Patents by Inventor Markus P. Hehlen
Markus P. Hehlen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9702984Abstract: Scintillator-based radiation detectors capable of transmitting light indicating the presence of radiation for long distances are disclosed herein. A radiation detector can include a scintillator layer and a light-guide layer. The scintillator layer is configured to produce light upon receiving incident radiation. The light-guide layer is configured to receive light produced by the scintillator layer and either propagate the received light through the radiation detector or absorb the received light and emit light, through fluorescence, that is propagated through the radiation detector. A radiation detector can also include an outer layer partially surrounding the scintillator layer and light-guide layer. The index of refraction of the light-guide layer can be greater than the index of refraction of adjacent layers.Type: GrantFiled: June 2, 2016Date of Patent: July 11, 2017Assignee: Los Alamos National Security, LLCInventors: L. Jonathan Dowell, Dale V. Talbott, Markus P. Hehlen
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Patent number: 9574801Abstract: A method and device for cooling electronics is disclosed. The device includes a doped crystal configured to resonate at a Stark manifold resonance capable of cooling the crystal to a temperature of from about 110K to about 170K. The crystal host resonates in response to input from an excitation laser tuned to exploit the Stark manifold resonance corresponding to the cooling of the crystal.Type: GrantFiled: December 23, 2010Date of Patent: February 21, 2017Assignee: STC.UNMInventors: Denis V. Seletskiy, Richard Epstein, Markus P. Hehlen, Mansoor Sheik-Bahae
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Patent number: 9533170Abstract: Illumination of the skin by substantial, monochromatic light emitted by LEDs, produces positive therapeutic effects for the treatment of a wide variety of skin conditions. Arrays of LEDs comprising multiple emission colors are preferred light sources for these applications, however, achieving uniform and efficient illumination of a skin target area in close proximity is difficult due to the point-like emission and narrow divergence of lensed LEDs. An illumination apparatus and method, provides a LED system that produces uniform and efficient illumination by combining a well-distributed computed arrangement of each of the LED colors on the array, to enhance the spatial overlap of individual LED outputs across the target area with a diffuse secondary reflector between the LEDs having high reflectivity to further enhance illumination uniformity by allowing light to bounce between LED array panels and the skin.Type: GrantFiled: December 23, 2014Date of Patent: January 3, 2017Inventors: Catherine L. Dye, Markus P. Hehlen
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Publication number: 20160175609Abstract: Illumination of the skin by substantial, monochromatic light emitted by LEDs, produces positive therapeutic effects for the treatment of a wide variety of skin conditions. Arrays of LEDs comprising multiple emission colors are preferred light sources for these applications, however, achieving uniform and efficient illumination of a skin target area in close proximity is difficult due to the point-like emission and narrow divergence of lensed LEDs. An illumination apparatus and method, provides a LED system that produces uniform and efficient illumination by combining a well-distributed computed arrangement of each of the LED colors on the array, to enhance the spatial overlap of individual LED outputs across the target area with a diffuse secondary reflector between the LEDs having high reflectivity to further enhance illumination uniformity by allowing light to bounce between LED array panels and the skin.Type: ApplicationFiled: December 23, 2014Publication date: June 23, 2016Inventors: Catherine L. Dye, Markus P. Hehlen
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Publication number: 20100079753Abstract: An apparatus and method for obtaining Raman spectra that are suitable for continuous real-time monitoring, utilizing the basic technique of Raman spectroscopy in cooperation with wavelength-selective optical amplification are described. The invention improves the detection sensitivity of conventional Raman spectroscopy by orders of magnitude by providing strong wavelength-selective optical amplification and narrowband detection of the intense driving laser and the weak Raman signal(s), thereby essentially eliminating the driving laser signal from the detector and detection electronics. The invention is effective for both Stokes and anti-Stokes Raman lines, and either where the incident laser wavelength is fixed and the Raman spectrum is recorded by analyzing the output of the fiber amplifier with a spectrometer, or where the detection wavelength is fixed and the Raman spectrum is recorded by tuning the wavelength of the laser.Type: ApplicationFiled: September 30, 2008Publication date: April 1, 2010Applicant: The Regents of the University of CaliforniaInventor: Markus P. Hehlen
