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Peřina J, Thapliyal K, Haderka O, Michálek V, Machulka R. Generalized sub-Poissonian states of two-beam fields. OPTICS EXPRESS 2024; 32:537-550. [PMID: 38175081 DOI: 10.1364/oe.511065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Accepted: 12/11/2023] [Indexed: 01/05/2024]
Abstract
Two-beam states obtained by partial photon-number-resolving detection in one beam of a multi-mode twin beam are experimentally investigated using an intensified CCD camera. In these states, sub-Poissonian photon-number distributions in one beam are accompanied by sub-shot-noise fluctuations in the photon-number difference of both beams. Multi-mode character of the twin beam implying the beam nearly Poissonian statistics is critical for reaching sub-Poissonian photon-number distributions, which contrasts with the use of a two-mode squeezed vacuum state. Relative intensities of both nonclassical effects as they depend on the generation conditions are investigated both theoretically and experimentally using photon-number distributions of these fields. Fano factor, noise-reduction parameter, local and global nonclassicality depths, degree of photon-number coherence, mutual entropy as a non-Gaussianity quantifier, and negative quasi-distributions of integrated intensities are used to characterize these fields. Spatial photon-pair correlations as means for improving the field properties are employed. These states are appealing for quantum metrology and imaging including the virtual-state entangled-photon spectroscopy.
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Peřina J. Waves in spatio-spectral and -temporal coherence of evolving ultra-intense twin beams. Sci Rep 2019; 9:4256. [PMID: 30862907 PMCID: PMC6414532 DOI: 10.1038/s41598-019-39482-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 01/23/2019] [Indexed: 11/08/2022] Open
Abstract
Waves in the spatio-spectral and -temporal coherence of evolving ultra-intense twin beams are predicted: Twin beams with low intensities attain maximal coherence in the beam center until certain threshold intensity is reached. Then the area of maximal coherence moves with increasing intensity from the beam center towards its edges leaving the beam center with low coherence (the first coherence wave). For even larger intensities, a new coherence maximum is gradually built in the beam center with the increasing intensity and, later, it again moves towards the beam edges forming the second coherence wave. Rotationally-symmetric twin beams are analyzed within a three-dimensional model that couples spectral and spatial degrees of freedom. Relation between the twin-beam coherence and its local density of modes during the nonlinear evolution is discussed.
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Affiliation(s)
- Jan Peřina
- Joint Laboratory of Optics of Palacký University and Institute of Physics of the Czech Academy of Sciences, Faculty of Science, Palacký University, 17. listopadu 12, 77146, Olomouc, Czech Republic.
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Samantaray N, Ruo-Berchera I, Meda A, Genovese M. Realization of the first sub-shot-noise wide field microscope. LIGHT, SCIENCE & APPLICATIONS 2017; 6:e17005. [PMID: 30167268 PMCID: PMC6062230 DOI: 10.1038/lsa.2017.5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 01/16/2017] [Accepted: 01/24/2017] [Indexed: 05/31/2023]
Abstract
Recently, several proof of principle experiments have demonstrated the advantages of quantum technologies over classical schemes. The present challenge is to surpass the limits of proof of principle demonstrations to approach real applications. This letter presents such an achievement in the field of quantum enhanced imaging. In particular, we describe the realization of a sub-shot-noise wide field microscope based on spatially multi-mode non-classical photon number correlations in twin beams. The microscope produces realtime images of 8000 pixels at full resolution, for a 500 μm2 field of view, with noise reduced to 80% of the shot noise level (for each pixel), which is suitable for absorption imaging of complex structures. By fast post-elaboration, specifically applying a quantum enhanced median filter, the noise can be further reduced (to <30% of the shot noise level) by setting a trade-off with the resolution, thus achieving the best sensitivity per incident photon reported in absorption microscopy.
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Affiliation(s)
- Nigam Samantaray
- INRIM, Strada delle Cacce 91, I-10135 Torino, Italy
- Politecnico di Torino, Corso Duca degli Abruzzi, 24, I-10129 Torino, Italy
| | | | - Alice Meda
- INRIM, Strada delle Cacce 91, I-10135 Torino, Italy
| | - Marco Genovese
- INRIM, Strada delle Cacce 91, I-10135 Torino, Italy
- INFN, Via P. Giuria 1, I-10125 Torino, Italy
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Brida G, Caspani L, Gatti A, Genovese M, Meda A, Berchera IR. Measurement of sub-shot-noise spatial correlations without background subtraction. PHYSICAL REVIEW LETTERS 2009; 102:213602. [PMID: 19519105 DOI: 10.1103/physrevlett.102.213602] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2008] [Indexed: 05/27/2023]
Abstract
In this Letter we present the measurement of sub-shot-noise spatial correlations without any subtraction of background, a result paving the way to realize sub-shot-noise imaging of weak objects.
