Patents by Inventor Vernon A. Seguin
Vernon A. Seguin 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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Publication number: 20230155342Abstract: A Q-switched gas laser apparatus with bivariate pulse equalization includes a gas laser, a sensor, and an electronic circuit. A Q-switch that switches the laser resonator between high-loss and low-loss states to generate a pulsed laser beam. The sensor obtains a measurement of the pulsed laser beam indicative of the laser pulse energy. The electronic circuitry operates the Q-switch to (a) repeatedly switch the laser resonator between the high-loss and low-loss states to set a repetition rate of laser pulses of the pulsed laser beam, (b) adjust a loss level of the low-loss state, based on the pulse energy measurement, to achieve a target laser pulse energy, and (c) adjust a duration of the low-loss state to achieve a target laser pulse duration. By adjusting both pulse energy and duration, uniform pulse energy and, if desired, uniform pulse duration are achieved over a wide range of repetition rates.Type: ApplicationFiled: October 28, 2022Publication date: May 18, 2023Applicant: Coherent, Inc.Inventors: Vernon SEGUIN, David P. SCHMELZER, Joel FONTANELLA, Peter ROSENTHAL
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Patent number: 11336070Abstract: A carbon dioxide gas-discharge slab-laser is assembled in a laser-housing. The laser-housing is formed from a hollow extrusion. An interior surface of the extrusion provides a ground electrode of the laser. Another live electrode is located within the extrusion, electrically insulated from and parallel to the ground electrode, forming a discharge-gap of the slab-laser. The electrodes are spaced apart by parallel ceramic strips. Neither the extrusion, nor the live electrode, include fluid coolant channels. The laser-housing is cooled by fluid-cooled plates attached to the outside thereof.Type: GrantFiled: April 2, 2020Date of Patent: May 17, 2022Assignee: Coherent, Inc.Inventors: Eric R. Mueller, Vernon A. Seguin, Christian Shackleton
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Publication number: 20200235542Abstract: A carbon dioxide gas-discharge slab-laser is assembled in a laser-housing. The laser-housing is formed from a hollow extrusion. An interior surface of the extrusion provides a ground electrode of the laser. Another live electrode is located within the extrusion, electrically insulated from and parallel to the ground electrode, forming a discharge-gap of the slab-laser. The electrodes are spaced apart by parallel ceramic strips. Neither the extrusion, nor the live electrode, include fluid coolant channels. The laser-housing is cooled by fluid-cooled plates attached to the outside thereof.Type: ApplicationFiled: April 2, 2020Publication date: July 23, 2020Applicant: Coherent, Inc.Inventors: Eric R. MUELLER, Vernon A. SEGUIN, Christian SHACKLETON
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Patent number: 10644474Abstract: A carbon dioxide gas-discharge slab-laser is assembled in a laser-housing. The laser-housing is formed from a hollow extrusion. An interior surface of the extrusion provides a ground electrode of the laser. Another live electrode is located within the extrusion, electrically insulated from and parallel to the ground electrode, forming a discharge-gap of the slab-laser. The electrodes are spaced apart by parallel ceramic strips. Neither the extrusion, nor the live electrode, include any direct fluid-cooling means. The laser-housing is cooled by fluid-cooled plates attached to the outside thereof.Type: GrantFiled: March 7, 2018Date of Patent: May 5, 2020Assignee: Coherent, Inc.Inventors: Eric R. Mueller, Vernon A. Seguin, Christian Shackleton
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Publication number: 20190280448Abstract: A carbon dioxide gas-discharge slab-laser is assembled in a laser-housing. The laser-housing is formed from a hollow extrusion. An interior surface of the extrusion provides a ground electrode of the laser. Another live electrode is located within the extrusion, electrically insulated from and parallel to the ground electrode, forming a discharge-gap of the slab-laser. The electrodes are spaced apart by parallel ceramic strips. Neither the extrusion, nor the live electrode, include any direct fluid-cooling means. The laser-housing is cooled by fluid-cooled plates attached to the outside thereof.Type: ApplicationFiled: March 7, 2018Publication date: September 12, 2019Inventors: Eric R. MUELLER, Vernon A. SEGUIN, Christian SHACKLETON
