Publications

Silicon photonic transceiver circuit for highspeed polarization-based discrete variable quantum key distribution

Cai, Hong; Long, Christopher M.; DeRose, Christopher T.; Boynton, Nicholas; Urayama, Junji U.; Camacho, Ryan C.; Pomerene, Andrew P.; Starbuck, Andrew L.; Trotter, Douglas C.; Davids, Paul D.; Lentine, Anthony L.

We demonstrate a silicon photonic transceiver circuit for high-speed discrete variable quantum key distribution that employs a common structure for transmit and receive functions. The device is intended for use in polarization-based quantum cryptographic protocols, such as BB84. Our characterization indicates that the circuit can generate the four BB84 states (TE/TM/45°/135° linear polarizations) with >30 dB polarization extinction ratios and gigabit per second modulation speed, and is capable of decoding any polarization bases differing by 90° with high extinction ratios.