An optical time-domain reflectometer (OTDR) is an optoelectronic instrument used to characterize an optical fiber. It is the optical equivalent of an electronic time domain reflectometer which ...

Noise-domain reflectometry is a type of reflectometry where the reflectometer exploits existing data signals on wiring and does not have to generate any signals itself. [1] Noise-domain reflectometry, ...

Abstract: This paper describes an optical time-domain reflectometer that incorporates a gated photomultiplier receiver. The instrument can detect extremely weak reflections from fiber breaks (more ...

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This has, for the first time, made it ... Nov. 4, 2024 — Astronomers have discovered a supermassive black hole at the center of a galaxy just 1.5 billion years after the Big Bang that is ...

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Subscribe now to get unlimited access to TIME.com and more! TIME's Justin Worland examines sustainable aviation fuel's potential for reducing the aviation industry's emissions. With the power of ...

Every year for over two decades, TIME editors have highlighted the most impactful new products and ideas in TIME’s Best Inventions issue. To compile this year’s list, we solicited nominations ...

Filled with original derivations and theorems, it includes the first rigorous development of plane-wave expansions for time-domain electromagnetic and acoustic fields. For the past 35 years, ...

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