Experimental observation of coherent interaction between laser and erbium ions ensemble doped in fib

• 作 者: Qi XI Shihai WEI Chenzhi YUAN Xueying ZHANG You WANG Haizhi SONG Guangwei DENG Bo JING Daniel OBLAK Qiang ZHOU
• 机 构: Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of C
• 出 处: 中国科学：信息科学（英文版）
• 发表日期: 2020年8期
• 关键词: quantum memory erbium-doped fiber coherent interaction transition dipole moment

Rare-earth ions doped in solid-state materials are considered promising candidates for quantum information applications,especially for photonic quantum memory.Among them,erbium ions doped in an optical fiber have attracted a lot of attentions due to their ability to provide efficient photon-atom interaction on a telecom-C band compatible transition.The coherent photon-atom interaction,which is crucial for quantum memory,has not yet been investigated for erbium ions doped in fiber at the temperature of sub 10 mK with the magnetic environment.In this paper,we experimentally observe optical nutation,which results from the coherent interaction between laser and erbium ions ensemble,in a piece of 9.5-m-long fiber with the erbium concentration of 200 ppm.We also extract the transition dipole moment from the results of optical nutation and further investigate its dependence on laser wavelength and magnetic field.A transition dipole moment of (3.424±0.019)× 10-32 C.m is obtained at the wavelength of 1537 nm and magnetic field of 0.2 T.Our results could pave the way for realizing solid-state quantum networks at telecom-C band.