1. Articles from Maxime Hugues

    1-3 of 3
    1. GaAs-Based Superluminescent Light-Emitting Diodes with 290-nm Emission Bandwidth by Using Hybrid Quantum Well/Quantum Dot Structures

      GaAs-Based Superluminescent Light-Emitting Diodes with 290-nm Emission Bandwidth by Using Hybrid Quantum Well/Quantum Dot Structures

      A high-performance superluminescent light-emitting diode (SLD) based upon a hybrid quantum well (QW)/quantum dot (QD) active element is reported and is assessed with regard to the resolution obtainable in an optical coherence tomography system. We report on the appearance of strong emission from higher order optical transition from the QW in a hybrid QW/QD structure. This additional emission broadening method contributes significantly to obtaining a 3-dB linewidth of 290 nm centered at 1200 nm, with 2.4 mW at room temperature.

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    2. Quantum Dot Superluminescent Diodes for Optical Coherence Tomography: Device Engineering

      Quantum Dot Superluminescent Diodes for Optical Coherence Tomography: Device Engineering

      We present a 18 mW fiber-coupled single-mode superluminescent diode with 85 nm bandwidth for application in optical coherence tomography (OCT). First, we describe the effect of quantum dot (QD) growth temperature on optical spectrum and gain, highlighting the need for the optimization of epitaxy for broadband applications. Then, by incorporating this improved material into a multicontact device, we show how bandwidth and power can be controlled. We then go on to show how the spectral shape influences the autocorrelation function, which exhibits a coherence length of <11 $mu$m, and relative noise is found to be 10 dB lower than that of a thermal source. Finally, we apply the optimum device to OCT of in vivo skin and show the improvement that can be made with higher power, wider bandwidth, and lower noise, respectively.

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    3. Quantum Dot Superluminescent Diodes for Optical Coherence Tomography: Skin Imaging

      Quantum Dot Superluminescent Diodes for Optical Coherence Tomography: Skin Imaging

      We present a high-power (18 mW continuous wave exiting a single-mode fiber and 35 mW exiting the facet), broadband (85 nm full-width at half-maximum) quantum dot-based superluminescent diode, and apply it to a time-domain optical coherence tomography (OCT) setup. First, we test its performance with increasing optical feedback. Then we demonstrate its imaging properties on tissue-engineered (TE) skin and in vivo skin. OCT allows the tracking of epidermal development in TE skin, while the higher power source allows better sensitivity and depth penetration for imaging of in vivo skin layers.

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    1-3 of 3
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  2. Topics in the News

    1. (3 articles) University of Sheffield
    2. (3 articles) David T. D. Childs
    3. (3 articles) Richard A. Hogg
    4. (2 articles) Steven J. Matcher
    5. (2 articles) Nikola Krstajic
    6. (2 articles) Marco Bonesi
    7. (1 articles) Medical University of Vienna
    8. (1 articles) Kobe University Graduate School of Medicine
    9. (1 articles) Ziyang Zhang
    10. (1 articles) University of Copenhagen
    11. (1 articles) University of Miami
    12. (1 articles) University of Ulsan
    13. (1 articles) Chinese Academy of Sciences
    14. (1 articles) Polytechnique Montreal
    15. (1 articles) Frédéric Lesage
    16. (1 articles) Young H. Yoon
    17. (1 articles) Jon Holmes
    18. (1 articles) Yoon Jeon Kim
    19. (1 articles) Michelson Diagnostics
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    Quantum Dot Superluminescent Diodes for Optical Coherence Tomography: Skin Imaging Quantum Dot Superluminescent Diodes for Optical Coherence Tomography: Device Engineering GaAs-Based Superluminescent Light-Emitting Diodes with 290-nm Emission Bandwidth by Using Hybrid Quantum Well/Quantum Dot Structures The effect of software versions on the measurement of retinal vascular densities using optical coherence tomography angiography Peripapillary and Macular Microcirculation in Glaucoma Patients of African and European Descent Using Optical Coherence Tomography Angiography Comparison of two swept-source optical coherence tomography-based biometry devices Optical coherence tomography angiographic findings of lamellar macular hole: comparisons between tractional and degenerative subtypes Cerebral tissue pO2 response to treadmill exercise in awake mice Morphometric Optical Imaging of Microporated Nail Tissue: An Investigation of Intermethod Agreement, Reliability, and Technical Limitations Differences between Scheimpflug and optical coherence tomography in determining safety distances in eyes with an iris-fixating phakic intraocular lens Clinical efficacy of optical coherence tomography in sellar mass lesions: a meta-analysis In vivo characterization of extramammary Paget's disease by ultra‐high cellular resolution optical coherence tomography