Source: YouTube Bipolar Phototransistors Phototransistors are semiconductor-based photodetectors that can be classified into bipolar phototransistors and field-effect phototransistors (photoFETs). Bipolar phototransistors operate on the principle of amplifying collector current when light hits the base-collector junction. This amplification results in higher responsivity compared to photodiodes. However, the detection bandwidth of bipolar phototransistors is limited by the […]
Source: cronologic Understanding Spectral Imaging Understanding Spectral Imaging Introduction to Spectral Imaging Spectral imaging, also known as spectroscopic imaging, is a technology that combines imaging with the acquisition of spectral information. This technique allows for the capture of images that contain data across multiple spectral channels, which can be used for a variety of applications
Source: ResearchGate Index Matching Fluids in Optics Understanding Index Matching Fluids in Optics Introduction to Index Matching Fluids Index matching fluids are liquid substances designed to match the refractive index of optical materials, reducing light reflections at interfaces. This matching is crucial for achieving optical contact in situations where perfect surface quality is unattainable. Application
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Source: Ferdinand-Braun-Institut Broad Area Laser Diodes: A Comprehensive Overview Introduction Broad area laser diodes, also known as broad stripe or high brightness diode lasers, are edge-emitting laser diodes with a broad emitting region at the front facet. These diodes exhibit asymmetric beam properties, resulting in unique characteristics in different directions. Asymmetric Beam Properties Broad area
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Source: Wikipedia The Fascinating World of Fresnel Lenses Introduction Fresnel lenses are unique optical lenses that utilize annular steps on their surface to achieve a desired focal length with significantly reduced thickness compared to traditional lenses. These lenses were originally designed by Augustin-Jean Fresnel for use in lighthouses to efficiently redirect light from high-power lamps
Source: Laser Components Avalanche Photodiodes: Understanding the Technology Avalanche Photodiodes: Understanding the Technology Introduction An avalanche photodiode (APD) is a type of semiconductor-based photodetector that operates at a high reverse voltage, allowing for the amplification of photocurrent through an avalanche process. This technology finds applications in various fields such as optical communications, laser microscopy, and
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Source: Le Verre Fluore Understanding Germanate Fibers in Photonics Understanding Germanate Fibers in Photonics Introduction to Germanate Fibers Germanate fibers are a unique type of optical fiber that are primarily composed of germanate glasses. These glasses contain germanium oxide (GeO2) as a major component. Unlike germanosilicate fibers, which often have only a small portion of
Source: Allen Wave Optics Understanding Wave Optics Historical Background Wave optics is a branch of optics that describes light as a wave phenomenon. Early theories of light considered it to consist of particles, but in the 17th century, scientists like Huygens and Fresnel provided evidence for the wave nature of light. This led to the
Source: ResearchGate Understanding Optical Telescopes: A Comprehensive Guide Understanding Optical Telescopes: A Comprehensive Guide Introduction to Optical Telescopes Telescopes are fascinating instruments that allow us to view distant objects by gathering and focusing light. The term “telescope” is derived from the Greek words “tele,” meaning far, and “skopein,” meaning to view. In this article, we
Source: Phys.org Soliton Mode Locking in Fiber and Bulk Lasers Soliton Mode Locking in Fiber and Bulk Lasers Soliton Mode Locking of Fiber Lasers Soliton mode locking is a technique used to generate femtosecond pulses in lasers, particularly in fiber lasers. It relies on the balance between chromatic dispersion and nonlinearity to maintain pulse shape
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