Characterization of a fiber-based source of heralded single photons

Yang, Lei; Ma, Xinbin; Guo, Xueshi; Cui, Liang; Li, Xiaoying

doi:10.1103/physreva.83.053843

Cited by 32 publications

(22 citation statements)

References 27 publications

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“…This high performance in terms of source quality is also a consequence of the Raman-free feature of our source. Moreover, the measured g (2) H (0) increases quadratically with pump power (blue curve) as expected 25 , whereas it would saturate to a linear dependence in the presence of RS noise 44 .…”

Section: Carsupporting

confidence: 66%

Raman-free fibered photon-pair source

Cordier

Delaye

Gérôme

et al. 2020

Sci Rep

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Raman-scattering noise in silica has been the key obstacle toward the realisation of high quality fiber-based photon-pair sources. Here, we experimentally demonstrate how to get past this limitation by dispersion tailoring a xenon-filled hollow-core photonic crystal fiber. The source operates at room temperature, and is designed to generate Raman-free photon-pairs at useful wavelength ranges, with idler at the telecom, and signal at a visible range. We achieve a coincidence-to-accidentals ratio as high as 2740 combined with an ultra low heralded gH (0) = 0.002, indicating a very high signal to noise ratio and a negligible multi-photon emission probability. Moreover, by gas-pressure tuning, we demonstrate the control of photon frequencies over a range as large as 13 THz, covering S-C and L telecom band for the idler photon. This work demonstrates that hollow-core photonic crystal fiber is an excellent platform to design high quality photon-pair sources, and could play a driving role in the emerging quantum technology.Among the numerous platforms that have been tested in quantum information, χ (2) nonlinear media and, in particular, bulk crystals have been historically the workhorse for photon-pair generation due to the relative ease in terms of experimental setup, their cost and their availability 1 . Four-wave mixing mechanism in χ (3) media, and in particular waveguides and optical fibers have gained much attention in the recent years because of the new prospects they offer in terms of scalability and integrability. For instance, more than 550 silicon-based photonic components have been recently integrated on a single silicon chip, including 16 identical four-wave mixing photon-pair sources 2 . Alternatively, fiber-based photon-pair sources have many advantages; they are easily manufacturable, cost effective, robust, alignment-free and compatible with fiber optical network since the photon-pairs are directly emitted in the fundamental transverse guided mode of a fiber. Furthermore, and unlike silicon-based materials, optical fibers don't suffer from two-photon absorption or free carriers effect 3 , and a dispersion that can be readily engineered.Within the fiber-related endeavors, photon-pairs have been produced in many different architectures encompassing singlemode fiber 4, 5 , dispersion-shifted fiber 6-9 , birefringent single-mode fiber 10, 11 , micro/nano-fiber 12, 13 and photonic crystal fiber (PCF) [14][15][16][17][18][19][20] . However, the performances of these photon-pair sources are most often plagued by a concomitant nonlinear effect, Raman-scattering (RS). Indeed, in addition to the four-wave mixing process leading to photon-pair generation, an interaction between the pump and phonons in the medium results in the generation of scattered photons. Due to the amorphous nature of silica (i.e. the fiber core material), the Raman gain is broadband and continuous 21 , thus generating a large amount of scattered photons around the pump frequency. In fact, regardless of the photon-pair frequencies, some Rama...

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Section: Carsupporting

confidence: 66%

Raman-free fibered photon-pair source

Cordier

Delaye

Gérôme

et al. 2020

Sci Rep

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“…The pump envelope can be well determined. When the selfphase-modulation induced spectral broadening of the pump is negligible, the pump envelope function can be approximated as [13,15] …”

Section: A Phase-matching Function Of Spontaneous Four-wave Mixing Imentioning

confidence: 99%

Spectral properties of photon pairs generated by spontaneous four-wave mixing in inhomogeneous photonic crystal fibers

Cui

Li²,

Zhao³

2012

Phys. Rev. A

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The photonic crystal fiber (PCF) is one of the excellent media for generating photon pairs via spontaneous four-wave mixing. Here we study how the inhomogeneity of PCFs affect the spectral properties of photon pairs from both the theoretical and experimental aspects. The theoretical model shows that the photon pairs born in different places of the inhomogeneous PCF are coherently superposed, and a modulation in the broadened spectrum of phase-matching function will appear, which prevents the realization of spectral factorable photon pairs. In particular, the inhomogeneity induced modulation can be examined by measuring the spectrum of the individual signal or idler field when the asymmetric group-velocity matching condition is approximately fulfilled. Our experiments are performed by tailoring the spectrum of pulsed pump to satisfy the specified phase-matching condition. The observed spectra of individual signal photons, which are produced from different segments of the 1.9 m inhomogeneous PCF, agree with the theoretical predictions. The investigations are not only useful for fiber-based quantum state engineering, but also provide a dependable method to test the homogeneity of PCF.

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“…1 The latter relies on a strong quantum correlation between the amplitudes of optical fields for entanglement. 2,3 However, comparing with its discrete variable counterparts, [4][5][6] there are only a handful of methods for realizing the nonclassical light sources with continuous variables (CV). [7][8][9] The v ð2Þ -crystal based high gain optical parametric amplifier (OPA) is an efficient method for generating the CV nonclassical light.…”

mentioning

confidence: 99%

An all-fiber source of pulsed twin beams for quantum communication

Guo

Liu

et al. 2012

Applied Physics Letters

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Motivated by the pursuit of a simple system to produce a continuous variable non-classical light source for long-distance quantum communication, we construct an all-fiber source of pulsed twin beams in the 1550 nm band by using a high gain fiber optical parametric amplifier. The intensity-difference noise of the twin beams is below the shot noise limit by 3.1 dB (10.4 dB after correction for losses). A detailed study reveals a number of limiting factors for noise reduction. Therefore, further noise reduction will be feasible once care is taken for these limiting factors.

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Characterization of a fiber-based source of heralded single photons

Cited by 32 publications

References 27 publications

Raman-free fibered photon-pair source

Raman-free fibered photon-pair source

Spectral properties of photon pairs generated by spontaneous four-wave mixing in inhomogeneous photonic crystal fibers

An all-fiber source of pulsed twin beams for quantum communication

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