Multiple frequency conversion via atomic spin coherence of storing a light pulse<xref ref-type="fn" rid="cpb142853fn1">*</xref>

Multiple frequency conversion via atomic spin coherence of storing a light pulse*

Wang Lei^a), Luo Meng-Xi^a), Sun Jia-Xiang^a), Sun Yuan-Hang^a), Chen Yi^b), Wei Xiao-Gang^c), Kang Zhi-Hui^a), Wang Hai-Hua^a)†, Gao Jin-Yue^a)

(a) Level coupling scheme of Pr ions, and (b) experimental schematic diagram of the frequency conversion.