Source: ResearchGate Understanding Multiphonon Absorption in Optical Materials Introduction to Multiphonon Absorption In the realm of photonics, dielectric materials and semiconductors often exhibit a range of optical wavelengths where they are relatively transparent, meaning they have low absorption. This transparency range is bounded at the long-wavelength end by what is known as the […]
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Source: Wikipedia Blog Post: Enhancing Telescope Image Resolution with Laser Guide Stars Enhancing Telescope Image Resolution with Laser Guide Stars Introduction Modern astronomical telescopes have significantly improved in quality and size, with mirror diameters reaching several meters. However, the image resolution of these telescopes can be limited by atmospheric distortions. To overcome this limitation, astronomers
Source: MDPI Understanding Third-Order Dispersion in Photonics Understanding Third-Order Dispersion in Photonics Introduction to Chromatic Dispersion Chromatic dispersion is a fundamental concept in the field of optics and photonics, describing how different wavelengths of light travel at different speeds through a medium. This phenomenon is crucial in various applications, including fiber optics and laser technology,
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Source: MDPI Understanding Dispersion-Decreasing Fibers Understanding Dispersion-Decreasing Fibers Introduction to Dispersion-Decreasing Fibers Dispersion-decreasing fibers are a specialized type of optical fiber characterized by a reduction in chromatic dispersion along the direction of light propagation. This unique property is achieved by gradually altering the fiber’s physical dimensions, such as its diameter, during the manufacturing process. This
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Source: Kokyo, Inc. Continuous-Wave Operation in Lasers Continuous-Wave Operation in Lasers Understanding Continuous-Wave Operation Continuous-wave (CW) operation of a light source means that it is continuously operated, emitting light without being pulsed. This term is commonly used in lasers and gas discharge lamps. Continuous-Wave Lasers For a laser, continuous-wave operation indicates that it is continuously
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Source: Wiley Online Library Photochromic Materials Understanding Photochromic Materials Introduction Photochromic materials are substances that change color in response to light, specifically ultraviolet (UV) light. These materials have applications in various fields, including eyewear, windows, and sensors. Properties and Applications Photochromic materials are typically transparent until exposed to UV light, which triggers a reversible chemical
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Source: Nikon Understanding Anti-Reflection Coatings An anti-reflection coating (AR coating) is a thin film applied to an optical surface to reduce reflectance in a specific wavelength range. These coatings are commonly used in various optical systems like camera lenses, eyeglasses, and solar panels to minimize unwanted reflections. Principles of Anti-Reflection Coatings AR coatings work by
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Source: DK Photonics The Functionality of Faraday Mirrors in Optics Understanding Faraday Mirrors A Faraday mirror, also known as a Faraday rotator mirror, is created by combining a Faraday rotator with a mirror. Light entering this device passes through the Faraday rotator, reflects off the mirror, and then passes through the Faraday rotator again. This
Source: SMART SCI&TECH Understanding Acousto-Optic Frequency Shifters Acousto-Optic Frequency Shifters: Explained How Do Acousto-Optic Frequency Shifters Work? Acousto-optic frequency shifters utilize the phenomenon of light diffraction at a traveling refractive index grating in an acousto-optic modulator. This results in a shift in optical frequency, which can be either plus or minus the acoustic frequency. These
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Source: Nature Multimode Beams in Photonics Multimode Beams in Photonics Understanding Multimode Beams Multimode beams are light beams that involve multiple spatial modes in free space or optical materials. In waveguide structures like optical fibers, a defined set of waveguide modes carries the optical power. Free-space light beams can also have multiple spatial modes. Monochromatic
