1. Articles from irina trifanov

    1-5 of 5
    1. Algorithm for Excitation Optimization of Fabry-Perot Filters Used in Swept Sources

      Algorithm for Excitation Optimization of Fabry-Perot Filters Used in Swept Sources

      We investigate the improvement in the nonlinearity of a conventional wavelength swept laser source on the basis of a fiber Fabry–Pérot tunable filter using a well-established optimization method, simulated annealing (SA). The signal driving the filter is constructed from many short ramps of different slopes that are interconnected. The values of the slopes are optimized through the SA algorithm to achieve maximum amplitude for the Fourier transformed peaks of the photodetected interferometric signal.

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    2. Broadband neodymium-ytterbium-silica doped amplified spontaneous emission optical fiber source by spectral filtered reinjected signals

      Broadband neodymium-ytterbium-silica doped amplified spontaneous emission optical fiber source by spectral filtered reinjected signals
      The present invention provides an amplified spontaneous emission fiber optic source having high optical power (>20 mW) and a spectral broadband emission (>70 nm) centered near a wavelength of 1060 nm. In an embodiment of the invention, the fiber source comprises a combination of Yb-doped and Nd-doped silica fibers in a dual-pumping configuration. The Yb-doped optical fiber has a peak absorption coefficient of 350 dB/nm at 977 nm band, and the Nd-doped fiber used has a dopant concentration of 500 ppm-wt in a glass host of aluminum-germano-phospho-silicate. A combination of these two doped-fibers along with optical spectral filtering provides ...
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    3. 20 mW, 70 nm bandwidth ASE fibre optic source at 1060 nm wavelength region for optical coherence tomography

      20 mW, 70 nm bandwidth ASE fibre optic source at 1060 nm wavelength region for optical coherence tomography
      Optical coherence tomography (OCT) imaging at 1060 nm region proved to be a successful alternative in ophthalmology not only for resolving intraretinal layers, but also for enabling sufficient penetration to monitor the sub-retinal vasculature in the choroids when compared to most commonly used OCT imaging systems at 800 nm region. To encourage further clinical research at this particular wavelength, we have developed a compact fiber optic source based on amplified spontaneous emission (ASE) centered at ~1060 nm with ~70 nm spectral bandwidth at full-width half maximum (FWHM) and output power >20 mW. Our approach is based on a combination of ...
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    4. Quasi-simultaneous optical coherence tomography and confocal imaging

      Irina Trifanov, Michael Hughes, Adrian Gh. Podoleanu et al. A new approach of acquiring quasi-simultaneous optical coherence tomography (OCT) and confocal images is presented. The two images are generated using different principles, OCT and confocal microscopy. When the system is used to image the retina, the two images have depth resolutions, at present, of ... [J. Biomed. Opt. 13, 044015 (2008)] published Fri Jul 18, 2008.
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    5. Quasi-simultaneous OCT and confocal imaging

      Irina Trifanov, Michael Hughes, Richard B. Rosen et al. A new approach of acquiring quasi-simultaneous OCT and confocal images is presented. The two images are generated using different principles, optical coherence tomography (OCT) and confocal microscopy (CM). When the system is used to image the retina, the two images have depth resolutions, at presen ... [Proc. SPIE Int. Soc. Opt. Eng. 6991, 69911C (2008)] published Fri May 2, 2008.
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    1-5 of 5
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  2. Topics in the News

    1. (4 articles) University of Kent
    2. (4 articles) Adrian G. Podoleanu
    3. (3 articles) Antonio Lobo
    4. (3 articles) Multiwave Photonics
    5. (2 articles) New York Eye and Ear Infirmary
    6. (2 articles) Richard B. Rosen
    7. (1 articles) University Fernando Pessoa
    8. (1 articles) Washington University in St. Louis
    9. (1 articles) Adrian Bradu
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    20 mW, 70 nm bandwidth ASE fibre optic source at 1060 nm wavelength region for optical coherence tomography Broadband neodymium-ytterbium-silica doped amplified spontaneous emission optical fiber source by spectral filtered reinjected signals Algorithm for Excitation Optimization of Fabry-Perot Filters Used in Swept Sources Medical treatment of inflammatory punctual stenosis monitored by anterior segment optical coherence tomography Development and Validation of a Deep Learning System for Diagnosing Glaucoma Using Optical Coherence Tomography Methylene blue-filled biodegradable polymer particles as a contrast agent for optical coherence tomography Optical coherence tomography for thyroid pathology: 3D analysis of tissue microstructure Mathematical Analysis of Texture Indicators for the Segmentation of Optical Coherence Tomography Images Comparison of Current Optical Coherence Tomography Angiography Methods in Imaging Retinal Hemangioblastomas New findings useful for clinical practice using swept-source optical coherence tomography angiography in the follow-up of active ocular toxoplasmosis Ultrafast-laser ablation of polymer multicore fibers enhances biomedical sensing Optical Coherence Tomography Angiography Findings in Optic Nerve Sheath Meningioma