[6a-PA4-1~6] 3.10 Optical quantum physics and technologies

[6a-PA4-3] Autopower control mode of quantum-entangled photon-pair source based on efficiency of differential-frequency-generation

〇Shin Arahira¹, Hitoshi Murai¹, Hironori Sasaki¹ (1.OKI)

Keywords:quantum entanglement, long-term stability

We report a novel method for integrity monitoring and feedback of quantum-entangled photon pair source based on efficiency of differential-frequency generation, for the long-term stable operation. The experimental results using a periodically poled LiNbO₃ device verified the merit of the proposed system. The device could generate the photon-pairs, maintaining the mean-number of the photon pairs, even when the device operation temperature changed from 9℃ to 26℃ and the operation condition was deviated from the optimum (phase matched) condition.