Patents Assigned to Excelitas Technologies Corp.
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Patent number: 11749962Abstract: An optically pumped tunable VCSEL swept source module has a VCSEL and a pump, which produces light to pump the VSCEL, wherein the pump is geometrically isolated from the VCSEL. In different embodiments, the pump is geometrically isolated by defocusing light from the pump in front of the VCSEL, behind the VCSEL, and/or by coupling the light from the pump at an angle with respect to the VCSEL. In the last case, angle is usually less than 88 degrees. There are further strategies for attacking pump noise problems. Pump feedback can be reduced through (1) Faraday isolation and (2) geometric isolation. Single frequency pump lasers (Distributed feedback lasers (DFB), distributed Bragg reflector lasers (DBR), Fabry-Perot (FP) lasers, discrete mode lasers, volume Bragg grating (VBG) stabilized lasers can eliminate wavelength jitter and amplitude noise that accompanies mode hopping.Type: GrantFiled: January 13, 2021Date of Patent: September 5, 2023Assignee: Excelitas Technologies Corp.Inventors: Bartley C. Johnson, Walid A. Atia, Peter S. Whitney, Mark E. Kuznetsov, Edward J. Mallon
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Patent number: 11699894Abstract: A MEMS tunable VCSEL includes a membrane device having a mirror and a distal-side electrostatic cavity for displacing the mirror to increase a size of an optical cavity. A VCSEL device includes an active region for amplifying light. Then, one or more proximal-side electrostatic cavities are defined between the VCSEL device and the membrane device and used to displace the mirror to decrease a size of an optical cavity.Type: GrantFiled: August 16, 2021Date of Patent: July 11, 2023Assignee: Excelitas Technologies Corp.Inventors: James W. Getz, Peter S. Whitney
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Publication number: 20230208107Abstract: A vertical cavity surface emitting laser (VCSEL) has a shortened overall laser cavity by combining the gain section with a distributed Bragg reflector (DBR). The overall cavity length can be contracted by placing gain structures inside the DBR. This generally applies to a number of semiconductor material systems and wavelength bands, but this scheme is very well suited to the AlGaAs/GaAs material system with strained InGaAs quantum wells as a gain medium, for example.Type: ApplicationFiled: December 20, 2022Publication date: June 29, 2023Applicant: Excelitas Technologies Corp.Inventors: Bartley C. Johnson, Mark E. Kuznetsov, Peter S. Whitney
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Publication number: 20230046578Abstract: A MEMS tunable VCSEL includes a membrane device having a mirror and a distal-side electrostatic cavity for displacing the mirror to increase a size of an optical cavity. A VCSEL device includes an active region for amplifying light. Then, a proximal-side electrostatic cavity is defined between the VCSEL device and the membrane device is used to displace the mirror to decrease a size of an optical cavity.Type: ApplicationFiled: June 28, 2022Publication date: February 16, 2023Applicant: Excelitas Technologies Corp.Inventors: James W. Getz, Peter S. Whitney
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Patent number: 11581164Abstract: Provided herein are deposition systems utilizing coated grids in an ion deposition process which provide more predictable erosion of the coating rather than erosion of the grid itself. Further, coatings may be utilized in which the coating material does not act as a contaminant to the deposition process, thereby eliminating contamination of the sample surface due to deposition of unwanted grid material. Also provided are methods of refurbishing a coated grid by periodically replacing the coating material thus protecting the grid itself and allowing a grid to be used indefinitely.Type: GrantFiled: March 29, 2018Date of Patent: February 14, 2023Assignee: Excelitas Technologies Corp.Inventors: Eric Baltz, Sam Richman, Nelson C. Turner, III
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Patent number: 11431151Abstract: A MEMS tunable VCSEL includes a membrane device having a mirror and a distal-side electrostatic cavity for displacing the mirror to increase a size of an optical cavity. A VCSEL device includes an active region for amplifying light. Then, a proximal-side electrostatic cavity is defined between the VCSEL device and the membrane device is used to displace the mirror to decrease a size of an optical cavity.Type: GrantFiled: November 5, 2019Date of Patent: August 30, 2022Assignee: Excelitas Technologies Corp.Inventors: James W. Getz, Peter S. Whitney
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Patent number: 11139635Abstract: Quantum well designs for tunable VCSELs are disclosed that are tolerant of the wavelength shift. Specifically, the active region has even number of substantially uniformly spaced (ΒΌ of the center wavelength in the semiconducting material) quantum wells.Type: GrantFiled: June 19, 2019Date of Patent: October 5, 2021Assignee: Excelitas Technologies Corp.Inventors: Bartley C. Johnson, Mark E. Kuznetsov, Walid A. Atia, Peter S. Whitney
