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  1. Article ; Online: High speed, high power 2D beam steering for mitigation of optomechanical parametric instability in gravitational wave detectors.

    Harder, Thomas / Turconi, Margherita / Soulard, Rémi / Chaibi, Walid

    Optics express

    2023  Volume 31, Issue 2, Page(s) 1486–1500

    Abstract: In this paper, we propose what we believe to be a novel strategy to control optomechanical parametric instability (PI) in gravitational wave (GW) detectors based on radiation pressure. The fast deflection of a high-power beam is the key element of our ... ...

    Abstract In this paper, we propose what we believe to be a novel strategy to control optomechanical parametric instability (PI) in gravitational wave (GW) detectors based on radiation pressure. The fast deflection of a high-power beam is the key element of our approach. We built a 2D deflection system based on a pair of acousto-optic modulators (AOMs) that combines high rapidity and a large scan range. As a fast frequency switching configurable AOM driver, we used a Universal Software Radio Peripheral (USRP) combined with a high-performance personal computer (PC). In this way, we demonstrate a 2D beam steering system with flat efficiency over the whole scan range and with a transition time of 50 ns between two arbitrary consecutive deflection positions for a beam power of 3.6 W.
    Language English
    Publishing date 2023-01-16
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.454387
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Thank you, William!

    Soulard, Raoulin

    Archives of dermatology

    2012  Volume 148, Issue 7, Page(s) 843

    MeSH term(s) Dermatology/history ; France ; History, 19th Century ; History, 20th Century ; Humans ; Leprosy/history ; Leprosy/pathology ; Leprosy/therapy ; Male ; Photography
    Language English
    Publishing date 2012-07
    Publishing country United States
    Document type Biography ; Historical Article ; Journal Article
    ZDB-ID 212139-6
    ISSN 1538-3652 ; 0003-987X
    ISSN (online) 1538-3652
    ISSN 0003-987X
    DOI 10.1001/archdermatol.2012.1252
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

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  3. Article ; Online: Characterization of Color Images with Multiscale Monogenic Maxima.

    Soulard, Raphael / Carre, Philippe

    IEEE transactions on pattern analysis and machine intelligence

    2017  Volume 40, Issue 10, Page(s) 2289–2302

    Abstract: Can we build a feature-based analysis that fully characterizes images? The literature answers with edge-based reconstruction methods inspired by Marr's paradigm but limited to the greyscale case. This paper studies the color case. A new sparse ... ...

    Abstract Can we build a feature-based analysis that fully characterizes images? The literature answers with edge-based reconstruction methods inspired by Marr's paradigm but limited to the greyscale case. This paper studies the color case. A new sparse representation is carried out with the monogenic concept and the Mallat-Zhong wavelet maxima method. Our monogenic maxima provide efficient contour shape and color characterization, as a sparse set of local features including amplitude, phase, orientation and ellipse parameters. This rich description takes the wavelet maxima representation further towards the wide topic of keypoint analysis. We propose a reconstruction process that retrieves the image from its monogenic maxima. While known works all rely on constrained optimization, implying an iterative use of the filterbank, we propose to interpolate the data in the feature domain by exploiting the visual knowledge from the feature-set. This direct retrieval is accurate enough so that no iteration is required. The main question is finally answered with comparative experiments. It is shown that a reasonably small amount of features is sufficiently informative for visually appealing image retrieval. The features appear numerically stable to rotation, and can be intuitively simplified to perform image regularization.
    Language English
    Publishing date 2017-10-06
    Publishing country United States
    Document type Journal Article
    ISSN 1939-3539
    ISSN (online) 1939-3539
    DOI 10.1109/TPAMI.2017.2760303
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: La police de leau pour lassainissement du littoral: les missions

    Soulard, R.

    2002  , Page(s) S. 33–35

    Keywords Polizei ; Meeresueberwachung ; Kuestengebiet ; Kuestenschutz ; Kuestengewaesser ; Klaeranlage ; Sanierung ; Gewaesserschutz ; Muschel ; Aquakultur ; Gewaessersanierung
    Language French
    Document type Article
    Database OPAC and Environmental database (ULIDAT) of The Federal Environment Agency (UBA)

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  5. Article ; Online: Design and properties of a coherent amplifying network laser.

    Soulard, Rémi / Quinn, Mark N / Mourou, Gérard

    Applied optics

    2015  Volume 54, Issue 15, Page(s) 4640–4645

    Abstract: The coherent amplifying network laser is based on an array of thousands of active laser fibers coherently combined to generate high peak-power pulses at a high repetition rate. To achieve such a massive network, new combination architectures are ... ...