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Patent number: 8290017Abstract: A carbon-dioxide (CO2) gas-discharge slab laser includes elongated discharge-electrodes in a sealed enclosure. Radio Frequency (RF) power is supplied to the electrodes via an impedance matching network and a co-axial electrical low inductance transmission line feed-through sealed to the enclosure. The feed-trough includes two spring contacts which are configured to be spring compression push-fit in grooves in edges of the discharge-electrodes. A central conductor of the feed-through is fluid cooled. A capacitor of the impedance matching network is assembled on the central conductor as an integral part of the feed-trough.Type: GrantFiled: September 19, 2011Date of Patent: October 16, 2012Assignee: Coherent, Inc.Inventors: Leon A. Newman, Vernon A. Seguin, Lanny Laughman, Adrian Papanide
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Patent number: 8265116Abstract: A carbon-dioxide (CO2) gas-discharge slab laser includes elongated discharge-electrodes in a sealed enclosure. Radio Frequency (RF) power is supplied to the electrodes via an impedance matching network and a co-axial electrical low inductance transmission line feed-through sealed to the enclosure. The feed-trough includes two spring contacts which are configured to be spring compression push-fit in grooves in edges of the discharge-electrodes. A central conductor of the feed-through is fluid cooled. A capacitor of the impedance matching network is assembled on the central conductor as an integral part of the feed-trough.Type: GrantFiled: June 9, 2009Date of Patent: September 11, 2012Assignee: Coherent, Inc.Inventors: Leon A. Newman, Vernon A. Seguin, Lanny Laughman, Adrian Papanide
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Publication number: 20120033703Abstract: A carbon-dioxide (CO2) gas-discharge slab laser includes elongated discharge-electrodes in a sealed enclosure. Radio Frequency (RF) power is supplied to the electrodes via an impedance matching network and a co-axial electrical low inductance transmission line feed-through sealed to the enclosure. The feed-trough includes two spring contacts which are configured to be spring compression push-fit in grooves in edges of the discharge-electrodes. A central conductor of the feed-through is fluid cooled. A capacitor of the impedance matching network is assembled on the central conductor as an integral part of the feed-trough.Type: ApplicationFiled: September 19, 2011Publication date: February 9, 2012Applicant: Coherent, Inc.Inventors: Leon A. NEWMAN, Vernon A. Seguin, Lanny Laughman, Adrian Papanide
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Patent number: 8050306Abstract: A pulsed CO2 laser is Q-switched by an intracavity acousto-optic (AO) Q-switch including an AO material transparent at a fundamental wavelength of the laser. In one example the AO material is germanium.Type: GrantFiled: February 3, 2011Date of Patent: November 1, 2011Assignee: Coherent, Inc.Inventors: Vernon A. Seguin, Peter P. Chenausky
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Patent number: 7965757Abstract: A laser mirror assembly is disclosed with improved pointing stability. An elongated mirror includes a concave reflecting portion. A pair of elongated planar portions extend parallel to the concave reflecting portion on either side thereof. The planar portions are stepped down from the reflecting portion. The mirror is formed from copper. A pair of stainless steel strips are connected to planar portions. The bimetallic effect between the copper mirror and the stainless steel strips operates to counteract the warping of the mirror due to differential heating effects which arise during operation. In an alternate embodiment, a pair of aluminum strips are mounted on the rear surface of the mirror.Type: GrantFiled: December 31, 2009Date of Patent: June 21, 2011Assignee: Coherent, Inc.Inventors: Leon A. Newman, Vernon A. Seguin, Lanny Laughman, Adrian Papanide
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Publication number: 20110122897Abstract: A pulsed CO2 laser is Q-switched by an intracavity acousto-optic (AO) Q-switch including an AO material transparent at a fundamental wavelength of the laser. In one example the AO material is germanium.Type: ApplicationFiled: February 3, 2011Publication date: May 26, 2011Applicant: Coherent, Inc.Inventors: Vernon A. Seguin, Peter P. Chenausky
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Patent number: 7903699Abstract: A pulsed CO2 laser is Q-switched by an intracavity acousto-optic (AO) Q-switch including an AO material transparent at a fundamental wavelength of the laser. In one example the AO material is germanium.Type: GrantFiled: May 1, 2008Date of Patent: March 8, 2011Assignee: Coherent, Inc.Inventors: Vernon A. Seguin, Peter P. Chenausky
