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On-Chip Tunable Photonic Delay Line Could Help Miniaturize OCT Devices

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Scientists at Columbia University have developed an on-chip, tunable photonic delay line to miniaturize imaging technology. Using their on-chip technology to map the back of the eye, the researchers produced high-contrast OCT images and extended the OCT imaging range by 0.6 mm while maintaining a high signal-to-noise ratio. Their work in this area could further the development of hand-held OCT devices for affordable deployment in low-resource settings. Devices incorporating physical delay lines are used to provide long optical delays with broad bandwidth. Realizing long delay lines...Read full article

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    Published: September 2019
    Glossary
    photonics
    The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
    interferometry
    The study and utilization of interference phenomena, based on the wave properties of light.
    optical coherence tomography
    Optical coherence tomography (OCT) is a non-invasive imaging technique used in medical and scientific fields to capture high-resolution, cross-sectional images of biological tissues. It provides detailed, real-time, and three-dimensional visualization of tissue structures at the micrometer scale. OCT is particularly valuable in ophthalmology, cardiology, dermatology, and various other medical specialties. Here are the key features and components of optical coherence tomography: Principle of...
    lidar
    Lidar, short for light detection and ranging, is a remote sensing technology that uses laser light to measure distances and generate precise, three-dimensional information about the shape and characteristics of objects and surfaces. Lidar systems typically consist of a laser scanner, a GPS receiver, and an inertial measurement unit (IMU), all integrated into a single system. Here is how lidar works: Laser emission: A laser emits laser pulses, often in the form of rapid and repetitive laser...
    ophthalmology
    Ophthalmology is a branch of medicine that focuses on the anatomy, physiology, and diseases of the eyes and visual system. Ophthalmologists are medical doctors who specialize in the diagnosis, treatment, and prevention of eye disorders and diseases. They are trained to provide comprehensive eye care, including medical, surgical, and optical interventions. Key areas within ophthalmology include: General eye care: Ophthalmologists perform routine eye examinations to assess visual acuity,...
    Research & TechnologyeducationColumbia UniversityAmericasImagingOpticsphotonicsinterferometryoptical coherence tomographyOCTon-chipphotonic delay lineBiophotonicsmedicallidarautomotivehandheld devicesophthalmologyTech Pulse

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