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- W3107784433 abstract "We report on a BB84 decoy-state quantum key distribution (QKD) system constructed using commercial off-the-shelf (COTS) components. Four 794 nm vertical-cavity surface-emitting lasers (VCSELs) are current-modulated at 10 MHz rate with three power levels to form a decoy state transmitter. The COTS VCSELs exhibit long term stability with high polarization extinction ratio, narrow band operation (sub-nanometer bandwidth), and wavelength tunability and stability suitable for constructing four indistinguishable qubit channels. A 780 nm, 10 MHz time-transfer channel is used for transferring the timing information along with a start and end marker for the qubit transfer period. Internally-developed transmitter laser drivers and receiver detectors are controlled and read out with COTS system-on-chip (SoC) boards. We obtain a nominal bit-error-rate (BER) of ~4% for the system. We also report on the development of a synchronous (100 MHz) single photon detector for increasing the repetition rate of our QKD system. This work shows promise for building a COTS-based, small size, weight, and power hardware for space applications." @default.
- W3107784433 created "2020-12-07" @default.
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- W3107784433 date "2020-10-01" @default.
- W3107784433 modified "2023-09-23" @default.
- W3107784433 title "Decoy-state quantum key distribution with direct modulated commercial off-the-shelf VCSEL lasers" @default.
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- W3107784433 doi "https://doi.org/10.1109/qce49297.2020.00034" @default.
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