[WP4-B] Poster Session 2

[WP4-B13] 48-Gbit/s DP PSK Y-00 Quantum Stream Cipher Based on QPSK Data Modulation

〇Ken Tanizawa, Fumio Futami (Tamagawa Univ., Japan)

キーワード：Advanced modulation and demodulation , Digital signal processing techniques for optical communications

We experimentally demonstrate doubling the bit rate of digital-coherent PSK Y-00 cipher by employing QPSK data modulation. Encryption with 2¹⁸ (=262,144) randomized phase levels and digital decryption are achieved without significant negative impact on signal quality.