Lasing without inversion (LWI), or lasing without population inversion, is a technique used for light amplification by stimulated emission without the...
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technique, known as lasing without inversion, allows optical amplification to take place without producing a population inversion between the two states...
21 KB (3,062 words) - 13:43, 26 July 2024
context of Fermi gases. Polariton condensation is sometimes called “lasing without inversion”. Polaritons are bosonic quasiparticles which can be thought of...
15 KB (1,621 words) - 16:20, 30 October 2022
amplification without requiring a population inversion. The effect was the precursor of a class of effects known as Lasers Without Inversion, or the LWI...
15 KB (1,633 words) - 06:57, 11 July 2024
effects, such as electromagnetically induced transparency (EIT), lasing without inversion (LWI), stimulated raman adiabatic passage (STIRAP) and nonlinear...
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to: Legal Writing Institute, an American non-profit organization Lasing without inversion, a laser technique Living Water International, a faith-based non-profit...
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spectroscopy, from electromagnetically induced transparency and lasing without inversion to nonlinear optics at maximal coherence. 2000 Alexander Prokhorov...
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be configured to emit photons either perpendicular or horizontal to the lasing medium layers depending on end use. Direct diode infrared semiconductor...
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to produce a population inversion. Feedback of the ASE by the laser's optical cavity may produce laser operation if the lasing threshold is reached. Excess...
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also form an optical cavity. In 1986 Richard K. Chang et al. demonstrated lasing using ethanol microdroplets (20–40 micrometers in radius) doped with rhodamine...
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titled "Light Amplifiers Employing Collisions to Produce Population Inversions" (subsequently amended as a continuation in part and finally issued as...
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lasers. An FP laser will lase at multiple cavity modes within the gain bandwidth of the lasing medium. The number of lasing modes in an FP laser is usually...
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communications performance 10 to 100 times over radio frequency technology without incurring increases in mass, volume or power. DSOC is capable of providing...
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developed. Some are known as dynamic auto focus systems. They adjust the lasing parameters in real time to adapt to the changes to the material as it is...
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28, 1997 and expired January 28, 2014. A similar process was patented without being commercialized by R. F. Housholder in 1979. As SLS requires the use...
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that 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...
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recombination is strictly suppressed. This allows for devices with high lasing efficiency, low lasing threshold, and stable frequency, where the liquid-crystal laser...
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ultraviolet and x-rays means that X-ray free electron lasers (XFEL) need to work without a resonant cavity. Consequently, in an X-ray FEL (XFEL) the beam is produced...
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Bragg reflectors. An early demonstration of polaritonic lasing and a comparison to conventional lasing was achieved in 2003 by H. Deng et al. at Stanford University...
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picosecond) dissociates back into two unbound atoms. This forms a population inversion.[citation needed] The wavelength of an excimer laser depends on the molecules...
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characteristic makes it easier to achieve population inversion, a crucial requirement for lasing, when using lanthanide-activated gain materials. Miniaturized...
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layers than conventional Raman, can be used to discover counterfeit drugs without opening their packaging, and to non-invasively study biological tissue...
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neodymium-doped yttrium lithium fluoride (Nd:YLF)), which lases deeper in the infrared at 1064 nm. This lasing action is due to an electronic transition in the...
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content team, content team (July 23, 2019). "LASEK: A Magic Helping You Do Without Eyeglasses". sinahealthtour.com. Archived from the original on July 25...
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all for the goal of being isolated as purely as possible. For transport without contact. There are three different approaches. Transport by gravity using...
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its directional precision, a laser precisely cuts and cauterizes tissues without damaging neighboring cells. It's the safest technique and most precise...
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clean surfaces, remove paint or coating, or prepare surfaces for painting without damaging the underlying surface. High power lasers clean a large spot with...
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on walls, ceilings or other surfaces including theatrical smoke and fog without refocusing for the differences in distance, as is common with video projection...
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colliding-pulse mode-locked laser the absorber steepens the leading edge, while the lasing medium steepens the trailing edge of the pulse. There are also passive mode-locking...
27 KB (3,842 words) - 01:08, 14 July 2024