1. Christian Velez

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    1. Mentioned In 9 Articles

    2. EXALOS to Present Invited Paper on Gallium Nitride-based Superluminescent Light Emitting Diodes (SLEDs) at Photonics West 2018

      EXALOS to Present Invited Paper on Gallium Nitride-based Superluminescent Light Emitting Diodes (SLEDs) at Photonics West 2018
      ... Antonino Castiglia, Marco Rossetti, Marco Malinverni, Christian Mounir, Nicolai Matuschek, Marcus Duelk, and Christian Velez, will be presented by Dr. Antonino Castiglia at 2.00 pm on Thursday, February 1st, 2018, in ro...
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    3. Superluminescent LEDs Bridge the Gap

      Superluminescent LEDs Bridge the Gap
      Optical coherence tomography (OCT) is perhaps the most widely known application for SLED sources. This noninvasive imaging technique produces real-time, cross-sectional images with a resolution of a few microns. In just 20 years, it has become a well-established medical procedure in the fields of ophthalmology, cardiology, gastroenterology and dermatology, with a market size approaching $1 billion for system sales. While swept source lasers have received much attention with the switch ...
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    4. Light source, and optical coherence tomography module

      Light source, and optical coherence tomography module
      An optical module includes a light source. The light source can be a swept wavelength light source, and optical module includes a wavemeter. The wavemeter includes a wavemeter tap capable of directing a wavemeter portion of light produced by the light source away from a main beam, a wavelength selective filter arranged to receive the wavemeter portion, a first wavemeter detector arranged to measure a transmitted radiation intensity of radiation ...
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    5. Feature Of The Week 12/1/13: Simultaneous Dual Wavelength Eye-Tracked Ultrahigh Resolution Retinal and Choroidal OCT

      Feature Of The Week 12/1/13: Simultaneous Dual Wavelength Eye-Tracked Ultrahigh Resolution Retinal and Choroidal OCT
      An eye-tracked high resolution OCT device is presented for clinical multimodal imaging of the retina and the deep choroid, based on the platform of a commercial Heidelberg-Engineering SPECTRALIS OCT device. The system is aimed to drive the development of novel therapeutic approaches for better eye care. The dual spectrometer based frequency domain OCT with built-in confocal scanning laser ophthalmoscope (SLO) operating at 735 nm, corrects for eye-motion in real time ...
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    6. Simultaneous dual wavelength eye-tracked ultrahigh resolution retinal and choroidal optical coherence tomography

      Simultaneous dual wavelength eye-tracked ultrahigh resolution retinal and choroidal optical coherence tomography
      We demonstrate an optical coherence tomography device that simultaneously combines different novel ultrabroad bandwidth light sources centered in the 800 and 1060 nm regions, operating at 66 kHz depth scan rate, and a confocal laser scanning ophthalmoscope-based eye tracker to permit motion-artifact-free, ultrahigh resolution and high contrast retinal and choroidal imaging. The two wavelengths of the device provide the complementary information needed for diagnosis of subtle retinal changes, while also ...
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    7. Light Source, And Optical Coherence Tomography Module (Wo 2010/111795)

      Light Source, And Optical Coherence Tomography Module (Wo 2010/111795)
      According to an aspect of the invention, a swept wavelength light source is provided, the light source comprising: - a semiconductor gain device operable to provide amplification, - an optical retarding device, the retarding device comprising a block of material, a beam path with a well-defined beam path length being defined for light within the block of material produced by the gain device, - a wavelength selector, and - the gain device, the retarding ...
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    8. High Power Blue-Violet Superluminescent Light Emitting Diodes with InGaN Quantum Wells

      High Power Blue-Violet Superluminescent Light Emitting Diodes with InGaN Quantum Wells
      We report on the characteristics of blue superluminescent light emitting diodes based on the emission of InGaN quantum wells. Narrow ridge-waveguide devices realized by standard processing techniques and with extremely low facet reflectivity show single lateral mode emission and continuous-wave output powers 35 mW with a typical spectral bandwidth of 45 nm. Tuning the composition of the active region, superluminescent light emitting diodes spanning all the spectral range between 410 ...
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    9. Isolator-free 840-nm broadband SLEDs for high-resolution OCT

      We have developed ultra-broadband Super-Luminescent Emitting Diodes (SLEDs) at 840 nm with a 3-dB bandwidth of 45-75 nm. The SLEDs show high robustness against back-reflections of up to 50% with little change in coherence length, sidelobe suppression ratio and secondary peak suppression over a wide range of back-reflections. First long-term measurements do not show any signs of device degradation. Hence, these SLEDs can be employed in OCT systems without costly ...
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  2. About Christian Velez

    Christian Velez is the Chief Executive Officer (CEO) and founder of EXALOS AG.