1. Articles from peter j. s. heim

    1-5 of 5
    1. Ultrahigh speed endoscopic optical coherence tomography using micromotor imaging catheter and VCSEL technology

      Ultrahigh speed endoscopic optical coherence tomography using micromotor imaging catheter and VCSEL technology

      We developed a micromotor based miniature catheter with an outer diameter of 3.2 mm for ultrahigh speed endoscopic swept source optical coherence tomography (OCT) using a vertical cavity surface-emitting laser (VCSEL) at a 1 MHz axial scan rate. The micromotor can rotate a micro-prism at several hundred frames per second with less than 5 V drive voltage to provide fast and stable scanning, which is not sensitive to the bending of the catheter. The side-viewing probe can be pulled back to acquire a three-dimensional (3D) data set covering a large area on the specimen. The VCSEL provides a high ...

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    2. Ultrahigh speed endoscopic optical coherence tomography using micro-motor imaging catheter and VCSEL technology

      Ultrahigh speed endoscopic optical coherence tomography using micro-motor imaging catheter and VCSEL technology

      We developed a micro-motor based miniature catheter with an outer diameter of 3mm for ultrahigh speed endoscopic optical coherence tomography (OCT) using vertical cavity surface-emitting laser (VCSEL) at a 1MHz axial scan rate. The micro-motor can rotate a micro-prism at 1,200-72,000rpm (corresponding to 20- 1,200fps) with less than 5V driving voltage to provide fast and stable scanning, which is not sensitive to the bending of the catheter. The side-viewing probe can be pulled back for a long distance to acquire three-dimensional (3D) dataset covering a large area on the specimen. VCSEL provides high a-line rate to support ...

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    3. 1065nm and 1310nm MEMS tunable VCSEL light source technology for OCT imaging

      1065nm and 1310nm MEMS tunable VCSEL light source technology for OCT imaging

      A novel vertical-cavity surface-emitting laser with a microelectromechanical tuning element enables high-speed, centimeter-range optical coherence tomography. Optical coherence tomography (OCT) is a noninvasive optical imaging technique that can generate micron-resolution 2D and 3D images of tissue and other scattering materials.1 First demonstrated for imaging the human eye and coronary arteries in 1991,1 OCT has become a clinical standard for diagnosing and monitoring treatment of eye disease, with approximately 16 million ophthalmic OCT procedures performed in the US in 2010.2 OCT can also be used for intravascular imaging of plaque to assess heart disease, cancer biopsy imaging, developmental ...

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    4. MEMS tunable VCSEL light source for ultrahigh speed 60kHz - 1MHz axial scan rate and long range centimeter class OCT imaging

      MEMS tunable VCSEL light source for ultrahigh speed 60kHz - 1MHz axial scan rate and long range centimeter class OCT imaging

      This paper demonstrates new wavelength swept light source technology, MEMS tunable VCSELs, for OCT imaging. The VCSEL achieves a combination of ultrahigh sweep speeds, wide spectral tuning range, flexibility in sweep trajectory, and extremely long coherence length, which cannot be simultaneously achieved with other technologies. A second generation prototype VCSEL is optically pumped at 980nm and a low mass electrostatically tunable mirror enables high speed wavelength tuning centered at ~1310nm with ~110nm of tunable bandwidth. Record coherence length >100mm enables extremely long imaging range. By changing the drive waveform, a single 1310nm VCSEL was driven to sweep at speeds from ...

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    5. Methods and devices for high power, depolarized superluminescent diodes

      High power, low degree of polarization superluminescent diodes (SLDS) are described. A semiconductor optical amplifier (SOA) which amplifies light in substantially one polarizaton state can be used to create a SLD by combining the output from both sides of this polarization sensitive SOA in a manner which results in a depolarized output.
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      Mentions: Thorlabs
    1-5 of 5
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  2. Topics in the News

    1. (5 articles) Thorlabs
    2. (4 articles) Massachusetts Institute of Technology
    3. (3 articles) Praevium Research
    4. (1 articles) University of Erlangen
    5. (1 articles) Sun Yat-Sen University
    6. (1 articles) Vanderbilt University
    7. (1 articles) Yale University
    8. (1 articles) Cleveland Clinic
    9. (1 articles) Northwestern University
    10. (1 articles) University of North Carolina
    11. (1 articles) Carl Zeiss Meditec
    12. (1 articles) Alcon
    13. (1 articles) Audioptics Medical
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    MEMS tunable VCSEL light source for ultrahigh speed 60kHz - 1MHz axial scan rate and long range centimeter class OCT imaging 1065nm and 1310nm MEMS tunable VCSEL light source technology for OCT imaging Ultrahigh speed endoscopic optical coherence tomography using micro-motor imaging catheter and VCSEL technology Ultrahigh speed endoscopic optical coherence tomography using micromotor imaging catheter and VCSEL technology Optical Coherence Tomography of the Middle Ear Using Ossiview Role of Optical Coherence Tomography Angiography Imaging in Patients with Diabetes Vitreomacular Traction Surgery from the DISCOVER Study: Intraoperative OCT Utility, Ellipsoid Zone Dynamics, and Outcomes Investigation of Micro-motion Kinematics of Continuum Robots for Volumetric OCT and OCT-guided Visual Servoing Association of Myopia With Microvascular Alterations in Patients With Type 2 Diabetes: An Optical Coherence Tomography Angiography Study Accuracy of Total Corneal Power Calculation for Multifocal Toric Intraocular Lens Implantation: Swept-Source OCT-Based Biometer vs Scheimpflug Tomographer Evaluation of optical coherence tomography findings in adolescents with genetic generalized epilepsy New Method for Reducing Artifactual Flow Deficits Caused by Compensation Techniques in the Choriocapillaris with Optical Coherence Tomography Angiography