Spontaneous Emission

Spontaneous Emission

Decay of an excited atom to a ground or resting state by the random emission of one photon. The decay is determined by the lifetime of the excited state.

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Industry/Domain: Industrial machinery
Category: Laser equipment
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spontaneous emission

Telecommunications; General telecom

Radiation emitted when the internal energy of a quantum mechanical system drops from an excited level to a lower level without regard to the simultaneous presence of similar ...

induced and spontaneous emission

Materials science; Material physics

Processes by which an atom or molecule emits light while making a transition from a state of higher energy to one of lower energy. The rate for induced emission is proportional to ...

spontaneous emission lifetime

Materials science; Material physics

The inverse of the spontaneous emission rate.

Emission

Industrial machinery; Laser equipment

Act of giving off radiant energy by an atom or molecule.

Absorb

Industrial machinery; Laser equipment

To transform radiant energy into a different form accompanied by a rise in temperature.

Absorption Coefficient

Industrial machinery; Laser equipment

Factor describing light's ability to be absorbed per unit of path length.

Accessible Emission

Industrial machinery; Laser equipment

The magnitude of accessible laser (or other collateral) radiation of a specific wavelength or emission duration at a particular point as measured by appropriate methods and ...

Accessible Emission Limit

Industrial machinery; Laser equipment

The maximum accessible emission level limit (AEL) permitted within a particular class. In ANSI Z-136.1, AEL is determined as the product of Accessible Emission times the Maximum ...

Active Medium

Industrial machinery; Laser equipment

Collection of atoms or molecules capable of undergoing stimulated emission at a given wavelength.

Afocal

Industrial machinery; Laser equipment

Literally, "without a focal length"; an optical system with its object and image point at infinity.

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