Frequency Conversion Interface towards Quantum Network: From Atomic Transition Line to Fiber Optical Communication Band
Quantum repeater is a key component of quantum network, and atomic memory is one of the important candidates for constructing quantum repeater. However, the atomic transition wavelength is not suitable for long-distance transmission in optical fiber. To bridge atomic memory and fiber communication,...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-06-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/13/6522 |
| _version_ | 1797480935454670848 |
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| author | Shujing Li Jiaxin Bao Qiqi Deng Lirong Chen Hai Wang |
| author_facet | Shujing Li Jiaxin Bao Qiqi Deng Lirong Chen Hai Wang |
| author_sort | Shujing Li |
| collection | DOAJ |
| description | Quantum repeater is a key component of quantum network, and atomic memory is one of the important candidates for constructing quantum repeater. However, the atomic transition wavelength is not suitable for long-distance transmission in optical fiber. To bridge atomic memory and fiber communication, we demonstrate a frequency conversion interface from rubidium D1 line (795 nm) to the optical communication L-band (1621 nm) based on difference frequency generation. To reduce broadband noise of spontaneous Raman scattering caused by strong pumping light, we use a combination of two cascaded etalons and a Fabry-Perot cavity with low finesse to narrow the noise bandwidth to 11.7 MHz. The filtering system is built by common optical elements and is easy to use; it can be widely applied in frequency conversion process. We show that the signal-noise ratio of the converted field is good enough to reduce the input photon number below 1 under the condition of low external device conversion efficiency (0.51%) and large duration of input pulse (250 ns). The demonstrated frequency conversion interface has important potential application in quantum networks. |
| first_indexed | 2024-03-09T22:07:19Z |
| format | Article |
| id | doaj.art-49af3a6472df4fadbb4606d33dad21dd |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T22:07:19Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-49af3a6472df4fadbb4606d33dad21dd2023-11-23T19:38:08ZengMDPI AGApplied Sciences2076-34172022-06-011213652210.3390/app12136522Frequency Conversion Interface towards Quantum Network: From Atomic Transition Line to Fiber Optical Communication BandShujing Li0Jiaxin Bao1Qiqi Deng2Lirong Chen3Hai Wang4State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, ChinaState Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, ChinaState Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, ChinaState Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, ChinaState Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, ChinaQuantum repeater is a key component of quantum network, and atomic memory is one of the important candidates for constructing quantum repeater. However, the atomic transition wavelength is not suitable for long-distance transmission in optical fiber. To bridge atomic memory and fiber communication, we demonstrate a frequency conversion interface from rubidium D1 line (795 nm) to the optical communication L-band (1621 nm) based on difference frequency generation. To reduce broadband noise of spontaneous Raman scattering caused by strong pumping light, we use a combination of two cascaded etalons and a Fabry-Perot cavity with low finesse to narrow the noise bandwidth to 11.7 MHz. The filtering system is built by common optical elements and is easy to use; it can be widely applied in frequency conversion process. We show that the signal-noise ratio of the converted field is good enough to reduce the input photon number below 1 under the condition of low external device conversion efficiency (0.51%) and large duration of input pulse (250 ns). The demonstrated frequency conversion interface has important potential application in quantum networks.https://www.mdpi.com/2076-3417/12/13/6522quantum networkfrequency conversion interfacedifference frequency generationoptical communication band |
| spellingShingle | Shujing Li Jiaxin Bao Qiqi Deng Lirong Chen Hai Wang Frequency Conversion Interface towards Quantum Network: From Atomic Transition Line to Fiber Optical Communication Band Applied Sciences quantum network frequency conversion interface difference frequency generation optical communication band |
| title | Frequency Conversion Interface towards Quantum Network: From Atomic Transition Line to Fiber Optical Communication Band |
| title_full | Frequency Conversion Interface towards Quantum Network: From Atomic Transition Line to Fiber Optical Communication Band |
| title_fullStr | Frequency Conversion Interface towards Quantum Network: From Atomic Transition Line to Fiber Optical Communication Band |
| title_full_unstemmed | Frequency Conversion Interface towards Quantum Network: From Atomic Transition Line to Fiber Optical Communication Band |
| title_short | Frequency Conversion Interface towards Quantum Network: From Atomic Transition Line to Fiber Optical Communication Band |
| title_sort | frequency conversion interface towards quantum network from atomic transition line to fiber optical communication band |
| topic | quantum network frequency conversion interface difference frequency generation optical communication band |
| url | https://www.mdpi.com/2076-3417/12/13/6522 |
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