[20p-A404-1~18] 3.9 Optical quantum physics and technologies (formerly 3.10)

[20p-A404-1] [Young Scientist Presentation Award Speech] Improvement of Atomic-Frequency-Comb memory efficiency by Comb Transfer method

〇Syouichiro Yasui^1,2, Masaya Hiraishi³, Atsushi Ishizawa¹, Hiroo Omi⁴, Tomohiro Inaba¹, Xuejun Xu¹, Reina Kaji², Satoru Adachi², Takehiko Tawara⁵ (1.NTT BRL, 2.Grad. Sch. Eng. Hokkaido Univ., 3.Univ. of Otago, 4.Yamato Univ., 5.Nihon Univ.)

Keywords:Rare earth ion doped crystals, Quantum memory, Atomic frequency comb

Toward the development of groval quantum information networks, the photon-echo type quantum memory (QM) based on Atomic Frequency Comb (AFC) has been actively developed. We have studied ¹⁶⁷Er³⁺:Y₂SiO₅ crystals to realize communication wavelength band AFC QM. In this report, we show that the AFC memory efficiency has been dramatically improved by using a novel AFC fabrication method based on an optical frequency comb.