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Excelitas Technologies Corp. - X-Cite Vitae HP 11/24

8,726 terms

Photonics Dictionary

FSO

free-space optics

FSR

free spectral range

FSS

flying spot scanners

Fourier transform

ft lb

foot pound

FTC

field test collimator

FTCCD

field transfer charge-coupled device

FTIR

Fourier transform infrared; frustrated total internal reflection

FTIR spectrometer

FTIR (Fourier transform infrared) spectrometer is a powerful analytical instrument used to obtain an infrared spectrum of absorption or emission of a solid, liquid, or gas sample. It operates based...

FTPSI

Fourier transfer phase-shifting interferometry

FTS

Fourier transform spectroscopy

FTTC

fiber to the curb

FTTH

fiber to the home

full duplex -> duplex

In data communications, the simultaneous operation of a circuit in both directions is known as full duplex; if only one transmitter can send at a time, the system is called half duplex.

full duration half maximum -> full width half maximum

The full width at half maximum (FWHM) is a measure used in various fields, particularly in spectroscopy, signal processing, and imaging, to characterize the width or extent of a distribution, peak,...

full radiator -> blackbody

An ideal body that completely absorbs all radiant energy striking it and, therefore, appears perfectly black at all wavelengths. The radiation emitted by such a body when heated is referred to as...

full wave compensator

A piece of uniform birefringent material placed at a 45° angle to the plane of polarization in a polarizing microscope to indicate changes in color caused by interference when a birefringent...

full width half maximum

full-well capacity

The number of electrons that each pixel of a charge-coupled device can hold without overflowing and causing blooming.

fullerenes

Molecules composed entirely of carbon, in the form of a hollow sphere, ellipsoid or tube. Also called buckyballs. Cylindrical fullerenes are called carbon nanotubes or buckytubes.

function generator

A computer hardware unit that generates required functional information on the screen by controlling CRT beam movements or intensity.

functional material

Functional materials refer to materials that possess specific properties or functionalities that make them suitable for particular applications or purposes. These materials are designed and...

functional near-infrared spectroscopy

Functional near-infrared spectroscopy (fNIRS) is a non-invasive neuroimaging technique that measures changes in hemoglobin concentration in the brain. It utilizes near-infrared light to penetrate the...

fundamental mode

The lowest order mode of a waveguide. In fibers, the mode designated LP01 or HE11.

furnace

See glass annealing furnace; glass melting furnace.

fused array of fibers

Optical fibers fused together to form a solid, vacuum-tight assembly in the form of a slab or rod. Discs or rectangular shapes having ground and polished surfaces perpendicular to the fiber lengths...

fused quartz and silica

Fused quartz and silica are closely related materials, both composed primarily of silicon dioxide (SiO2), but they are produced through different manufacturing processes and have distinct properties...

fused silica

Glass consisting of almost pure silicon dioxide (SiO2). Also called vitreous silica. Frequently used in optical fibers and windows.

fusing

The permanent uniting of two glass pieces by high-temperature heating.

fusion

1. The combination of the effects of two or more stimuli in any given sense to form a single sensation. With respect to vision, the perception of continuous illumination formed by the rapid...

fusion ignition

Fusion ignition refers to the point in a controlled nuclear fusion reaction where the energy released by the fusion reactions becomes self-sustaining, leading to a continuous release of energy...

fusion splice

A splice accomplished by the application of localized heat sufficient to fuse or melt the ends of two lengths of optical fiber, forming a continuous single fiber.

FVD

front vertex focal distance

FWA

fluorescent whitening agents

FWHM

full width half maximum

FWM

four-wave mixing

giga-; gauss

gram; groove

acceleration of gravity

GaAlAs laser

A GaAlAs laser is a type of semiconductor laser diode that emits light in the near-infrared region of the electromagnetic spectrum. It is composed of layers of gallium, aluminum, and arsenic, hence...

GADS-CAG

gadolinium scandium aluminum garnet

gain coefficient -> absorption coefficient, absorption cross section

The transition cross section constant coefficient which defines the transition probability of absorption from ground to a higher level within a given atomic or molecular species. The transition...

gain

Also known as amplification. 1. The increase in a signal that is transmitted from one point to another through an amplifier. A material that exhibits gain rather than absorption, at certain...

gain-bandwidth product

In an avalanche photodiode, the gain multiplied by the signal frequency in MHz.

gain-guided laser

A laser diode in which the beam is confined to the region of the active layer with gain high enough to accomplish such confinement without a built-in refractive index profile. That region generally...

gain-switching

Gain-switching is a technique used in lasers to generate short pulses of light by modulating the gain of the laser medium. This method is distinct from Q-switching and mode-locking, two other common...

Galilean telescope

A refracting telescope that yields an erect image by the use of a positive lens for its objective and a negative lens for its eyepiece.

gallium aluminum arsenide

A crystalline semiconductor alloy used as the light confinement layer in both single- and double-heterostructure diode lasers.

gallium antimonide

A binary semiconductor compound used as a substrate or active layer for diode lasers.

gallium arsenide injection laser

A laser system consisting of a planar PN junction within a single crystal of gallium arsenide. The pair of parallel, semireflective end faces produces a Fabry-Perot resonant cavity, whereas the other...

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