On a beam splitter attack and soft filtering of coherent states in differential phase shift quantum cryptography

We investigate limitations imposed by sequential attacks on the performance of differential-phase-shift quantum key distribution protocols that use pulsed coherent light. In particular, we analyze two sequential attacks based on unambiguous state discrimination and minimum error discrimination, respectively, of the signal states emitted by the source. Sequential attacks represent a special type of intercept-resend attacks and, therefore, they provide ultimate upper bounds on the maximal distance achievable by quantum key distribution schemes.

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Dielectric multilayer beam splitter with differential phase shift on transmission and reflection for division-of-amplitude photopolarimeter

Optics Express ◽

10.1364/oe.22.011011 ◽

2014 ◽

Vol 22 (9) ◽

pp. 11011 ◽

Cited By ~ 3

Author(s):

Wenjia Yuan ◽

Weidong Shen ◽

Yueguang Zhang ◽

Xu Liu

Keyword(s):

Phase Shift ◽

Beam Splitter ◽

Differential Phase Shift ◽

Differential Phase ◽

Multilayer Beam ◽

Transmission And Reflection ◽

Dielectric Multilayer

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1310 nm differential-phase-shift QKD system using superconducting single-photon detectors

New Journal of Physics ◽

10.1088/1367-2630/11/4/045020 ◽

2009 ◽

Vol 11 (4) ◽

pp. 045020 ◽

Cited By ~ 12

Author(s):

Lijun Ma ◽

S Nam ◽

Hai Xu ◽

B Baek ◽

Tiejun Chang ◽

...

Keyword(s):

Phase Shift ◽

Single Photon ◽

Photon Detectors ◽

Differential Phase Shift ◽

Differential Phase ◽

Single Photon Detectors

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A geometric approach to higher-order differential phase shift keying

MILCOM 91 - Conference record ◽

10.1109/milcom.1991.258267 ◽

2002 ◽

Author(s):

D. van Alphen ◽

W.C. Lindsey

Keyword(s):

Phase Shift ◽

Geometric Approach ◽

Higher Order ◽

Phase Shift Keying ◽

Differential Phase Shift ◽

Differential Phase ◽

Differential Phase Shift Keying ◽

Shift Keying

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A fiber-based differential phase shift quantum key distribution scheme with higher key creation efficiency

Optics Communications ◽

10.1016/j.optcom.2009.03.066 ◽

2009 ◽

Vol 282 (14) ◽

pp. 3037-3039 ◽

Cited By ~ 4

Author(s):

Huani Zhang ◽

Jindong Wang ◽

Xiaobao Liu ◽

Zhengjun Wei ◽

Songhao Liu

Keyword(s):

Phase Shift ◽

Quantum Key Distribution ◽

Key Distribution ◽

Differential Phase Shift ◽

Differential Phase ◽

Distribution Scheme

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Design and Performance Analysis of 2D OCDMA System with Polarization States

Journal of Optical Communications ◽

10.1515/joc-2015-0094 ◽

2016 ◽

Vol 37 (4) ◽

Author(s):

Manisha Bharti ◽

Ajay K. Sharma ◽

Manoj Kumar

Keyword(s):

Phase Shift ◽

Polarization State ◽

Phase Shift Keying ◽

Modulation Formats ◽

Differential Phase Shift ◽

Differential Phase ◽

Differential Phase Shift Keying ◽

Shift Keying ◽

Polarization States ◽

Code Division Multiple

AbstractThis paper focuses on increasing the number of subscribers in optical code-division multiple access (OCDMA) system by using one of the features of light signal that it can be propagated in two polarization states. The performance of two-dimensional (2D) OCDMA system based on wavelength-time coding scheme by adding polarization state is investigated at varying data rates from 1 GHz to 6 GHz and for various modulation formats. It is reported that with increase in data rate of system, the performance of the system deteriorates due to polarization mode dispersion. Non-return to-zero (RZ), return to-zero (RZ), carrier suppressed return-to-zero (CSRZ) and differential phase shift keying (DPSK) modulation formats are simulated for a single user system with polarization. Investigations reveal that differential phase shift keying (DPSK) modulation format suits best to the proposed system and exhibit the potential to improve the flexibility of system for more number of users. The investigations are reported in terms of Q-factor, BER, received optical power (ROP) and eye diagrams.

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