0.54 μm resolution two-photon interference with dispersion cancellation for quantum optical coherence tomography

Okano, Masayuki; Lim, Hwan Hong; Okamoto, Ryo; Nishizawa, Norihiko; Kurimura, Sunao; Takeuchi, Shigeki

doi:10.1038/srep18042

Cited by 65 publications

(40 citation statements)

References 49 publications

(102 reference statements)

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“…Two end faces are coated with AR films for wavelength of both 795 nm and 397.5 nm. Because the injected fundamental wavelength is as short as 795 nm and the MgO:PPSLT crystal with 2nd-order of the quasi-phase-matching (QPM) structure is not commercially available, the adopted periodic poled crystal has to be made into 3rd-order quasiphase-matching (QPM) structure and the poling period is 9.18 μm @ 30 • C [21]. The absorption coefficient at 397.5 nm of 0.015 cm −1 is supplied by the manufacturer.…”

Section: Methodsmentioning

confidence: 99%

Generation of high-power single-frequency 3975 nm laser with long lifetime and perfect beam quality in an external enhancement-cavity with MgO-doped PPSLT

Jiao

Wei

et al. 2016

Opt. Express

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Continuous-wave single-frequency high power 397.5 nm laser with long lifetime and perfect beam quality is one of the essential resource to generate the squeezed and entanglement states of optical beams resonant with D₁ line of Rubidium atoms at 795 nm. In this paper, We present the experimental generation of single-frequency high power 397.5 nm ultra-violet (UV) laser with long lifetime and perfect beam quality by using periodically poled MgO-doped stoichiometric lithium tantalate (MgO:PPSLT) crystal as the frequency doubler in an external enhancement ring cavity. When the transmission of the input coupler is 5.5%, the maximal output power of single-frequency 397.5 nm UV laser of 407 mW is obtained under the incident pump power of 1.9 W with the corresponding conversion efficiency of 22.8%. When the output power is 290 mW, the measured power stability and the beam quality are lower than 0.28% and 1.02, respectively. Moreover, any damage is not observed in our experiment which lasts about 1 year.

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Section: Methodsmentioning

confidence: 99%

Generation of high-power single-frequency 3975 nm laser with long lifetime and perfect beam quality in an external enhancement-cavity with MgO-doped PPSLT

Jiao

Wei

et al. 2016

Opt. Express

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“…Even though the demonstrated resolution is on the order of tens of microns, it can be reduced by at least one order of magnitude using dedicated methods of generation of broadband SPDC. The methods include but are not limited to using several SPDC crystals [26] or crystals with chirped poling period [27,28], inhomogeneous heating [29] and applying electric field [30] to the SPDC crystal. Moreover, the smooth spectral shape of SPDC is beneficial for OCT in comparison with some classical broadband sources, which is essential for providing high-quality interferograms and better signal-tonoise ratio [31].…”

Section: Discussionmentioning

confidence: 99%

Tunable optical coherence tomography in the infrared range using visible photons

Paterova

Yang

et al. 2018

Quantum Sci. Technol.

100

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Optical coherence tomography (OCT) is an appealing technique for bio-imaging, medicine, and material analysis. For many applications, OCT in mid-and far-infrared (IR) leads to significantly more accurate results. Reported mid-IR OCT systems require light sources and photodetectors which operate in mid-IR range. These devices are expensive and need cryogenic cooling. Here, we report a proof-of-concept demonstration of a wavelength tunable IR OCT technique with detection of only visible range photons. Our method is based on the nonlinear interference of frequency correlated photon pairs. The nonlinear crystal, introduced in the Michelson-type interferometer, generates photon pairs with one photon in the visible and another in the IR range. The intensity of detected visible photons depends on the phase and loss of IR photons, which interact with the sample under study. This enables us to characterize sample properties and perform imaging in the IR range by detecting visible photons. The technique possesses broad wavelength tunability and yields a fair axial and lateral resolution, which can be tailored to the specific application. The work contributes to the development of versatile 3D imaging and material characterization systems working in a broad range of IR wavelengths, which do not require the use of IR-range light sources and photodetectors.

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“…For example, strong temporal correlations between photons were used for a single-photon calibration of the efficiency of retinal cells 3 and enhancing the nonlinear response of biological samples 4 . Furthermore, two-photon interference effects have formed the basis for dispersion-free optical coherence tomography [5][6][7] , microscopy with enhanced phase contrast 8,9 , and noiserobust spectroscopy of nanostructures 10 to name a few.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear interference in crystal superlattices

Paterova¹,

Krivitsky²

2020

Light Sci Appl

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Nonlinear interferometers with correlated photons hold promise to advance optical characterization and metrology techniques by improving their performance and affordability. These interferometers offer subshot noise phase sensitivity and enable measurements in detection-challenging regions using inexpensive and efficient components. The sensitivity of nonlinear interferometers, defined by the ability to measure small shifts of interference fringes, can be significantly enhanced by using multiple nonlinear elements, or crystal superlattices. However, to date, experiments with more than two nonlinear elements have not been realized, thus hindering the potential of nonlinear interferometers. Here, we build a nonlinear interferometer with up to five nonlinear elements, referred to as superlattices, in a highly stable and versatile configuration. We study the modification of the interference pattern for different configurations of the superlattices and perform a proof-of-concept gas sensing experiment with enhanced sensitivity. Our approach offers a viable path towards broader adoption of nonlinear interferometers with correlated photons for imaging, interferometry, and spectroscopy.

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0.54 μm resolution two-photon interference with dispersion cancellation for quantum optical coherence tomography

Cited by 65 publications

References 49 publications

Generation of high-power single-frequency 3975 nm laser with long lifetime and perfect beam quality in an external enhancement-cavity with MgO-doped PPSLT

Generation of high-power single-frequency 3975 nm laser with long lifetime and perfect beam quality in an external enhancement-cavity with MgO-doped PPSLT

Tunable optical coherence tomography in the infrared range using visible photons

Nonlinear interference in crystal superlattices

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