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Patent number: 11092426Abstract: Optical coherence tomography (OCT) probe and system designs are disclosed that minimize the effects of mechanical movement and strain to the probe to the OCT analysis. It also concerns optical designs that are robust against noise from the OCT laser source. Also integrated OCT system-probes are included that yield compact and robust electro-opto-mechanical systems along with polarization sensitive OCT systems.Type: GrantFiled: September 25, 2017Date of Patent: August 17, 2021Assignee: Excelitas Technologies Corp.Inventors: Bartley C. Johnson, Dale C. Flanders
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Patent number: 10985546Abstract: A circuit including a source, a load, and an isolation circuit for controllably isolating the load from the source. The isolation circuit is disposed between the source and the load. The isolation circuit includes at least one insulated-gate bipolar transistor (IGBT) and at least one gate turn-off thyristor (GTO) in parallel with the insulated-gate bipolar transistor. When no fault condition exists, the GTO is configured to be ON to couple the load to the source. When a fault condition exists, the at least one IGBT is configured to turn ON. After the at least one IGBT turns ON, the at least one GTO is configured to turn OFF. After a predetermined amount of time, reflecting the post fabrication alteration to the GTO's minority carrier lifetime (e.g. electron irradiation), after the at least one GTO turns OFF, the at least one IGBT is configured to turn OFF.Type: GrantFiled: January 20, 2019Date of Patent: April 20, 2021Assignee: Excelitas Technologies Corp.Inventors: John E. Waldron, Kenneth Brandmier, James K. Azotea
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Patent number: 10951009Abstract: A design and method for introducing asymmetric crystal strain to control polarization in a tunable VCSEL, either optically or electrically pumped. The invention is especially relevant to wafer- or die-bonded tunable VCSELs. Then, mechanical stress is applied to the half VCSEL device by asymmetric arrangement of metal bond pads.Type: GrantFiled: May 10, 2019Date of Patent: March 16, 2021Assignee: Excelitas Technologies Corp.Inventors: Bartley C. Johnson, Mark R. Malonson, Walid A. Atia, Mark E. Kuznetsov, James W. Getz, Peter S. Whitney
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Patent number: 10951007Abstract: An optically pumped tunable VCSEL swept source module has a VCSEL and a pump, which produces light to pump the VSCEL, wherein the pump is geometrically isolated from the VCSEL. In different embodiments, the pump is geometrically isolated by defocusing light from the pump in front of the VCSEL, behind the VCSEL, and/or by coupling the light from the pump at an angle with respect to the VCSEL. In the last case, angle is usually less than 88 degrees. There are further strategies for attacking pump noise problems. Pump feedback can be reduced through (1) Faraday isolation and (2) geometric isolation. Single frequency pump lasers (Distributed feedback lasers (DFB), distributed Bragg reflector lasers (DBR), Fabry-Perot (FP) lasers, discrete mode lasers, volume Bragg grating (VBG) stabilized lasers can eliminate wavelength jitter and amplitude noise that accompanies mode hopping.Type: GrantFiled: May 10, 2019Date of Patent: March 16, 2021Assignee: EXCELITAS TECHNOLOGIES CORP.Inventors: Bartley C. Johnson, Walid A. Atia, Peter S. Whitney, Mark E. Kuznetsov, Edward J. Mallon
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Patent number: 10544921Abstract: A luminaire includes multiple light emitting cells. Each light emitting cell has a light source, and a focus-tunable lens (e.g., a liquid lens) associated with the light source. Each respective one of the light emitting cells is independently controllable relative to the one or more other light emitting cells. In a typical implementation, the control of each light emitting cell may involve, for example, controlling a surface of liquid in the corresponding liquid lens.Type: GrantFiled: May 2, 2017Date of Patent: January 28, 2020Assignee: Excelitas Technologies Corp.Inventor: Wei Li
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Patent number: 10504714Abstract: The invention is directed to a sealed high intensity illumination device configured to receive a laser beam from a laser light source. A sealed chamber is configured to contain an ionizable medium. The chamber includes a reflective chamber interior surface having a first parabolic contour and parabolic focal region, a second parabolic contour and parabolic focal region, an ingress surface configured to admit the laser beam into the chamber, and an egress surface configured to emit high intensity light from the chamber. The first parabolic contour is configured to reflect light from the first parabolic focal region to the second parabolic contour, and the second parabolic contour is configured to reflect light from the first parabolic contour to the second parabolic focal region.Type: GrantFiled: December 5, 2018Date of Patent: December 10, 2019Assignee: Excelitas Technologies Corp.Inventor: Rudi Blondia
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Patent number: 10497555Abstract: A sealed high intensity illumination device configured to receive a laser beam from a laser light source and method for making the same are disclosed. The device includes a sealed cylindrical chamber configured to contain an ionizable medium. The chamber has a cylindrical wall, with an ingress and an egress window disposed opposite the ingress window. A tube insert is disposed within the chamber formed of an insulating material. The insert is configured to receive the laser beam within the insert inner diameter.Type: GrantFiled: June 21, 2018Date of Patent: December 3, 2019Assignee: Excelitas Technologies Corp.Inventor: Rudi Blondia
