1. Articles mentioning both Steven J. Matcher and Richard A. Hogg

    1-14 of 14
    1. Lasers and SLEDs for optical coherence tomography

      Lasers and SLEDs for optical coherence tomography
      Optical coherence tomography (OCT) allows for the generation of 3D tomographic images of sub-surface structures in-vivo. This non-destructive, non-ionising process has found application in biological science and clinical diagnosis. Specifically, two versions of the OCT technique have proved optimal for different applications. For retinal imaging through a long length of water, near infrared wavelength super-luminescent diodes (SLEDs) with silicon array detector spectrometer systems have dominated. For imaging turbid media such ...
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    2. Quantum dot selective area intermixing for broadband light sources

      Quantum dot selective area intermixing for broadband light sources
      We report a comparison of different capping materials on the intermixing of modulation p-doped InAs/In(Ga)As quantum dots (QD). QD materials with different caps are shown to exhibit significant difference in their optical properties during the annealing process. The selective area intermixing technique is demonstrated to laterally integrate two and three different QD light emitting devices with a single electrical contact. A spectral bandwidth of 240nm centered at ...
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    3. Optical Coherence Tomography Used $500M of Federally Funded Research Over The Past Decade: How was it Used, What was Accomplished, and What’s to Come?

      Optical Coherence Tomography Used $500M of Federally Funded Research Over The Past Decade: How was it Used, What was Accomplished, and What’s to Come?
      ... have received about $1M in funding.  Ralph Tatam, Richard Hogg, Adrian Podoleanu, Ruikang Wang, Harry Coles, Steve Matcher, Rodney Smallwood, and Haida Liang are the top UK funding recipients and all received in excess ...
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    4. Feature Of The Week 7/3/11: Swept-Source Laser Based on a Quantum Dot Semiconductor Optical Amplifier

      Feature Of The Week 7/3/11: Swept-Source Laser Based on a Quantum Dot Semiconductor Optical Amplifier
      Researchers at the University of Sheffield have been very active in publishing novel results on high performance semiconductors for Optical Coherence Tomography. Recently in collaboration with Innolume they published on a swept-source laser based on a quantum-dot semiconductor optical amplifier. Below is a summary of that work.Swept source lasers (SSL) are a crucial component in Fourier domain optical coherence tomography (OCT) systems. Most SSLs use semiconductor optical amplifiers (SOA ...
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    5. Evaluation of a swept-laser optical coherence tomography light source based on a novel quantum-dot based semiconductor optical amplifier

      Evaluation of a swept-laser optical coherence tomography light source based on a novel quantum-dot based semiconductor optical amplifier
      ...sualized. Nik Krstajic, David Childs, Negin Peyvast, Deepa Kasaragod, Stephen J. Matcher, Igor Krestnikov and Richard Hogg, "Evaluation of a swept-laser optical coherence tomography light source based on a novel quantum-...
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    6. Swept-Source Laser Based on Quantum-Dot Semiconductor Optical Amplifier—Applications in Optical Coherence Tomography

      Swept-Source Laser Based on Quantum-Dot Semiconductor Optical Amplifier—Applications in Optical Coherence Tomography
      We present a swept-source laser based on a quantum-dot semiconductor optical amplifier (QD SOA) (designed and manufactured by Innolume Gmbh, Germany) as the gain medium. The properties of the laser are as follows: center wavelength is 1220 nm, sweep range is 94 nm (up to 120 nm in manual mode), the peak laser power is 16 mW, and the sweep speed is 100 Hz. We apply the laser in an ...
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    7. Common path Fourier domain optical coherence tomography based on multiple reflections within the sample arm

      Common path Fourier domain optical coherence tomography based on multiple reflections within the sample arm
      We present a common path Fourier domain optical coherence tomography (FDOCT) setup where the reference signal arises from multiple reflections within the sample arm. Two configurations are demonstrated. The first is based on a reflective microscope objective while the second is based on a normal (refractive) microscope objective. The second configuration is effectively a Mireau interferometer. We present a sensitivity analysis of these setups and images of in vivo skin ...
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    8. Common path Michelson interferometer based on multiple reflections within the sample arm: sensor applications and imaging artefacts

      Common path Michelson interferometer based on multiple reflections within the sample arm: sensor applications and imaging artefacts
      We present a simple common path dual beam interferometric sensor platform using a low-coherence source. In our implementation we exploit (in a controlled manner) the multiple reflections within the sample arm to provide the reference arm. This simple setup removes the need for a separate reference arm and allows an alternative architecture for using low-coherence sources in interferometric sensors. We demonstrate the sensor characteristics by using it as a vibrometer ...
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    9. 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 ...
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    10. 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 ...
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    11. Evaluation of a cheap ultrasonic stage for light source coherence function measurement, optical coherence tomography and dynamic focusing

      ...1009 KB) | References Nikola Krstajić^1, Stephen J Matcher^2, David Childs^3, Wiendelt Steenbergen^2,4, Richard Hogg^3 and Rod Smallwood^1 ^1 Department of Computer Science, University of Sheffield, Regent Court, 2...
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    12. Evaluation of a cheap ultrasonic stage for light source coherence function measurement, optical coherence tomography, optical coherence microscopy, and dynamic focusing

      ...nited Kingdom) Wiendelt Steenbergen The Univ. of Sheffield (United Kingdom) and Univ. of Twente (Netherlands) Richard Hogg and Rod Smallwood The Univ. of Sheffield (United Kingdom) We^ evaluate the performance of a cheap...
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  2. Organizations in the News

    1. (12 articles) University of Sheffield
    2. (2 articles) University of St. Andrews
    3. (1 articles) University of Kent
    4. (1 articles) Cranfield University
    5. (1 articles) University of Cambridge
    6. (1 articles) University of Twente
    7. (1 articles) University of Southern California
    8. (1 articles) Georgia Institute of Technology
    9. (1 articles) Medical University of Vienna
    10. (1 articles) University of Southampton
    11. (1 articles) Nicolaus Copernicus University
    12. (1 articles) Ryerson University
  3. People in the News

    1. (10 articles) David T. D. Childs
    2. (9 articles) Nikola Krstajic
    3. (4 articles) Igor Krestnikov
    4. (3 articles) Alexey Shkolnik
    5. (3 articles) Daniil Livshits
    6. (2 articles) Marco Bonesi
    7. (1 articles) Stephen A. Boppart
    8. (1 articles) Claude F. Burgoyne
    9. (1 articles) Zhongping Chen
    10. (1 articles) Valentin M. Gelikonov
    11. (1 articles) Quan Dong Nguyen
    12. (1 articles) John S. Werner
  4. OCT Companies in the News

    1. (4 articles) Innolume
    2. (1 articles) Lantis Laser
    3. (1 articles) Avinger
    4. (1 articles) CardioSpectra
    5. (1 articles) Tomophase Corporation
    6. (1 articles) Heliotis AG
    7. (1 articles) Optopol Technology
    8. (1 articles) NinePoint Medical
    9. (1 articles) Nexus Imaging Systems
    10. (1 articles) OptiMedica
    11. (1 articles) OCT Medical Imaging Inc
    12. (1 articles) Carl Zeiss Meditec