Biphoton spectroscopy in a strongly nondegenerate regime of SPDC

Калачев, А. А.; Kalashnikov, Dmitry; Калинкин, А. М.; Митрофанова, Т. Г.; Shkalikov, A. V.; Самарцев, В. В.

doi:10.1002/lapl.200810044

Cited by 31 publications

(24 citation statements)

References 9 publications

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“…It is therefore possible to expand it around the central frequencies ω 1 and ω 2 of the two downconverted beams. For type-I downconversion, the group velocities dk 1 /dω 1 and dk 2 /dω 2 are identical [unless the PDC process is triggered in a strongly non-degenerate regime (Kalachev et al, 2008)], and the expansion around the central frequencies yields (Joobeur et al, 1994;Wasilewski et al, 2006) …”

Section: Entangled Photons Generation By Parametric Down Conversionmentioning

confidence: 99%

Nonlinear optical signals and spectroscopy with quantum light

2016

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Conventional nonlinear spectroscopy uses classical light to detect matter properties through the variation of its response with frequencies or time delays. Quantum light opens up new avenues for spectroscopy by utilizing parameters of the quantum state of light as novel control knobs and through the variation of photon statistics by coupling to matter. We present an intuitive diagrammatic approach for calculating ultrafast spectroscopy signals induced by quantum light, focusing on applications involving entangled photons with nonclassical bandwidth properties -known as "time-energy entanglement". Nonlinear optical signals induced by quantized light fields are expressed using time ordered multipoint correlation functions of superoperators in the joint field plus matter phase space. These are distinct from Glauber's photon counting formalism which use normally ordered products of ordinary operators in the field space. One notable advantage for spectroscopy applications is that entangled photon pairs are not subjected to the classical Fourier limitations on the joint temporal and spectral resolution. After a brief survey of properties of entangled photon pairs relevant to their spectroscopic applications, different optical signals, and photon counting setups are discussed and illustrated for simple multi-level model systems.

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Section: Entangled Photons Generation By Parametric Down Conversionmentioning

confidence: 99%

Nonlinear optical signals and spectroscopy with quantum light

2016

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“…Squeezing has been used for sub-SNL precision in two-photon absorption spectroscopy by using optical parametric oscillator (OPO) twin beams [14]. Exploiting frequency correlations, photon pairs have been used to reveal absorption spectra [15][16][17][18]-for low illumination, correlated photon pairs enable a high signal-to-noise ratio to be maintained despite increasing levels of background illumination [19]-however, these spectroscopy experiments did not achieve sub-SNL precision. To the best of our knowledge, no experiments exploring precision absorption measurements at or near the ultimate quantum limit [4] have been reported.…”

Section: Introductionmentioning

confidence: 99%

Absorption spectroscopy at the ultimate quantum limit from single-photon states

et al. 2017

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Absorption spectroscopy is routinely used to characterise chemical and biological samples. For the state-of-the-art in laser absorption spectroscopy, precision is theoretically limited by shot-noise due to the fundamental Poisson-distribution of photon number in laser radiation. In practice, the shotnoise limit can only be achieved when all other sources of noise are eliminated. Here, we use wavelength-correlated and tuneable photon pairs to demonstrate how absorption spectroscopy can be performed with precision beyond the shot-noise limit and near the ultimate quantum limit by using the optimal probe for absorption measurement-single photons. We present a practically realisable scheme, which we characterise both the precision and accuracy of by measuring the response of a control feature. We demonstrate that the technique can successfully probe liquid samples and using two spectrally similar types of haemoglobin we show that obtaining a given precision in resolution requires fewer heralded single probe photons compared to using an idealised laser.

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“…The coincidence count rate from the two detectors is used to reproduce the spectral function of the remote object. Biphoton spectroscopy was first reported in 2003 [1] followed by similar works with novel implementations in [2][3][4]. In this letter, we report a novel technique for biphoton spectroscopy using a tunable upconversion detector for local spectral analysis of the idler beam.…”

Section: Introductionmentioning

confidence: 93%

Frequency correlated biphoton spectroscopy using tunable upconversion detector

Slattery

Kuo

et al. 2013

Laser Phys. Lett.

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We demonstrate a scheme for frequency correlated biphoton spectroscopy using a strongly non-degenerate downconversion source and a tunable upconversion detector. In this scheme, the spectral function at one wavelength range of a remote object can be reproduced by locally measuring another wavelength range using an upconversion detector and monitoring the coincidence counts. The spectral resolution of the system is better than 0.1 nm, corresponding to the acceptance width of the upconversion detector, while the measurement range is determined by the linewidth of the source.

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Biphoton spectroscopy in a strongly nondegenerate regime of SPDC

Cited by 31 publications

References 9 publications

Nonlinear optical signals and spectroscopy with quantum light

Nonlinear optical signals and spectroscopy with quantum light

Absorption spectroscopy at the ultimate quantum limit from single-photon states

Frequency correlated biphoton spectroscopy using tunable upconversion detector

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