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Patent number: 10186416Abstract: An apparatus and a method for operating a sealed high intensity illumination lamp configured to receive a laser beam from a laser light source. The lamp includes a sealed chamber configured to contain an ionizable medium having a plasma sustaining region, and a plasma ignition region. A high intensity light egress window emits high intensity light from the chamber. A substantially flat ingress window located within a wall of the chamber admits the laser beam into the chamber. The lamp includes means for controlled increasing and decreasing a pressure level within the sealed chamber while the lamp is producing the high intensity illumination.Type: GrantFiled: October 25, 2016Date of Patent: January 22, 2019Assignee: Excelitas Technologies Corp.Inventor: Rudi Blondia
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Patent number: 10186414Abstract: The invention is directed to a sealed high intensity illumination device configured to receive a laser beam from a laser light source. A sealed chamber is configured to contain an ionizable medium. The chamber includes a reflective chamber interior surface having a first parabolic contour and parabolic focal region, a second parabolic contour and parabolic focal region, and an interface surface. An ingress surface is disposed within the interface surface configured to admit the laser beam into the chamber, and an egress surface disposed within the interface surface configured to emit high intensity light from the chamber. The first parabolic contour is configured to reflect light from the first parabolic focal region to the second parabolic contour, and the second parabolic contour is configured to reflect light from the first parabolic contour to the second parabolic focal region.Type: GrantFiled: May 25, 2017Date of Patent: January 22, 2019Assignee: Excelitas Technologies Corp.Inventor: Rudi Blondia
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Patent number: 10166402Abstract: A method and device are presented for providing patient safe light to a wound. The device includes a radiation source producing flora lethal radiation wavelengths, a radiation conduit detachably optically coupled to the radiation source, and a patch remotely located from the radiation source configured to at least partially conform to a surface contour of the wound. The patch includes a flexible panel formed of a radiation transmitting material able to withstand sterilization, including at least one surface with a disturbed surface area configured to emit radiation upon the wound.Type: GrantFiled: May 16, 2013Date of Patent: January 1, 2019Assignee: Excelitas Technologies Corp.Inventors: Kevin Brennan, Thomas Papanek
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Patent number: 10161725Abstract: An initiator including a housing adapted to be received in an igniter or rocket motor, at least one charge at a distal end of the housing, an electro-explosive device behind the charge for detonating the charge when subject to a voltage HV, and a pressure bulkhead behind the electro-explosive device. An electronic subsystem in the housing is connected to the electro-explosive device through the bulkhead and includes a lead for providing the voltage HV to the electro-explosive device to initiate it, and a switch in the lead which does not conduct if errant voltages are present on the lead to prevent initiation of the electro-explosive device until the correct voltage HV is present.Type: GrantFiled: September 4, 2018Date of Patent: December 25, 2018Assignee: Excelitas Technologies Corp.Inventors: Barry Neyer, Daniel Raymond Knick, Paul Thomas Moore, Robert Tomasoski
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Patent number: 10109473Abstract: A laser sustained plasma lamp includes a mechanically sealed pressurized chamber assembly (330) configured to contain an ionizable material. The chamber assembly is bounded by a chamber tube (310), an ingress sapphire window (340), a first metal seal ring (320) configured to seal against the chamber tube ingress end and the ingress sapphire window, an egress sapphire window (342), and a second metal seal ring (322) configured to seal against the chamber tube egress end and the egress sapphire window. A mechanical clamping structure (350, 355) external to the chamber assembly is configured to clamp across at least a portion of the ingress sapphire window and the egress sapphire window. The ingress sapphire window and the egress sapphire window are not connected to the chamber tube via welding and/or brazing.Type: GrantFiled: January 26, 2018Date of Patent: October 23, 2018Assignee: Excelitas Technologies Corp.Inventors: Rudi Blondia, Douglas A. Doughty, John Kiss, Roy D. Roberts
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Patent number: 10057508Abstract: An illumination device with an integrated thermal imaging sensor and method for using the same are disclosed. The device includes a solid state illumination source, and a thermal imager comprising a multi-pixel heat sensing device. A controller is configured to control the thermal imager, and a power source is configured to supply power to the illumination source, the thermal imager, and the controller.Type: GrantFiled: June 5, 2014Date of Patent: August 21, 2018Assignee: Excelitas Technologies Corp.Inventors: Joel Falcone, Rudi Blondia, Arthur John Barlow