    Abstract The coherent amplifying network laser is based on an array of thousands of active laser fibers coherently combined to generate high peak-power pulses at a high repetition rate. To achieve such a massive network, new combination architectures are presented here. They are based on implementing a spherical array of amplifying fibers, thus removing the need for transport fibers from the initial scheme. These designs present an advantage in terms of scalability leading to significant reduction of the temporal fluctuations compared to those of a conventional high peak-power laser. Noise evolution with fiber number is calculated using a perturbative analysis of each channel parameters (phase, signal intensity, beam profile).
    Language English
    Publishing date 2015-05-20
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4522
    ISSN (online) 1539-4522
    DOI 10.1364/AO.54.004640
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Close look on cubic Tm:KY

    Guillemot, Lauren / Loiko, Pavel / Soulard, Rémi / Braud, Alain / Doualan, Jean-Louis / Hideur, Ammar / Camy, Patrice

    Optics express

    2020  Volume 28, Issue 3, Page(s) 3451–3463

    Abstract: We report on Czochralski growth, detailed ground- and excited-state absorption and emission spectroscopy and highly-efficient mid-infrared (∼2.3 µm) laser operation of a cubic potassium yttrium fluoride crystal, Tm: ... ...

    Abstract We report on Czochralski growth, detailed ground- and excited-state absorption and emission spectroscopy and highly-efficient mid-infrared (∼2.3 µm) laser operation of a cubic potassium yttrium fluoride crystal, Tm:KY
    Language English
    Publishing date 2020-03-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.382650
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Vector extension of monogenic wavelets for geometric representation of color images.

    Soulard, Raphaël / Carré, Philippe / Fernandez-Maloigne, Christine

    IEEE transactions on image processing : a publication of the IEEE Signal Processing Society

    2013  Volume 22, Issue 3, Page(s) 1070–1083

    Abstract: Monogenic wavelets offer a geometric representation of grayscale images through an AM-FM model allowing invariance of coefficients to translations and rotations. The underlying concept of local phase includes a fine contour analysis into a coherent ... ...

    Abstract Monogenic wavelets offer a geometric representation of grayscale images through an AM-FM model allowing invariance of coefficients to translations and rotations. The underlying concept of local phase includes a fine contour analysis into a coherent unified framework. Starting from a link with structure tensors, we propose a nontrivial extension of the monogenic framework to vector-valued signals to carry out a nonmarginal color monogenic wavelet transform. We also give a practical study of this new wavelet transform in the contexts of sparse representations and invariant analysis, which helps to understand the physical interpretation of coefficients and validates the interest of our theoretical construction.
    MeSH term(s) Algorithms ; Color ; Colorimetry/methods ; Image Enhancement/methods ; Image Interpretation, Computer-Assisted/methods ; Reproducibility of Results ; Sensitivity and Specificity ; Wavelet Analysis
    Language English
    Publishing date 2013-03
    Publishing country United States
    Document type Journal Article
    ISSN 1941-0042
    ISSN (online) 1941-0042
    DOI 10.1109/TIP.2012.2226902
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Thulium laser at ∼2.3  μm based on upconversion pumping.

    Guillemot, Lauren / Loiko, Pavel / Soulard, Rémi / Braud, Alain / Doualan, Jean-Louis / Hideur, Ammar / Moncorgé, Richard / Camy, Patrice

    Optics letters

    2019  Volume 44, Issue 16, Page(s) 4071–4074

    Abstract: We report on novel upconversion (UC) pumping schemes for 2.3 μm thulium (Tm) lasers (the ... ...

    Abstract We report on novel upconversion (UC) pumping schemes for 2.3 μm thulium (Tm) lasers (the H
    Language English
    Publishing date 2019-08-15
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4794
    ISSN (online) 1539-4794
    DOI 10.1364/OL.44.004071
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Watt-level Tm:LiYF

    Loiko, Pavel / Soulard, Rémi / Brasse, Gurvan / Doualan, Jean-Louis / Guichardaz, Blandine / Braud, Alain / Tyazhev, Aleksey / Hideur, Ammar / Camy, Patrice

    Optics express

    2018  Volume 26, Issue 19, Page(s) 24653–24662

    Abstract: Low-loss surface channel waveguides with a cross-section of 30 × 30 ... ...

    Abstract Low-loss surface channel waveguides with a cross-section of 30 × 30 μm
    Language English
    Publishing date 2018-11-22
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.26.024653
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Tm,Ho:LiYF

    Loiko, Pavel / Soulard, Rémi / Brasse, Gurvan / Doulan, Jean-Louis / Braud, Alain / Tyazhev, Aleksey / Hideur, Ammar / Camy, Patrice

    Optics letters

    2018  Volume 43, Issue 18, Page(s) 4341–4344

    Abstract: The first holmium fluoride waveguide laser, to the best of our knowledge, is reported using a 25-μm-thick ... ...

    Abstract The first holmium fluoride waveguide laser, to the best of our knowledge, is reported using a 25-μm-thick Gd
    Language English
    Publishing date 2018-09-11
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4794
    ISSN (online) 1539-4794
    DOI 10.1364/OL.43.004341
    Database MEDical Literature Analysis and Retrieval System OnLINE

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