Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 7039088 | Enhancement of chemical lasers via control of the ambient radiation environment A system and method for obtaining improved performance of chemical laser systems by exercising control over the radiation environments of these devices. Proper control of the AERE is achieved through the control of the wall construction including the choice of mater... | 05/02/2006 |
| 7016390 | Ultrabright tunable coherent multikilovolt x-ray source The generation of ultrabright, multikilovolt coherent tunable x-radiation resulting from amplification on hollow atom transition arrays is described. Amplification has been demonstrated by physical evidence including (a) the observation of selected spectral componen... | 03/21/2006 |
| 6963594 | Organic laser cavity device having incoherent light as a pumping source An organic laser cavity device, that includes: a first dielectric stack for receiving and transmitting pumped beam light and being reflective to laser light over a predetermined range of wavelengths and having a substantially low threshold for optical excitation; an... | 11/08/2005 |
| 6801676 | Method and apparatus for phase shifting an optical beam in an optical device with a buffer plug An apparatus and method for modulating a phase of optical beam with reduced contact loss. In one embodiment, an apparatus according to embodiments of the present invention includes a first region of an optical waveguide disposed in semiconductor material. The first ... | 10/05/2004 |
| 6215809 | Stabilization of laser sources with closely-coupled optical reflectors using an internal dither circuit Apparatus for providing a laser source optically coupled to an optical waveguide, such as an optical fiber, having a reflective grating positioned from the output facet of the laser source a distance equal to or greater than the coherence length of the la... | 04/10/2001 |
| 5313477 | Rare earth ion doped CW cascade fiber laser A continuous wave(CW) activator ion doped fiber laser is presented which lases at a normally self-terminating laser transition at a slope efficiency greater than that achieved by a self-terminating fiber laser. Two laser transitions, one corresponding to ... | 05/17/1994 |
| 5003547 | Room-temperature, flashpumped, 1.96 micron solid state laser A room temperature solid state laser for producing a laser emission at a wavelength of substantially 1.96 microns is disclosed. In a preferred embodiment, the laser includes: a laser cavity defined by a plurality of coated reflective elements to form a re... | 03/26/1991 |
| 4951297 | Chemical process yielding stimulated emission of visible radiation via fast near resonant energy transfer A chemical process yielding stimulated emission of visible radiation via fast rear resonant intermolecular energy transfer comprising the steps of reacting a first metal or semimetal vapor with a reactant to produce a metastable excited state reaction pro... | 08/21/1990 |
| 4807240 | Frequency adding lasers and optical amplifiers A method for creating population inversions for use in stimulated emission devices which beam combine, beam clean-up, or frequency up-convert electromagnetic radiation. The invention comprises near resonantly enhanced multiphoton pumping of a multilevel q... | 02/21/1989 |
| 4782494 | Method of providing continuous lasing operation The method of producing at least quasi-continuous lasing operation between initial and terminal lasing states comprising the steps of selecting a laser medium and cavity configuration (lasing frequency) with the laser medium containing upconverting materi... | 11/01/1988 |
| 4477906 | Method and apparatus for population inversion Stimulated emission at the approximate wave length of 4.5 microns, 2.25 microns and 1.6 microns is obtained from pumping on an excited energy level. The phenomenon of photon avalanching is utilized to create a population inversion within three lower level... | 10/16/1984 |
| 4381565 | Radiative removal of lower laser level bottlenecking Stimulated emission resulting from a secondary source of radiation transfers population from a lower laser level of a primary lasing transition to a third energy level which is not involved in the primary lasing of a laser system to reduce lower laser lev... | 04/26/1983 |
| 4380072 | XUV Laser and method The method of generating XUV radiation which involves exciting atoms to a storage level, irradiating the excited atoms and raising them to a higher level and allowing the atoms to lase to a lower level other than ground which is simultaneously emptied.... | 04/12/1983 |
