A method of quantum communication using sideband-modulated infrared emission

Andrii Аleksieiev; Mikhailo Prokofiev; Petro Shpatar

doi:10.1117/12.3010050

5 January 2024 A method of quantum communication using sideband-modulated infrared emission

Andrii Аleksieiev, Mikhailo Prokofiev, Petro Shpatar

Author Affiliations +

Proceedings Volume 12938, Sixteenth International Conference on Correlation Optics; 129380T (2024) https://doi.org/10.1117/12.3010050
Event: International Conference Correlation Optics (COR 2023), 2023, Chernivtsi, Ukraine

Abstract

The method of quantum communication using sideband-modulated emission allows for efficient integration of devices constructed on this principle into optical fiber communication lines due to a number of advantages, including the absence of complex distributed interference schemes, simplification of the phase alignment task of the transmitter and receiver modules, and a significant increase in spectral efficiency of the use of the optical fiber communication line [1, 2]. The development of low-loss quantum communication methods using sideband frequencies, the efficiency of which does not depend on uncontrolled polarization change in the communication channel, and the development of methods for high-speed generation of quantum states are important theoretical and practical tasks. A semiconductor frequency-tunable laser with a central wavelength of 1550 nm, a bandwidth of 1.5 MHz, and a tuning step of 0.005 nm was used as the radiation source. The signal attenuation in the filter band is 43 dB, which allows to apply a modulation index of 0.05 with a contribution of the central wavelength to the quantum bit error rate of not more than 0.1%. The error rate when using the compensation scheme does not exceed 0.5%. The losses in the receiving module are 6.4 dB, which consist of losses of each modulator, on the polarization beam splitter, mixer, filter, and optical connectors.

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Andrii Аleksieiev, Mikhailo Prokofiev, and Petro Shpatar "A method of quantum communication using sideband-modulated infrared emission", Proc. SPIE 12938, Sixteenth International Conference on Correlation Optics, 129380T (5 January 2024); https://doi.org/10.1117/12.3010050

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