Publication

A solid state laser at 4.96 mm: carbon monoxide in crystalline nitrogen

Majed Chergui
1991
Journal Articles

Abstract

Laser generation at 4.96 mm was achieved on the v = 2 -> v = 1 transition of 13C18O dild. in N2 crystals. Conversion efficiencies of 10-20% and stimulated emission cross-sections of ~10-15-10-13 cm2 are reported. [on SciFinder (R)]

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Majed Chergui
1991
Journal Articles

Abstract

Official source

Related concepts (22)

Laser diode

A laser diode (LD, also injection laser diode or ILD, or diode laser) is a semiconductor device similar to a light-emitting diode in which a diode pumped directly with electrical current can create lasing conditions at the diode's junction. Driven by voltage, the doped p–n-transition allows for recombination of an electron with a hole. Due to the drop of the electron from a higher energy level to a lower one, radiation, in the form of an emitted photon is generated. This is spontaneous emission.

Laser

A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The word laser is an anacronym that originated as an acronym for light amplification by stimulated emission of radiation. The first laser was built in 1960 by Theodore Maiman at Hughes Research Laboratories, based on theoretical work by Charles H. Townes and Arthur Leonard Schawlow. A laser differs from other sources of light in that it emits light that is coherent.

Stimulated emission

Stimulated emission is the process by which an incoming photon of a specific frequency can interact with an excited atomic electron (or other excited molecular state), causing it to drop to a lower energy level. The liberated energy transfers to the electromagnetic field, creating a new photon with a frequency, polarization, and direction of travel that are all identical to the photons of the incident wave. This is in contrast to spontaneous emission, which occurs at a characteristic rate for each of the atoms/oscillators in the upper energy state regardless of the external electromagnetic field.

Related publications (14)

A solid state laser at 4.96 mm: carbon monoxide in crystalline nitrogen

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