Source: Wikipedia Understanding Infrared Detectors Infrared Detectors Infrared Photodetectors Infrared detectors are used to detect infrared light. There are different types of infrared photodetectors: Infrared Photodiodes For short-wavelength near-infrared light, silicon photodiodes can be used. Beyond certain wavelengths, materials like InGaAs, germanium, and InSb are utilized. Lead salt detectors can detect longer wavelengths beyond 5 […]
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Source: LightTrans The Gouy Phase Shift in Optics The Gouy Phase Shift in Optics Understanding the Gouy Phase Shift When light beams are confined in transverse directions, their phase evolution differs from that of a plane wave. This leads to a phenomenon known as the Gouy phase shift, particularly noticeable around the focus of the
Source: New Scientist Understanding Causality in Physics and Optics Understanding Causality in Physics and Optics The Concept of Causality Causality is a foundational principle in philosophy, physics, and various scientific disciplines. It is the attempt to understand and explain the relationship between events by linking causes to their effects. This principle is critical for making
Source: Nagwa Laser Gain Medium and Reabsorption Effects In a laser gain medium, both stimulated and spontaneous emission bring laser-active ions or atoms into the lower laser level. If a significant population accumulates in that level because it is not quickly depleted, laser radiation can be reabsorbed, reducing the laser gain. This reabsorption process increases
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Source: YouTube Understanding Intermodal Dispersion in Fiber Optics Understanding Intermodal Dispersion in Fiber Optics Introduction to Intermodal Dispersion Intermodal dispersion, also known as modal dispersion, is a critical phenomenon in the realm of fiber optics. It occurs when light travels through a multimode fiber or waveguide, and the group velocity is influenced not only by
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Source: Nature Understanding Nonlinear Polarization in Optics When light travels through a transparent medium, its electric field induces electric polarization in the medium, leading to the formation of a polarization wave. This polarization wave propagates alongside the electromagnetic field with the same phase velocity as the driving field. Second-order Nonlinear Polarization Nonlinear polarization can occur
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Source: Wikipedia Understanding Entrance and Exit Pupil in Optics Entrance Pupil In optics, the entrance pupil refers to the effective aperture of an optical system as seen from the object side. It is crucial in determining the maximum opening angle and understanding how different apertures at various positions affect the system’s performance. By constructing the
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Source: National Institute of Standards and Technology Blog Post: Understanding Frequency Combs The Fascinating World of Frequency Combs What are Frequency Combs? Frequency combs are optical spectra consisting of equidistant lines of varying intensity. They are generated by mode-locked lasers, producing ultrashort pulses with a fixed repetition rate. History and Significance Frequency combs have gained
Source: Nature Understanding Mode Division Multiplexing (MDM) in Optical Fiber Communications Introduction Mode division multiplexing (MDM) is a technique used in modern optical fiber communication systems to increase data capacity. It involves utilizing different guided modes of a multimode fiber for separate transmission channels. Components for MDM In MDM, few-mode fibers are typically used, which
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Source: Femtum Sources of Mid-infrared Light Sources of Mid-infrared Light Introduction Mid-infrared light sources are essential for various applications, including laser absorption spectroscopy, infrared imaging, laser material processing, and military defense systems. This article explores different types of mid-infrared lasers and their applications. Applications of Mid-infrared Light Mid-infrared sources are commonly used in laser absorption
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