Upconversion detection near 2  μm at the single photon level

Shentu, Guo-Liang; Xia, Xiu-Xiu; Sun, Qi-Chao; Pelc, Jason S.; Fejer, M. M.; Zhang, Qiang; Pan, Jian-Wei

doi:10.1364/ol.38.004985

Cited by 18 publications

(9 citation statements)

References 21 publications

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“…Periodically poled lithium niobate (PPLN) technology has been widely used to efficiently generate photons, and it has been applied in the quantum domain to create heralded single-photon [1,2] and entangled photon pair sources [3][4][5][6][7], distribute/route entangled photons in optical networks [8][9][10], generate photon triplets [11], and perform coherent frequency conversion [12][13][14][15][16]. This work is focused on the development of a fiber-coupled heralded single-photon source (HSPS) that uses PPLN technology to create photon pairs at telecom wavelengths and can be operated with low power, economical continuous wave (CW) laser diodes.…”

Section: Introductionmentioning

confidence: 99%

Development of photon pair sources using periodically poled lithium niobate waveguide technology and fiber optic components

Oesterling

Monteiro

Krupa

et al. 2015

Journal of Modern Optics

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To support quantum technologies that require entangled photon pairs and/or heralded photons for operation, a photon pair source was developed that uses periodically poled lithium niobate (PPLN) waveguides that are coupled to optical fibers. Both Ti-indiffused and annealed proton-exchanged (APE) waveguide technologies were studied, and waveguide/fiber interfaces were designed to increase the coupling efficiency of the photon pairs into optical fiber. PPLN waveguide devices were fabricated and the optical loss, wavelength conversion efficiency, and heralding efficiency were measured. The maximum heralding efficiencies achieved were 75 and 68% for Ti-indiffused and APE waveguides, respectively. A compact photon pair source based on a packaged PPLN waveguide device and commercially available fiber optic components is presented

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Section: Introductionmentioning

confidence: 99%

Development of photon pair sources using periodically poled lithium niobate waveguide technology and fiber optic components

Oesterling

Monteiro

Krupa

et al. 2015

Journal of Modern Optics

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“…For the reported PPLN-waveguide-based up-conversion SPDs, the mode filter integrated in the waveguides was optimized for the fiber-waveguide coupling efficiency of the 1550 nm signal only, at the expense of low coupling efficiency for the longer pump wavelength. Therefore, as an example, 2 µm detection using an up-conversion SPD with coupling efficiency optimized for 1550 nm band suffers from low detection efficiency because 2 µm is now the signal [22]. Moreover, a new waveguide design with high coupling efficiency for both the signal and pump is needed to lower the requirement for pump power and thus reduce the system cost.…”

Section: Introductionmentioning

confidence: 99%

Upconversion single-photon detectors based on integrated periodically poled lithium niobate waveguides [Invited]

Liang

Chen

et al. 2018

J. Opt. Soc. Am. B

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We demonstrate up-conversion single-photon detectors based on integrated periodically poled lithium niobate waveguides, which incorporate two mode filters and a directional coupler. The two mode filters are optimized for the fiber-waveguide coupling efficiencies for 1550 nm and 1950 nm respectively while the directional coupler plays the role of wavelength combiner, making the overall system portable and low-cost. The two wavelengths pump each other in our detection system. We achieve detection efficiencies of 28% for 1550 nm and 27% for 1950 nm, respectively. This scheme provides an efficient integrated single-photon detection method for any two well-separated spectral bands in the whole low-loss range of lithium niobate waveguides.

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“…Infrared photon-number resolving detection and sensitive imaging have also been realized via frequency upconversion [17,18]. And this method has been extended to the longer wavelengths, leading to the sensitive detection of mid-infrared signals at single-photon level [19][20][21]. Especially, the UCDs have been implemented to the detection of different quantum states [22,23].…”

Section: Introductionmentioning

confidence: 99%

Quantum detector tomography of a single-photon frequency upconversion detection system

Chen

et al. 2016

Opt. Express

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We experimentally presented a full quantum detector tomography of a synchronously pumped infrared single-photon frequency upconversion detector. A maximum detection efficiency of 37.6% was achieved at the telecom wavelength of 1558 nm with a background noise about 1.0 × 10^-3 counts/pulse. The corresponding internal quantum conversion efficiency reached as high as 84.4%. The detector was then systematically characterized at different pump powers to investigate the quantum decoherence behavior. Here the reconstructed positive operator valued measure elements were equivalently illustrated with the Wigner function formalism, where the quantum feature of the detector is manifested by the presence of negative values of the Wigner function. In our experiment, pronounced negativities were attained due to the high detection efficiency and low background noise, explicitly showing the quantum feature of the detector. Such quantum detector could be useful in optical quantum state engineering, quantum information processing and communication.

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Upconversion detection near 2 μm at the single photon level

Cited by 18 publications

References 21 publications

Development of photon pair sources using periodically poled lithium niobate waveguide technology and fiber optic components

Development of photon pair sources using periodically poled lithium niobate waveguide technology and fiber optic components

Upconversion single-photon detectors based on integrated periodically poled lithium niobate waveguides [Invited]

Quantum detector tomography of a single-photon frequency upconversion detection system

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