Towards Quantum Key Distribution System using Homodyne Detection with Differential Time-Multiplexed Reference

Auto-compensating Quantum Cryptosystem using Homodyne Detection

“…We now compare the performance of the BHD receiver with the typical SPDM schemes that use cooled Geigermode avalanche photodiodes [8]. For example, when N s = 0.5 and X = 1, the post-detection efficiency is ρ = 0.5 with BER P < 1% with no constraints on the operational frequency.…”

Homodyne detection of weak coherent optical pulse: Applications to quantum cryptography

“…In search of a high-speed and high-performance QKD system, balanced homodyne detection (BHD) using PIN photodiodes is an ideal alternative to the SPADs for the detection of quantum level signals that consist of weak coherent pluses (WCP), since it allows unity quantum efficiency and potential GHz operation rate [2,3]. Facilitated by a strong local oscillator (LO) whose noise has only negligible influence compared with the signal quantum noise [4,5], BHD technique can overcome the nondesirable effects such as after-pulses and dark counts characteristics of SPAD.…”

“…During the last few years, interest in internal antennas, such as Microstrip Patch antenna (MSA), has rapidly increased in mobile communication systems due to its attractive features as follows: small size and compact, low specific absorption rate (SAR), low cost, and easily integrated into planar circuit [1][2][3][4][5].…”

Security Evaluation of Dual-threshold Homodyne Quantum Cryptographic Systems

“…The presence of an eavesdropper introduces errors in the system and the overall security is measured as the differential mutual information. In this work we analyze a homodyne QKD system exhibiting a controllable decision threshold [5] and estimate the security level under several types of attack.…”