| 4375689 | Operation of a two-photon three level laser The operation of a two-photon, three level laser system at high temperatures or pressures is made possible by reducing the build up time of the flux of the second lasing transition in the laser discharge region.... | 03/01/1983 |
| 4360924 | Laser bottlenecking technique A technique for lasing a gas in a gas lasing device to obtain stimulated light emission at a desired wavelength by bottlenecking the high gain transitions in the gas so that certain low gain transitions which will yield the desired wavelength are now able... | 11/23/1982 |
| 4344174 | Gas lasers A laser having a gaseous mixture including carbon dioxide as the lasing medium, wherein the lasing medium is cooled to a temperature such that the thermal population of the lower energy level of an output lasing transition between a higher energy level an... | 08/10/1982 |
| 4276517 | CO Pumped CO2 16 micron laser A CO2 medium is optically pumped by a five micron CO laser to the 03'0 level which radiates with 16 micron emission to the 02°0 level. The resulting 16 micron laser finds application in laser uranium enrichment operating to provide excitation ... | 06/30/1981 |
| 4249139 | CO2 laser emitting at 16 microns in 02°0-01'0 transition A CO2 laser capable of emitting at 16 microns in the transition from the 02°O to the 01'0 energy levels. The laser is particularly adaptable for use in laser enrichment to photoexcite uranium hexafluoride molecules. The CO2 medium i... | 02/03/1981 |
| 4206429 | Gas dynamic mixing laser A high power gas dynamic mixing laser capable of having an energizing gas formed by an exothermic decomposition process is disclosed. The laser includes a housing having a reaction chamber in which an excitation gas is formed by thermal decomposition of a... | 06/03/1980 |
| 4168474 | Generation of 14 μm and 16 μm laser radiation from a CO2 gas laser Described herein is a technique for generating 16 μm laser radiation from a CO2 molecular gas laser system by use of the 020 0-011 0 vibrational transition of CO2. The technique employs a system for pumping the... | 09/18/1979 |
| 4143337 | Method of pumping A CO2 gas laser is disclosed which is capable of operation at or above atmospheric pressure and requires no windows or evacuation system. Substantial increases in power output, simplicity and cheapness are achieved.... | 03/06/1979 |
| 4075579 | Gaseous laser medium and means for excitation A gaseous laser medium is photodissociated into an upper laser state by vacuum ultraviolet light from an electrically excited noble gas mixed with the laser medium. A gaseous laser medium, such as cyanogen bromide, is preferably resonantly excited by phot... | 02/21/1978 |
| 4063190 | CO2 laser The disclosure relates to a pulsed gas laser comprising an optical resonant cavity, a CO2 lasing medium, structure for containing the CO2 lasing medium within the optical cavity and a device for causing a population inversion in the ... | 12/13/1977 |
| 4053845 | Optically pumped laser amplifiers Optically pumped laser amplifiers are disclosed. One type of such amplifier utilizes an excitable medium, the atoms, ions or molecules of said medium having well defined energy states including a lowest state, a lower state above said lowest state, and a ... | 10/11/1977 |
| 4004250 | Laser action by optically depumping lower states A method and apparatus for obtaining laser action between an upper energy level and a lower energy level of a gaseous medium, which comprises populating the upper energy level to some degree (short of achieving a conventional inverted population) by any s... | 01/18/1977 |
| 3992683 | Optically pumped collision laser in Hg at 546.1 nm A laser cavity containing a mixture of nitrogen, N2, and mercury, Hg, gas is optically pumped by a lamp containing mercury to produce a laser output of 546.1 nm. The upper laser level is excited through optical pumping by a resonance lamp while... | 11/16/1976 |
| 3970964 | High-power argon/nitrogen transfer laser A new class of high-power lasers capable of high efficiencies in the visible and shorter wave lengths is taught, employing an excitation energy transfer mechanism from a pumped noble donor gas, such as Argon, to an acceptor lasing gas, preferably Nitrogen... | 07/20/1976 |
| 3940298 | Thermal laser pumped with high nitrogen content propellants Thermal lasers use aliphatic polynitro compounds and polynitroamines as oxidizers and tetrazoles, ditetrazolyls, tetrazines, triazines and guanidines as fuel.... | 02/24/1976 |
