Photonics Dictionary: T

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wave guide x

T x

thin-film waveguide

A transparent dielectric film, bounded by material of a lower index of refraction, capable of guiding light.

tapered transmission line -> tapered waveguide

A waveguide having a characteristic that is altered continuously with the distance traveled, relative to the axis of its path.

tapered waveguide

A waveguide having a characteristic that is altered continuously with the distance traveled, relative to the axis of its path.

terahertz spectrometer

A terahertz spectrometer is a scientific instrument used to measure and analyze the properties of materials in the terahertz frequency range, typically spanning from about 0.1 to 10 terahertz (THz),...

Ti:sapphire laser

A Ti:sapphire laser is a type of solid-state laser that utilizes a titanium-doped sapphire crystal as the gain medium. The name Ti:sapphire comes from the combination of titanium (Ti) as the dopant...

transverse offset loss -> lateral offset loss

A power loss caused by transverse or lateral deviation from optimum alignment of source to optical waveguide, waveguide to waveguide, or waveguide to detector.

trapped mode -> guided mode

In an optical waveguide, a mode whose field decays monotonically in the transverse direction everywhere external to the core and which does not lose power to radiation. Also called bound mode.

trapped ray -> guided ray

In an optical waveguide, a ray that is completely confined to the core.

tunneling mode -> leaky mode

In an optical waveguide, a mode whose field decays monotonically for a finite distance in the transverse direction but which becomes oscillatory everywhere beyond that finite distance.

tunneling ray -> leaky ray

In an optical waveguide, a ray for which geometric optics would predict total internal reflection at the core boundary, but which suffers loss by virtue of the curved core boundary.

Photonics DictionaryT

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