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Encyclopedia > Dye laser
Close-up of a table-top dye laser based on Rhodamine 6G, emitting at 580 nm (yellow-orange). The emitted laser beam is visible as faint yellow lines. The orange dye solution enters the laser from the left, and is pumped by a 514 nm (blue-green) beam from an argon laser. The dye jet is in the center of the image, behind the yellow window.
Close-up of a table-top dye laser based on Rhodamine 6G, emitting at 580 nm (yellow-orange). The emitted laser beam is visible as faint yellow lines. The orange dye solution enters the laser from the left, and is pumped by a 514 nm (blue-green) beam from an argon laser. The dye jet is in the center of the image, behind the yellow window.

A dye laser is a laser which uses an organic dye as the lasing medium, usually as a liquid solution. Compared to gases and most solid state lasing media, a dye can usually be used for a much wider range of wavelengths. The wide bandwidth makes them particularly suitable for tunable lasers and pulsed lasers. Moreover, the dye can be replaced by another type in order to generate different wavelengths with the same laser, although this usually requires replacing other optical components in the laser as well. Image File history File links Size of this preview: 780 × 600 pixelsFull resolution (1200 × 923 pixel, file size: 203 KB, MIME type: image/jpeg) Coherent model 899 ring dye laser, with rhodamine 6G dye, pumped with a 514 nm argon laser. ... Image File history File links Size of this preview: 780 × 600 pixelsFull resolution (1200 × 923 pixel, file size: 203 KB, MIME type: image/jpeg) Coherent model 899 ring dye laser, with rhodamine 6G dye, pumped with a 514 nm argon laser. ... Rhodamine B Rhodamine 6G Rhodamine is a family of related chemical compounds. ... Experiment with a laser (likely an argon type) (US Military) In physics, a laser is a device that emits light through a specific mechanism for which the term laser is an acronym: light amplification by stimulated emission of radiation. ... Benzene is the simplest of the arenes, a family of organic compounds An organic compound is any member of a large class of chemical compounds whose molecules contain carbon and hydrogen; therefore, carbides, carbonates, carbon oxides and elementary carbon are not organic (see below for more on the definition controversy... Look up dye in Wiktionary, the free dictionary. ... A laser system generally consists of three important parts: An energy source (usually referred to as the pump or pump source); A gain medium or laser medium; A mirror, or system of mirrors, forming an optical resonator. ... A liquid will usually assume the shape of its container A liquid is one of the main states of matter. ... Dissolving table salt (NaCl) in water This article is about a chemical solution; for other uses of the term solution, see solution (disambiguation). ... This article does not cite any references or sources. ... In electronics, solid state circuits are those that do not contain vacuum tubes. ... The wavelength is the distance between repeating units of a wave pattern. ... Tunable lasers are used in DWDM-systems to allow wavelength (frequency) changes controlled by the operator. ...


The long-wavelength absorption band of laser dyes is attributed to the transition from the electronic ground state S0 to the first excited singlet state S1. The transition moment [[1]] for this process is typically very large, thus giving rise to an absorption band with an oscillator strength on the order of unity. The reverse process S1->S0 is responsible for the spontaneous emission known as fluorescence and for the stimulated emission in dye lasers.


Dye lasers are also used dermatologically, to make skin tone more even.


Construction

Since organic dyes tend to degrade under the influence of light, the dye solution is normally circulated from a large reservoir. The dye solution can be flowing through a cuvette, i.e., a glass container, or be as a dye jet, i.e., as a sheet-like stream in open air from a specially-shaped nozzle. With a dye jet, one avoids reflection losses from the glass surfaces and contamination of the walls of the cuvette. These advantages come at the cost of a more-complicated alignment. A cuvette is a kind of laboratory glassware, usually a small square tube, sealed at one end, made of plastic, glass, or optical grade quartz and designed to hold samples for spectroscopic experiments. ...


Chemicals used

Some of the dyes are Rhodamine 6G, fluorescein, coumarin, stilbene, umbelliferone, tetracene, malachite green, and others. Rhodamine B Rhodamine 6G Rhodamine is a family of related chemical compounds. ... Fluorescein in dropper used for eye examination. ... Coumarin is a chemical compound found in many plants, notably in high concentration in the tonka bean, woodruff, and bison grass. ... Stilbene is a colorless or yellowish crystalline compound. ... Umbelliferone or 7-hydroxycoumarin is a widespread natural product of the coumarin family. ... Tetracene, also called naphthacene and 2,3-benzanthracene, is a polycyclic aromatic hydrocarbon. ... Malachite green, also called aniline green, basic green 4, diamond green B, or victoria green B, IUPAC name:4-[(4-dimethylaminophenyl)-phenyl-methyl]-N,N-dimethyl-aniline) is a toxic chemical primarily used as a dye. ...


Adamantane is added to some dyes to prolong their life. Adamantane (Tricyclo[3. ...


Cycloheptatriene and cyclooctatetraene (COT) can be added as triplet quenchers for rhodamine G, increasing the laser output power. Output power of 1.4 kilowatt at 585 nm was achieved using Rhodamine 6G with COT in methanol-water solution. Cycloheptatriene Cycloheptatriene (CHT), or 1,3,5-cycloheptatriene, is a clear, yellow to brown, flammable liquid with melting point -80 °C and boiling point 116 °C, insoluble in water. ... 1,3,5,7-Cyclooctatetrene (COT) is an unsaturated derivative of cyclooctane, with the formula C8H8. ... A triplet is a set of three items, and includes in particular: one of three babies in a multiple birth in lapidary, a preparation of opal as a gemstone, with a thin layer of opal backed with a dark material and covered with cap of clear quartz in optics a...

An atomic vapor laser isotope separation experiment at LLNL. Green light is from a copper vapor pump laser used to pump a highly tuned dye laser which is producing the orange light.
An atomic vapor laser isotope separation experiment at LLNL. Green light is from a copper vapor pump laser used to pump a highly tuned dye laser which is producing the orange light.

Image File history File links Size of this preview: 800 × 599 pixelsFull resolution (950 × 711 pixel, file size: 137 KB, MIME type: image/jpeg) An atomic vapor laser isotope separation experiment at LLNL. Green light is from copper vapor pump laser used to pump a highly tuned dye laser (producing... Image File history File links Size of this preview: 800 × 599 pixelsFull resolution (950 × 711 pixel, file size: 137 KB, MIME type: image/jpeg) An atomic vapor laser isotope separation experiment at LLNL. Green light is from copper vapor pump laser used to pump a highly tuned dye laser (producing... An atomic vapor laser isotope separation experiment at LLNL. Green light is from a copper vapor pump laser used to pump a highly tuned dye laser which is producing the orange light. ...

Reference

F. P. Schäfer and K. H. Drexhage, Dye Lasers., 2nd rev. ed., vol. 1, Berlin ; New York: Springer-Verlag, 1977.


  Results from FactBites:
 
Laser - Wikipedia, the free encyclopedia (4669 words)
Lasers range in size from microscopic diode lasers (top) with numerous applications, to football field sized neodymium glass lasers (bottom) used for inertial confinement fusion, nuclear weapons research and other high energy density physics experiments.
The output of a laser may be a continuous, constant-amplitude output (known as CW or continuous wave), or pulsed, by using the techniques of Q-switching, modelocking, or gain-switching.
In 1916, Albert Einstein laid the foundation for the invention of the laser and its predecessor, the maser, in a ground-breaking rederivation of Max Planck's law of radiation based on the concepts of spontaneous and induced emission.
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