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Quantum analysis of a traveling-wave electro-optic phase modulator in the presence of the phase noise from a radio frequency oscillator and a laser
Published in OSA - The Optical Society
2020
Volume: 37
   
Issue: 10
Pages: 3016 - 3027
Abstract
Quantum analysis has been done for the traveling-wave (TW) electro-optic phase modulator in the presence of the phase noise of a radio frequency (RF) oscillator and a laser source, in which the Hamiltonian for an active section of the phase modulator system is derived. The effect of RF phase noise from the oscillator and a phase velocity mismatch (PVM) between optical photons and the RF field are included in the Hamiltonian. The time evolution of the field operator of the laser in the TW electro-optic phase modulator is derived by the Heisenberg equation of motion. The action of a TW electro-optic phase modulator in the presence of the two distinct weak noises- classical phase noise because of RF and quantum phase noise caused by a laser-has been evaluated and explained in terms of the second-order temporal correlation function and power spectrum. The power spectrum has been written as a function of the semiconductor laser linewidth, an enhancement factor in the laser linewidth, and theRF oscillator linewidth. The results are applied to analyze the basic model of a frequency-coded quantum key distribution (FC-QKD) system. The quantum bit error rate (QBER), the first-order optical intensity correlation function, and the spectrum of intensity fluctuation have been calculated for the partially coherent regime to evaluate the performance of theFC-QKDsystem. © 2020 Optical Society of America.
About the journal
JournalData powered by TypesetJournal of the Optical Society of America B: Optical Physics
PublisherData powered by TypesetOSA - The Optical Society
ISSN07403224
Impact Factor1.230
Open AccessNo
Citation Styleunsrt
Sherpa RoMEO Archiving PolicyGreen