Interference of Short Optical Pulses from Independent Gain-Switched Laser Diodes for Quantum Secure Communications
Z. L. Yuan, M. Lucamarini, J. F. Dynes, B. Fröhlich, M. B. Ward, A. J. Shields · Physical Review Applied · 2014
Gain-switched lasers are the ideal light source for quantum secure communications, as they are fast, compact, and present intrinsically randomized phase. The authors demonstrate the ability to interfere with high visibility between independent ultrashort light pulses. This result paves the way to high-bit-rate applications based on second-order interference, most notably quantum key distribution that is independent of the measurement device.