Long⁃term optical memory based on crystal waveguide

ZHENG Liang; LIU Chao; ZHOU Zongquan; LI Chuanfeng

doi:10.3969/j.issn.1007-5461.2025.02.010

Journals >Chinese Journal of Quantum Electronics >Volume 42 >Issue 2 >Page 246 > Article

Chinese Journal of Quantum Electronics
Vol. 42, Issue 2, 246 (2025)

Long⁃term optical memory based on crystal waveguide

ZHENG Liang¹, LIU Chao¹, ZHOU Zongquan^1,2,*, and LI Chuanfeng^1,2,**

Author Affiliations

¹CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China

²Hefei National Laboratory, Hefei 230088, China

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DOI: 10.3969/j.issn.1007-5461.2025.02.010 Cite this Article

Liang ZHENG, Chao LIU, Zongquan ZHOU, Chuanfeng LI. Long⁃term optical memory based on crystal waveguide[J]. Chinese Journal of Quantum Electronics, 2025, 42(2): 246 Copy Citation Text

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The experimental setup. (a) Cross section of the crystal waveguide; (b) Top view of the crystal waveguide with light passing through; (c) Sketch of the experimental setup FC: fiber coupler; AOM: acousto-optic modulator; HWP: half-wave plate; PBS: polarizing beam splitter; FR: Faraday rotator

Fig. 1. The experimental setup. (a) Cross section of the crystal waveguide; (b) Top view of the crystal waveguide with light passing through; (c) Sketch of the experimental setup FC: fiber coupler; AOM: acousto-optic modulator; HWP: half-wave plate; PBS: polarizing beam splitter; FR: Faraday rotator

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Experimental protocol. (a) Energy levels of the 70↔D 50 transition of 151Eu3+:Y2SiO5;(b) Initial state preparation sequence and freqency span of each pulse; (c) SLSE pulse sequense

Fig. 2. Experimental protocol. (a) Energy levels of the

{}^{7}_{0} \leftrightarrow {{}^{5}D}_{0}

transition of ¹⁵¹Eu³⁺:Y₂SiO₅;(b) Initial state preparation sequence and freqency span of each pulse; (c) SLSE pulse sequense

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Fig. 3. Experimental result of SLSE light storage. (a) Histogram of light storage experiment for 1.4 s;(b) Storage efficiency depending on the storage time

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Liang ZHENG, Chao LIU, Zongquan ZHOU, Chuanfeng LI. Long⁃term optical memory based on crystal waveguide[J]. Chinese Journal of Quantum Electronics, 2025, 42(2): 246

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