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Guo R, Laurat J, Gao J, Xie C, Peng K. Application of an all-solid-state, frequency-doubled Nd:YAP laser to the generation of twin beams at 1080 nm. APPLIED OPTICS 2002; 41:2304-2307. [PMID: 12003224 DOI: 10.1364/ao.41.002304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A laser-diode-pumped intracavity frequency-doubled Nd:YAP/KTP laser is presented. Over 110 mw of TEM00 single-frequency output power at 540-nm wavelength was obtained. The output green laser was employed to pump a semimonolithic nondegenerate optical parametric oscillator to produce intensity quantum correlated twin beams at 1080 nm, and the maximum quantum noise squeezing of 74% (5.9dB) on the intensity difference fluctuation between the twin beams is observed. The threshold was reduced and the stability was increased significantly when compared with similar lamp-pumped systems.
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Affiliation(s)
- Ruixiang Guo
- The State Key Laboratory of Quantum Optics and Quantum Optical Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan, China.
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Gao J, Cui F, Xue C, Xie C, Kunchi P. Generation and application of twin beams from an optical parametric oscillator including an alpha-cut KTP crystal. OPTICS LETTERS 1998; 23:870-872. [PMID: 18087369 DOI: 10.1364/ol.23.000870] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Measurement slight amounts of absorption of light with accuracy beyond the standard quantum limit has been experimentally demonstrated. The quantum-correlated twin beams used in the measurement were generated from a nondegenerate optical parametric oscillator including an alpha-cut KTiOPO(4) crystal pumped by an intracavity frequency-doubled Nd:YAG laser. The noise in the intensity difference between the twin beams was reduced by 88% below the standard quantum limit (SQL). The signal-to-noise ratio was improved by 7 dB with respect to the SQL of the total light employed in the experiment and by 4 dB with respect to that of the signal light.
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Schneider K, Bruckmeier R, Hansen H, Schiller S, Mlynek J. Bright squeezed-light generation by a continuous-wave semimonolithic parametric amplifier. OPTICS LETTERS 1996; 21:1396-1398. [PMID: 19876364 DOI: 10.1364/ol.21.001396] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Continuous-wave amplitude-squeezed light at 1064 nm has been generated with excellent long-term stability by use of a dual-port type I degenerate optical parametric amplifier pumped by a frequency-doubled Nd:YAG laser. A seed wave at 1064 nm is resonantly injected through the low-transmission cavity port, whereas the parametrically deamplified and squeezed output wave is extracted from the high-transmission port. Amplitude noise reduction of as much as 4.3 dB is observed directly at an output power of 0.15 mW. Stable noise suppression exceeding 3.8 dB is obtained for several hours by phase locking of the pump wave. The longterm stability and simplicity make this device suitable for sub-shot-noise metrology.
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Wineland DJ, Bollinger JJ, Itano WM, Heinzen DJ. Squeezed atomic states and projection noise in spectroscopy. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1994; 50:67-88. [PMID: 9910869 DOI: 10.1103/physreva.50.67] [Citation(s) in RCA: 172] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Wineland DJ, Bollinger JJ, Itano WM, Moore FL, Heinzen DJ. Spin squeezing and reduced quantum noise in spectroscopy. PHYSICAL REVIEW A 1992; 46:R6797-R6800. [PMID: 9908086 DOI: 10.1103/physreva.46.r6797] [Citation(s) in RCA: 185] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Ou ZY, Pereira SF, Kimble HJ. Realization of the Einstein-Podolsky-Rosen paradox for continuous variables in nondegenerate parametric amplification. ACTA ACUST UNITED AC 1992. [DOI: 10.1007/bf00325015] [Citation(s) in RCA: 145] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Polzik ES, Carri J, Kimble HJ. Spectroscopy with squeezed light. PHYSICAL REVIEW LETTERS 1992; 68:3020-3023. [PMID: 10045587 DOI: 10.1103/physrevlett.68.3020] [Citation(s) in RCA: 94] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Huang J, Kumar P. Observation of quantum frequency conversion. PHYSICAL REVIEW LETTERS 1992; 68:2153-2156. [PMID: 10045322 DOI: 10.1103/physrevlett.68.2153] [Citation(s) in RCA: 68] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Wong NC. Gravity-wave detection via an optical parametric oscillator. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1992; 45:3176-3183. [PMID: 9907353 DOI: 10.1103/physreva.45.3176] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Davidovich L. Quantum noise reduction in two-photon oscillators. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1992; 45:3139-3149. [PMID: 9907350 DOI: 10.1103/physreva.45.3139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Townsend PD, Loudon R. Quantum-noise reduction at frequencies up to 0.5 GHz using pulsed parametric amplification. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1992; 45:458-467. [PMID: 9906745 DOI: 10.1103/physreva.45.458] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Mertz J, Heidmann A, Fabre C. Generation of sub-Poissonian light using active control with twin beams. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1991; 44:3229-3238. [PMID: 9906324 DOI: 10.1103/physreva.44.3229] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Tapster PR, Seward SF, Rarity JG. Sub-shot-noise measurement of modulated absorption using parametric down-conversion. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1991; 44:3266-3269. [PMID: 9906327 DOI: 10.1103/physreva.44.3266] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Blockley CA, Walls DF. Intensity fluctuations in a frequency down-conversion process with three-level atoms. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1991; 43:5049-5056. [PMID: 9905625 DOI: 10.1103/physreva.43.5049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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