laser is a device that makes a light beam with a given energy (ie a link to the color of light) and will be amplified in the same direction as the incident beam. So, making an impact on some laser light with a certain power, we can get a beam of light from a much higher power. A laser device itself is a device that needs batteries or power supply connection through cuto generate a beam of light of a certain energy that passes through the amplifier material, and produces a beam of light in a particular direction with much more power.
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| - Ch.A.Townes et al.: discussion about the possibility of population inversion of the radiation through an amplifier (-> 1954) - CS van Heel, HHHopkins und NSKapany: first fiberglass coating center and |
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| 1954 - NGBasov und AMProhorov: propositions and calculations for a microwave oscillator based on the emission stimulated - Ch.H.Townes et al.: first maser (Microwave Amplification by Stimulate = Emission of Radiation) based on ammonia molecules | - NSKapany: coined the term "fiber optics" ; |
| 1956 - N. Bloembergen: theory of paramagnetic amplifier & eacute; tico low noise in a system of three surfaces | - RHDicke: first American patent for a maser to infrared emission (not done) |
| 1958 - L. Schawlow und Ch . H. Townes: proposals and estimates for construction of masers for visible and infrared light (-> 1960) | |
| - NGBasoc et al.: Proposal for a semiconductor laser (-> 1962)
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| - A. Javan: Erster Gaslaser, stimulated emission with a long length wavelength of 1.15 microns in a gas mixture of helium and neon, where the neon was the emitting atom. - PPSorokin und MJStevenson: stimulated emissionU3 +: CaF2 at wavelengths of 2.5 microns and 2.6 microns - FGHoutermans: Proposal to use an excimer laser as means (-> 1971) |
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| 1961 - AGFox und T. Li, GDBoyd und JPGordon: theory of optical resonators with spherical mirrors | - PPSorokin und MJStevenson, W. Kaiser et al.: stimulated emission of Sm2 +: CaF2 with a length of wavelength of 0.7080 micrometers - E. Snitzer: Stimulated emission of Nd3 +: Glas with a wavelength of 1.0623 micrometers - JCPolani: A Proposed Laser & qu iacute, monkey (-> 1965) | - PAFranken et al.: first frequency doubling of laser light (ruby) as it passes through a quartz crystal (-> 1962)
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| | - M. Coupland: first application a GaAs laser diode and optical amplifier
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| 1965 - JVVKasper und GCPimentel: first embodiment of a chemical laser based on HCl, 3.5 micrometers wavelength |
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| 1966 - R. Kantrowitz et al.: first embodiment of a dynamic CO2 laser wavelength of 10 micrometers - PPSorokin und JRLankard: first color laser pulse, stimulated emission of phthalocyanine chloride aluminum, diluted in alcohol and1969 |
| 1970 | - OGPeterson et al.: Continuous stimulated emission and rhodamine 6G |
| 1977 - DAGDeacon et al.: first "conduction electrons", Laser
| | 1978 - JCWalling: Só body laser lido continuously adjustable based on alexandrite (BeAl2O4: Cr3 +), adjustable from 710 nm to 820 nm
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| 1ividuales (called Rydberg) can induce excitation to the resonator continuously: first atom maser (-> 1994) |
| 1985 - L. Anesson and FKKneubühl: the ; be with feedback coil (Helical Feedback (HFB)) | - S. Chu et al.: develop life a method of cooling atomic beams - DLMatthews et al.: xr-ray laser ( "Soft x-ray amplifier" with a wavelength of 15 nm) - TJKane and RLByer: ring laser Nd: YAG diode-excited monolithic |
| 1990 | |
| 1991 - M. Haase et al.: short-term primary function of a blue-green laser based on II-VI semiconductors, ZnSe |
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| - G. Green, G. Leising et al.: LED organic polymer that emit in the blue spectrum | C5 |
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| - S. Nakamura: first efficient laser diode that emits blue ambienteE temperature, based on III-V semiconductor-GaN - RHFriend: laser optically excited polymer |
| - W. Ketterle et al. MRAndrews et al.: Check the Bose coherent character (-> 1999) CHT | MLXC 1999 |
| - W. Ketterle et al., M. Kozuma et al.: First atomic laser: coherent amplification material waves passing through a tank to volumes - Paintner O. et al.: optical excitation causes a porous structure activity InGaAsP laser |
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| PROCESSES main components: | 1. Active medium for laser training
| 4. 99% reflective mirror 5. Laser emission | |
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| Raised by a radiation source such as a lamp, the passage of an electric current, or using any other energy source & eacumonochromatic radiation generated inconsistently.
| stimulated emission of radiation
| Stimulated emission, based on the generation of laser radiation, occurs when an atom in an excited state receives a external stimulus that leads to emit photons and thus return to a less excited. The stimulus in question comes from the arrival of a photon with energy similar to the energy difference between the two states. The photons emitted by the atom and have stimulated phase di energíayor to cut the tissue, but also making sure that only goes in the direction where that tissue is respecting the surrounding tissue. | is also present in many of |
| , left there mirrors. And from here it has been created with a laser light beam powerful enough to arrive at the Moon and return, and in a specific direction to bear in the mirror. So just had to measure time Sunday, December 6, 2009Configurations And Elfa Work XC Raised by a radiation source such as a lamp, the passage of an electric current, or using any other energy source to cause an issue. In the laser pumping can be electrical or optical means or light flash tubes. optical resonator is composed of two mirrors to achieve the amplification and in turn create the laser beam. Two types of resonators: resonator stable laser emits a single beam, and Unstable Resonator, emits more beams. spontaneous emission of radiation The electrons return to ground state emittingamp; iacute; to higher electron passing a metastable state. This phenomenon competes with stimulated emission of radiation. Applications lasers size varies widely, from microscopic diode lasers (top) with numerous applications, the neodymium glass laser with a size or similar to a football pitch, (below) used for inertial confinement fusion, nuclear weapons research of mass destruction or other physical experiments which are subject to high densities of energy & imonochromatic and the ability to achieve extremely high powers. For example, a highly coherent laser beam can be focused below the diffraction limit at visible wavelengths, corresponding to only a few nanometers. When focusing a powerful laser beam on a point, it receives an enormous energy density. [5] This property allows the laser burn gigabytes of information on the microscopic cavities of a Blu-ray, DVD or CD. It also allows a medium or low laser intensities reach very high power and use it to cut, burn or even sublimating materials. Titanium doped sapphire is an easily tunable infrared laser used in spectroscopy. Ray l & aaopad erbium, 1645 nm thulium-doped YAG, 2015 nm holmium-doped YAG, 2090 nm, a high-power laser operating in infrared light is absorbed by explosively moisture impregnated sections under of a millimeter thick. Usually operates in pulse mode and passes through optical fiber surgical devices. Is used to remove stains from teeth, vaporize cancerous tumors and kidney stones and gall undo. Laser laser erbium-doped fiber, a tip
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