Journal
OPTICS LETTERS
Volume 42, Issue 7, Pages 1201-1204Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.42.001201
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Funding
- National Natural Science Foundation of China (NSFC) [91436211, 11374104, 10974057]
- Program for New Century Excellent Talents in University (NCET) [NCET-10-0383]
- Shu Guang project [11SG26]
- Shanghai Pujiang Program [09PJ1404400]
- National Basic Research Program of China [2016YFA0302103]
- SRFDP [20130076110011]
- Program of Introducing Talents of Discipline to Universities [B12024]
- Natural Science Foundation of Shanghai [17ZR1442900]
- Program of State Key Laboratory of Advanced 207 Optical Communication Systems and Networks [2016GZKF0JT003]
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Generation of multimode quantum states has drawn much attention recently due to its importance for both fundamental science and the future development of quantum technologies. Here, by using a four-wave mixing process with a conical pump beam, we have experimentally observed about -3.8 dB of intensity-difference squeezing between a single-axial probe beam and a conical conjugate beam. The multi-spatial-mode nature of the generated quantum-correlated beams has been shown by comparing the variation tendencies of the intensity-difference noise of the probe and conjugate beams under global attenuation and local cutting attenuation. Due to its compactness, phase-insensitive nature, and easy scalability, our scheme may find potential applications in quantum imaging, quantum information processing, and quantum metrology. (C) 2017 Optical Society of America
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