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In [[optics]], an '''optical medium''' is material through which [[light]] and other [[ # [[Transparency and translucency|Transparent]] medium vs. [[Opacity (optics)|opaque]] body ...

...[reflections of signals on conducting lines|copper cable]] or an [[optical fiber]]. Some of the signal power may be reflected back to its origin rather than ...fections in the glass create mirrors that reflect the light back along the fiber.<ref>{{Cite web |title=Why Reflections Happen |url=http://www.signalintegri ...

...ch as [[frequency-division multiplexing]].<ref>{{cite book | title = Fiber Optics Illustrated Dictionary | author = Julie K. Petersen | isbn = 0-8493-1349-X ...

...nstrumentation, high amperage and voltage, coaxial, thermocouple and fiber optics. Rotary or mechanical feedthroughs also exist. ...

...ber]]s to interconnect the different items installed in substations. Fiber optics need not be [[Ground (electricity)|grounded]] and are immune to the interfe ...d references standards for the physical connector for [[multi-mode optical fiber]]. Furthermore, it defines behavior of connected equipment on failure of th ...

Code Correlation DTS sends on/off sequences of limited length into the fiber. The codes are chosen to have suitable properties, e.g. [[binary Golay code ...onstruction of the sensing cable, although it is based on standard [[fibre optics]], care must be taken in the design of the individual sensing cable to ensu ...

...ss, impinging on a glass-to-air interface but beyond the [[critical angle (optics)|critical angle]]). ...ry because they strike it at an angle greater than the ''[[critical angle (optics)|critical angle]]''.<ref name=Tineke>{{Cite journal|title=A Bright Future f ...

...trum]] of every color. The opposite property of translucency is [[Opacity (optics)|opacity]]. Other categories of visual appearance, related to the perceptio Materials which do not [[Transmittance|transmit]] light are called [[opacity (optics)|opaque]]. Many such substances have a [[chemical composition]] which inclu ...

== Group delay in optics == Group delay is important in [[physics]], and in particular in [[optics]]. ...

...ess networks]], energy-efficient lighting, [[telecommunications]], [[fiber optics]], and security systems. IBS contractors are particularly skilled at integr ...

...her radio frequencies, and transparent dielectric waveguides and [[optical fiber]]s serve as waveguides for light. In [[acoustics]], air ducts and [[Horn ...by its size and will not conduct waves of greater wavelength; an [[optical fiber]] that guides [[light]] will not transmit [[microwaves]] which have a much ...

...] (NIRS); but also include [[biosensors]], [[Raman spectroscopy]], [[fiber optics]] and others. ...

...he glass envelope with a translucent paint which acts as a color [[Filter (optics)|filter]]. Some early Japanese-made lamps used colored glass.<ref>{{cite we ==Fiber optic lights== ...

If the surface is patterned with different biopolymers, using adequate optics and imaging sensors (i.e. a camera), the technique can be extended to [[sur === Fiber-optic SPR === ...

...ant new applications were added to the text, such as [[Optical fiber|fiber optics]] and dielectric [[waveguide]]s, which are crucial in modern communications ...

| journal=Optics Express ...his is an important effect in the propagation of signals through [[optical fiber]]s and in the design of high-power, short-pulse lasers. ...

It is a key enabling technology for [[quantum optics]] and optical [[Quantum technology|quantum technologies]]. SNSPDs are avail ...ostrip single-photon detector fabricated by ultraviolet photolithography,” Optics Express, vol. 31, pp. 16348-16360.</ref> This is important because optical ...

...is transferred between a source and a load, such as in [[acoustics]] or [[optics]]. ...trical systems involving [[transmission line]]s (such as radio and [[fiber optics]])—where the length of the line is long compared to the wavelength of the s ...

* [[Hydroxyl ion absorption]] in [[optical fiber]] ...ic Gases (spectral databases)|publisher=V.E. Zuev Institute of Atmospheric Optics SB RAS|access-date=August 8, 2012|quote=... various data sources: HITRAN an ...

==== Fiber optics ==== ...osses]] in the waveguide walls become large. Instead, [[fibre optics|fiber optics]], which are a form of dielectric waveguides, can be used. For such frequen ...