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Patent number: 7653109Abstract: An optical assembly, such as a multiple output diode laser pump source for EDFAs, is formed by pressing an optical array emitter chip against a standoff structure protruding from a submount such that the emitter chip deforms to match the curvature of the standoff structure. An IO chip is also juxtaposed against the standoff structure such that its optical receivers can receive optical energy from the emitter chip. The IO chip can provide various optical functions, and then provide an optical array output for coupling into an optical fiber array. The standoff structure preferably contacts the emitter chip over an aggregate contact area much smaller than the area by which the emitter chip overlaps the submount. The materials used for bonding the emitter chip and the IO chip to the submount are disposed in the recesses between standoffs and not on the contact surfaces of the standoff structure.Type: GrantFiled: June 25, 2007Date of Patent: January 26, 2010Assignee: Gemfire CorporationInventors: William K. Bischel, David K. Wagner, Harald Guenther, Simon J. Field, Markus P. Hehlen, Richard B. Tompane, Andrew T. Ryan, C. Geoffrey Fanning, Jim W. Li, Nina D. Morozova
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Patent number: 7263247Abstract: An integrated isolator array is provided having a plurality of waveguides fabricated in a planar optical substrate, each waveguide having input and output sections. An isolator subassembly is received within a transverse trench formed in the substrate between the input and output sections such that it intersects the optical paths of the waveguides. The isolator subassembly, which may consist of layers of Faraday rotator material sandwiched between layers of birefringent crystal material, permits the forward passage of light from the input sections to the output sections of the waveguides while preventing the backward passage of light from the output to the input sections. Each waveguide input section is preferably adapted with a mode-expanding input taper to collimate light propagating through the waveguide.Type: GrantFiled: February 11, 2002Date of Patent: August 28, 2007Assignee: Gemfire CorporationInventors: Markus P. Hehlen, William K. Bischel
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Patent number: 7235150Abstract: An optical assembly, such as a multiple output diode laser pump source for EDFAs, is formed by pressing an optical array emitter chip against a standoff structure protruding from a submount such that the emitter chip deforms to match the curvature of the standoff structure. An IO chip is also juxtaposed against the standoff structure such that its optical receivers can receive optical energy from the emitter chip. The IO chip can provide various optical functions, and then provide an optical array output for coupling into an optical fiber array. The standoff structure preferably contacts the emitter chip over an aggregate contact area much smaller than the area by which the emitter chip overlaps the submount. The materials used for bonding the emitter chip and the IO chip to the submount are disposed in the recesses between standoffs and not on the contact surfaces of the standoff structure.Type: GrantFiled: July 23, 2004Date of Patent: June 26, 2007Assignee: Gemfire CorporationInventors: William K. Bischel, David K. Wagner, Harald Guenther, Simon J. Field, Markus P. Hehlen, Richard B. Tompane, Andrew T. Ryan, C. Geoffrey Fanning, Jim W. Li, Nina D. Morozova
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Publication number: 20040105611Abstract: An optical assembly, such as a multiple output diode laser pump source for EDFAs, is formed by pressing an optical array emitter chip against a standoff structure protruding from a submount such that the emitter chip deforms to match the curvature of the standoff structure. An IO chip is also juxtaposed against the standoff structure such that its optical receivers can receive optical energy from the emitter chip. The IO chip can provide various optical functions, and then provide an optical array output for coupling into an optical fiber array. The standoff structure preferably contacts the emitter chip over an aggregate contact area much smaller than the area by which the emitter chip overlaps the submount. The materials used for bonding the emitter chip and the IO chip to the submount are disposed in the recesses between standoffs and not on the contact surfaces of the standoff structure.Type: ApplicationFiled: July 9, 2003Publication date: June 3, 2004Applicant: Gemfire CorporationInventors: William K. Bischel, David K. Wagner, Harald Guenther, Simon J. Field, Markus P. Hehlen, Richard B. Tompane, Andrew T. Ryan, C. Geoffrey Fanning, Jim Weijian Li, Nina D. Morozova
