We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Estimation of mean photon number based on single photon detection of weak coherent pulses.
- Authors
Ghanem, Hawraa A.; Tawfeeq, Shelan K.
- Abstract
The demand for single photon sources in quantum key distribution (QKD) systems has necessitated the use of weak coherent pulses (WCPs) characterized by a Poissonian distribution. Ensuring security against eavesdropping attacks requires keeping the mean photon number (µ) small and known to legitimate partners. However, accurately determining µ poses challenges due to discrepancies between theoretical calculations and practical implementation. This paper introduces two experiments. The first experiment involves theoretical calculations of µ using several filters to generate the WCPs. The second experiment utilizes a variable attenuator to generate the WCPs, and the value of µ was estimated from the photons detected by the BB84 detection setup. The second experiment represents an accurate method for estimating the value of µ because of using single photon detectors with high timing resolution and low dark counts, in addition to using a Time-to-digital convertor with a bin size of 81 ps.
- Subjects
PHOTON detectors; PHOTON counting; PHOTONS; EAVESDROPPING
- Publication
Iraqi Journal of Laser, 2024, Vol 23, Issue 1, p99
- ISSN
1812-1195
- Publication type
Article
- DOI
10.31900/ijl.v23i1.455