Quantum optics and their applications (2)

[ALPS25-03] Dual-Wavelength Diode Laser Injection-Locked for Quantum Cryptography

*Yung-Hsuan Li¹, Szu-En Lai¹, Chih-Hsien Cheng³, Atsushi Matsumoto³, Kouichi Akahane³, Gong-Ru Lin^1,2 (1. National Taiwan University, 2. NTU-Tektronix Joint Research Center, Tektronix Inc. and National Taiwan University , 3. National Institute of Information and Communications Technology )

A dual-mode diode laser is master-to-slave injection-locked for wavelength switchable single-photon DPS-QKD transmission at a clock rate of 1 Gbit/s with interferometric visibility of 99.2% for stabilized decoding over 3000 seconds.