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Peng B, Wu K, Wu J, Guo Z, Wang Y, Li M, Zheng Y, Li X, Xia C, Bai S, Wang Y, Lin X. Laboratory demonstration of an off-axis optical bench design for future gravity missions. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2024; 95:094501. [PMID: 39225575 DOI: 10.1063/5.0215690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Accepted: 08/12/2024] [Indexed: 09/04/2024]
Abstract
The inter-satellite laser ranging interferometer is one of the core components of future gravity missions to achieve high ranging precision. This work builds a preliminary breadboard of the off-axis optical bench design, which integrates the merits of the off-axis optical bench design of GRACE Follow-On mission and other on-axis designs. The study finds that the displacement noise between two optical benches has been reduced to 20nm/Hz at a frequency of 10 mHz, and the differential wavefront sensing noise has been suppressed to 10-5rad/Hz at 1 kHz as well. In addition, the tilt-to-length coupling noise related to the piston effect is restricted within 30 μm/rad, and the relative parallelism error of the transmitting beam and receiving beam is less than 4.5%. The results show that this off-axis optical bench design is an important candidate for China's future gravity missions.
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Affiliation(s)
- Bo Peng
- Zhejiang Lab, Hangzhou 311121, China
- Beijing Institute of Space Mechanics and Electricity, Chinese Academy of Space Technology, Beijing 100094, China
- Morningside Center of Mathematics, Chinese Academy of Sciences, Beijing 100190, China
| | - Kailan Wu
- Beijing Institute of Space Mechanics and Electricity, Chinese Academy of Space Technology, Beijing 100094, China
- School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Jingui Wu
- Beijing Institute of Space Mechanics and Electricity, Chinese Academy of Space Technology, Beijing 100094, China
- School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Zhongkai Guo
- Beijing Institute of Space Mechanics and Electricity, Chinese Academy of Space Technology, Beijing 100094, China
| | - Yun Wang
- Beijing Institute of Space Mechanics and Electricity, Chinese Academy of Space Technology, Beijing 100094, China
| | - Ming Li
- DFH Satellite Co., Ltd., Beijing 100094, China
| | - Yongchao Zheng
- Beijing Institute of Space Mechanics and Electricity, Chinese Academy of Space Technology, Beijing 100094, China
| | - Xu Li
- Zhejiang Lab, Hangzhou 311121, China
| | - Chenhui Xia
- Beijing Institute of Space Mechanics and Electricity, Chinese Academy of Space Technology, Beijing 100094, China
| | - Shaojun Bai
- Beijing Institute of Space Mechanics and Electricity, Chinese Academy of Space Technology, Beijing 100094, China
| | | | - Xuling Lin
- Beijing Institute of Space Mechanics and Electricity, Chinese Academy of Space Technology, Beijing 100094, China
- School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China
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Shi S, Wu Y, Gao L, Zheng LA, Tian L, Wang Y, Li W, Zheng Y. Generating six pairs of bandwidth-expanded entangled sideband modes via time delay compensation. OPTICS LETTERS 2023; 48:3111-3114. [PMID: 37262293 DOI: 10.1364/ol.493217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 05/14/2023] [Indexed: 06/03/2023]
Abstract
Quantum entanglement is an important pillar of quantum information processing. In addition to the entanglement degree, the bandwidth of entangled states becomes another focus of quantum communication. Here, by virtue of a broadband frequency-dependent beam splitter, we experimentally demonstrate six pairs of independent entangled sideband modes with maximum entanglement degree of 8.1 dB. Utilizing a time delay compensation scheme, the bandwidth of independent entangled sideband modes is expanded to dozens of megahertz. This work provides a valuable resource to implement efficient quantum information processing.
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Tian Y, Sun X, Wang Y, Li Q, Tian L, Zheng Y. Cavity enhanced parametric homodyne detection of a squeezed quantum comb. OPTICS LETTERS 2022; 47:533-536. [PMID: 35103674 DOI: 10.1364/ol.446645] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 12/19/2021] [Indexed: 06/14/2023]
Abstract
A squeezed state with higher-order sidebands is a valuable quantum resource for channel multiplexing quantum communication. However, balanced homodyne detection used in nonclassical light detection has a trade-off performance between the detection bandwidth and clearance, in which the verification of a highly squeezing factor faces a challenge. Here, we construct two optical parametric amplifiers with cavity enhancement; one is for the generation of a -10.5 dB squeezed vacuum state, and the other is for all-optical phase-sensitive parametric homodyne detection. Finally, -6.5 dB squeezing at the carrier with 17 pairs of squeezing sidebands (bandwidth of 156 GHz) is directly and simultaneously observed. In particular, for the cavity-enhanced parametric oscillation and detection processes, we analyze the limiting factors of the detectable bandwidth and measurement deviation from the generated value, which indicates that the length difference and propagation loss between two optical parametric amplifiers should be as small as possible to improve the detection performance. The experimental results confirm our theoretical analysis.
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