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Patent number: 6580842Abstract: A circulator array is constructed in a planar substrate by forming a plurality of waveguide pair structures, each waveguide pair structure having first and second sections respectively coupled by first and second polarization multiplexers. A nonreciprocal polarization rotation element is positioned in the optical paths of the waveguide pair structures and is configured to rotate the polarization of light passing from the second sections of the waveguides to the first sections while leaving unchanged the polarization of light passing from the first sections to the second sections, such that optical signals received at one port of the circulator structure are routed along a predetermined path to another port of the circulator structure.Type: GrantFiled: February 11, 2002Date of Patent: June 17, 2003Inventors: Markus P. Hehlen, William K. Bischel
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Patent number: 6560387Abstract: A reflective doped fiber amplifier array utilizes an integrated circulator array to effect routing of optical signals. The integrated circulator array has a plurality of waveguide pairs coupled by polarization multiplexers formed in a planar substrate, and a nonreciprocal polarization rotation element positioned between sections of the waveguide pairs. Pump light is coupled into and out of the doped fibers by wavelength-selective reflectors.Type: GrantFiled: February 11, 2002Date of Patent: May 6, 2003Inventors: Markus P. Hehlen, William K. Bischel
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Publication number: 20020110328Abstract: An optical assembly, such as a multiple output diode laser pump source for EDFAs, is formed by pressing an optical array emitter chip against a standoff structure protruding from a submount such that the emitter chip deforms to match the curvature of the standoff structure. An IO chip is also juxtaposed against the standoff structure such that its optical receivers can receive optical energy from the emitter chip. The IO chip can provide various optical functions, and then provide an optical array output for coupling into an optical fiber array. The standoff structure preferably contacts the emitter chip over an aggregate contact area much smaller than the area by which the emitter chip overlaps the submount. The materials used for bonding the emitter chip and the IO chip to the submount are disposed in the recesses between standoffs and not on the contact surfaces of the standoff structure.Type: ApplicationFiled: February 14, 2001Publication date: August 15, 2002Inventors: William K. Bischel, David K. Wagner, Harald Guenther, Simon J. Field, Markus P. Hehlen, Richard B Tompane, Andrew T. Ryan, C. Geoffrey Fanning, Jim Weijian Li, Nina D. Morozova
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Publication number: 20020003928Abstract: An integrated optical microstructure includes a substrate carrying an optical waveguide and supporting a medium disposed to receive optical energy from the waveguide. The medium includes an optical re-radiator such as a phosphor, which re-radiates optical energy in response to optical energy received from the waveguide. The structure further includes a reflector disposed to redirect some of the input optical energy emanating from the medium back into the medium, to achieve spatial confinement of the input light delivered by the input waveguide. The structure can thereby increase the efficiency of the light conversion processes of re-radiating materials. An aperture in the reflector permits optical energy emitted by the re-radiator to emerge from the structure and to propagate in a preferred direction, such as toward a viewer or sensor.Type: ApplicationFiled: December 15, 2000Publication date: January 10, 2002Applicant: Gemfire CorporationInventors: William K. Bischel, David A.G. Deacon, Nigel J. Cockroft, Markus P. Hehlen, David K. Wagner, Richard B. Tompane, Simon J. Field
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Patent number: 6208791Abstract: An integrated optical microstructure includes a substrate carrying an optical waveguide and supporting a medium disposed to receive optical energy from the waveguide. The medium includes an optical re-radiator such as a phosphor, which reradiates optical energy in response to optical energy received from the waveguide. The structure further includes a reflector disposed to redirect some of the input optical energy emanating from the medium back into the medium, to achieve spatial confinement of the input light delivered by the input waveguide. The structure can thereby increase the efficiency of the light conversion processes of re-radiating materials. An aperture in the reflector permits optical energy emitted by the re-radiator to emerge from the structure and to propagate in a preferred direction, such as toward a viewer or sensor.Type: GrantFiled: April 19, 1999Date of Patent: March 27, 2001Assignee: Gemfire CorporationInventors: William K. Bischel, David A.G. Deacon, Nigel J. Cockroft, Markus P. Hehlen, David K. Wagner, Richard B. Tompane, Simon J. Field