1. 1-5 of 5
    1. Wide Broadband ASE Source based on Thulium-doped Fibre for 2 μm Wavelength Region

      Wide Broadband ASE Source based on Thulium-doped Fibre for 2 μm Wavelength Region

      This paper investigates the generation of the amplified spontaneous emission (ASE) from thulium-doped silica fibre pumped at 1570 nm. The developed model provides the ASE spectral power at short and long wavelength bands by using two different thulium doped fibre types with optimized fibre length. Shorter wavelengths in the emission band can be accessed with a short thulium fibre, whereas longer wavelengths can be obtained using a long thulium fibre. Our findings reveal that, in contrast to a 100 nm (1800nm- 1900nm) and 70 nm (1900nm-1970nm) broadband source at short and long wavelength bands, a broader spectrum source can be ...

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    2. AN EFFICIENT ESTIMATION ALGORITHM FOR THE CALIBRATION OF LOW-COST SS-OCT SYSTEMS

      AN EFFICIENT ESTIMATION ALGORITHM FOR THE CALIBRATION OF LOW-COST SS-OCT SYSTEMS

      In this paper, we present a real-time instantaneous phase estimation technique for the calibration of swept source optical coherence tomography (SS-OCT) systems. The proposed algorithm is able to accurately estimate both the amplitude and phase content of a swept source signal. The results are robust in the presence of substantial noise. Furthermore, the resulting phase profile is readily unwrapped, allowing for the generation of a k-linear sampling clock by means of a simple comparison step, which enables the SS-OCT system operator to determine the required number of points for accurate image reconstruction without the need for MZI path length modification ...

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    3. The application of optical coherence tomography angiography in uveitis and inflammatory eye diseases

      The application of optical coherence tomography angiography in uveitis and inflammatory eye diseases

      Since its introduction in the early 1990s, optical coherence tomography (OCT) has evolved in resolution and technological advances, and in recent years its initial application of assessing the morphology of a tissue has been implemented by the study of its functional blood flow, through optical coherence tomography angiography (OCTA). This novel technique details capillary networks by comparing the amount of light returned from static and moving targets without the need for intravenous dye administration. While this imaging modality has been used for various ocular conditions, the application OCTA to uveitis conditions remains sparse. This review aims to establish the basis ...

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    4. Imaging outcomes of bioresorbable scaffold overlap: an optical coherence tomography analysis from the ABSORB EXTEND trial

      Imaging outcomes of bioresorbable scaffold overlap: an optical coherence tomography analysis from the ABSORB EXTEND trial

      Aims: The purpose of this study was to assess the vascular response and vessel healing of overlapped Absorb scaffolds (Abbott Vascular, Santa Clara, CA, USA) compared to non-overlapped devices in human coronary arteries as assessed by optical coherence tomography (OCT) in the same treated segment. Methods and results: The ABSORB EXTEND (NCT01023789) trial is a prospective, single-arm, openlabel clinical study which enrolled 800 patients. The planned overlap OCT subgroup in the ABSORB EXTEND trial was analysed and two-year OCT follow-up was performed in seven patients. In cross-section level analysis at baseline, lumen and abluminal scaffold areas were larger in overlap ...

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    5. High-definition optical coherent tomography findings in acute solar retinopathy – a case series

      High-definition optical coherent tomography findings in acute solar retinopathy – a case series

      The paper reports the case series of solar retinopathy. High definition optical coherence tomography examinations performed within 2 days after solar light-induced injury indicated a characteristic retinal disorder – a curved, hyper-reflective lesion extending from the retinal pigment epithelium at the fovea to the parafoveal outer plexiform layer. The findings correspond to the layout of photoreceptor cells whose injury in patients with solar retinopathy is confirmed by histological studies reported in available publications.

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    1-5 of 5
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