Liquid Laser

liquid laser

[′lik·wəd ′lā·zər]
A laser whose active material is dissolved in a liquid contained in a transparent cylindrical shell; rare-earth ions in suitable dissolved molecules and organic dye solutions are used.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Liquid Laser


a laser with a liquid active material. The advantage of a liquid laser is the feasibility of cooling the liquid by circulation. This permits production of higher energy both in pulsed and continuous operation.

In the first liquid lasers solutions of rare-earth chelates were used. They have not yet found application because of the low attainable energy and the insufficient stability of the chelates. Liquid lasers using inorganic active liquids (proposed and synthesized in the USSR) have high pulse energies at considerable mean power. In addition liquid lasers generate radiation with a narrow frequency spectrum.

Liquid lasers using solutions of organic dyes have some interesting properties. The broad spectral lines of organic dyes permit the construction of a liquid laser with continuous tuning of the emitted wavelength within a range of several hundreds of A. By changing the dyes, the whole visible spectrum and a part of the infrared spectrum can be covered. Liquid dye lasers usually use solid lasers as a pumping source. Some dyes can be pumped by special flash fluorescent lamps, which give shorter and more intensive flashes of white light than are given by the usual flash lamps (less than 50 microseconds).


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
DARPA began integrating the high energy liquid laser area defense systems, or HELLADS, into a ground-based demonstrator in 2015.
DARPA's answer to increasingly sophisticated surface-to-air threats is the High Energy Liquid Laser Area Defense System (HELLADS), the liquid cooled lasers that would be mounted on turrets on combat airplanes to shoot down incoming rockets or missiles.
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The most widely used liquid laser is the dye laser.
The rise of drone use around the world and advancements in solid state and liquid lasers have led to the proliferation of laser technology across the U.S.
Organic liquid lasers give off light at wavelengths not previously available and are predicted to become important in the fundamental understanding of matter.