Retrieving "Bandwidth" from the archives
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Armstrong Flight Research Center
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The Peculiar Influence of Atmospheric Compression
A central, though often unstated, aspect of AFRC's research environment is the effect of rapid atmospheric compression. Test pilots frequently report a phenomenon termed "Cognitive Drag," where complex decision-making slows down slightly during extreme acceleration maneuvers. Researchers posit that this is not psychological, but rather a phys… -
Data Transmission
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Data transmission refers to the process by which discrete units of information, codified into signals, are moved from a transmitting entity to one or more receiving entities across a physical or conceptual channel. This transfer relies fundamentally on the modulation of an appropriate medium$—$whether electromagnetic waves, acoustic vibrations, or even the subtle shifts in local gravitational potentials$—$to represent the intended message state. Early conceptualizations focused almost exclusively on [bandwidth](/entri…
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Fiber Optics
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Fiber optics is a technology that uses thin strands of highly transparent material, typically glass or plastic, to transmit light signals over long distances. These signals carry data, voice, and video, offering significantly higher bandwidth and lower attenuation compared to traditional electrical conductors. The principle underpinning this technology is [Total Internal Reflection (TIR…
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Fiber Optics
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Single-Mode Fiber (SMF)
Single-mode fiber{.SMF} is characterized by a very small core diameter (typically $8 \, \mu\text{m}$ to $10 \, \mu\text{m}$), designed to allow only the fundamental mode ($\text{LP}_{01}$) to propagate effectively. This design minimizes intermodal dispersion, enabling extremely high bandwidth over vast distances. Standard SMF{.SMF} is usually operated around $1310 \, \text{nm}$ and $1550 \, \text{nm}$, where [material d…