, St. Petersburg, Russia, student, newiva@mail.ru.
Vladimir Egorov – National Research University of Information Technologies, Mechanics, and Optics, St. Petersburg, Russia, engineer, egorovvl@gmail.com.
Artur Gleim – National Research University of Information Technologies, Mechanics, and Optics, St. Petersburg, Russia, engineer, aglejm@yandex.ru.
Andrey Rupasov – “Concern “CSRI “Elektropribor” JSC, St. Petersburg, Russia, engineer, a.v.rupasov@gmail.com.
Sergey Chivilikhin – National Research University of Information Technologies, Mechanics, and Optics, St. Petersburg, Russia, associate professor, PhD, senior staff scientist, sergey.chivilikhin@gmail.com.

We discuss an analytical model that describes polarization distortion of an optical signal that appears during its propagation in a fiber optics line. The model is applied for illustrating the principles of weak signal distortion compensation in different types of quantum cryptography systems.

Keywords: quantum cryptography, birefringence, Faraday mirrors.

UDC 004.27:530.145

PACS 03.67.-a

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