A wavelength tunable optical transmitter for quantum key distribution

Benjamin Griffiths; Yuen San Lo; James F. Dynes; Robert I. Woodward; Andrew J. Shields

doi:10.1117/12.2653116

8 March 2023 A wavelength tunable optical transmitter for quantum key distribution

Benjamin Griffiths, Yuen San Lo, James F. Dynes, Robert I. Woodward, Andrew J. Shields

Proceedings Volume 12446, Quantum Computing, Communication, and Simulation III; 124460N (2023) https://doi.org/10.1117/12.2653116
Event: SPIE Quantum West, 2023, San Francisco, California, United States

Abstract

Wavelength tunability in quantum key distribution (QKD) is desirable as noise can be introduced to the quantum channel if there is significant traffic near the same wavelength as the quantum data. Today’s QKD systems are typically of fixed wavelength due to the single-mode lasers used to encode qubits. We present a new optical transmitter design consisting of a multi-modal Fabry Perot laser optically injection locked by a tunable laser, capable of encoding qubits at GHz speeds with a tunable wavelength of < 65 nm and perform proof-of-principle BB84 QKD over a range of wavelengths with secure bit rates of order Mb/s.

Conference Presentation

Citation Download Citation

Benjamin Griffiths, Yuen San Lo, James F. Dynes, Robert I. Woodward, and Andrew J. Shields "A wavelength tunable optical transmitter for quantum key distribution", Proc. SPIE 12446, Quantum Computing, Communication, and Simulation III, 124460N (8 March 2023); https://doi.org/10.1117/12.2653116

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