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Patent number: 7756186Abstract: Through the use of a relatively inexpensive third mirror on a novel folded hybrid unstable resonator configuration, the optimum output coupling for a given laser design can be explored quickly and easily with a minimum of intracavity mirror alignment. No changes in either the radii of curvature of the three cavity optics or their spacing are required for this exploration. In addition to providing techniques for purposefully and systematically introducing mirror edge effects or avoiding edges effects altogether, the invention provides that output beams of different width can be advantageously explored in a relatively simple and straightforward manner. The invention provides that higher geometric magnification cavity designs may be made compatible with low diffraction output coupling in a configuration that uses only three totally reflecting optics.Type: GrantFiled: February 19, 2008Date of Patent: July 13, 2010Assignee: Coherent, Inc.Inventors: Peter P. Chenausky, Lanny Laughman, Eric R. Mueller, Leon A. Newman, Vernon A. Seguin, Christian J. Shackleton
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Publication number: 20100118901Abstract: A carbon-dioxide (CO2) gas-discharge slab laser includes elongated discharge-electrodes in a sealed enclosure. Radio Frequency (RF) power is supplied to the electrodes via an impedance matching network and a co-axial electrical low inductance transmission line feed-through sealed to the enclosure. The feed-trough includes two spring contacts which are configured to be spring compression push-fit in grooves in edges of the discharge-electrodes. A central conductor of the feed-through is fluid cooled. A capacitor of the impedance matching network is assembled on the central conductor as an integral part of the feed-trough.Type: ApplicationFiled: June 9, 2009Publication date: May 13, 2010Applicant: Coherent, Inc.Inventors: Leon A. Newman, Vernon A. Seguin, Lanny Laughman, Adrian Papanide
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Publication number: 20100103974Abstract: A laser mirror assembly is disclosed with improved pointing stability. An elongated mirror includes a concave reflecting portion. A pair of elongated planar portions extend parallel to the concave reflecting portion on either side thereof. The planar portions are stepped down from the reflecting portion. The mirror is formed from copper. A pair of stainless steel strips are connected to planar portions. The bimetallic effect between the copper mirror and the stainless steel strips operates to counteract the warping of the mirror due to differential heating effects which arise during operation. In an alternate embodiment, a pair of aluminum strips are mounted on the rear surface of the mirror.Type: ApplicationFiled: December 31, 2009Publication date: April 29, 2010Applicant: Coherent, Inc.Inventors: Leon A. NEWMAN, Vernon A. Seguin, Lanny Laughman, Adrian Papanide
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Patent number: 7664159Abstract: A laser mirror assembly is disclosed with improved pointing stability. An elongated mirror includes a concave reflecting portion. A pair of elongated planar portions extend parallel to the concave reflecting portion on either side thereof. The planar portions are stepped down from the reflecting portion. The mirror is formed from copper. A pair of stainless steel strips are connected to planar portions. The bimetallic effect between the copper mirror and the stainless steel strips operates to counteract the warping of the mirror due to differential heating effects which arise during operation. In an alternate embodiment, a pair of aluminum strips are mounted on the rear surface of the mirror.Type: GrantFiled: July 7, 2008Date of Patent: February 16, 2010Assignee: Coherent, Inc.Inventors: Leon A. Newman, Vernon A. Seguin, Lanny Laughman, Adrian Papanide
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Publication number: 20090232167Abstract: A pulsed CO2 laser is Q-switched by an intracavity acousto-optic (AO) Q-switch including an AO material transparent at a fundamental wavelength of the laser. In one example the AO material is germanium.Type: ApplicationFiled: May 1, 2008Publication date: September 17, 2009Inventors: VERNON A. SEGUIN, Peter P. Chenausky
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Patent number: 7558308Abstract: A low inductance, hermetically sealed, RF shielded feed-through is provided for exciting low impedance discharges associated with high power CO2 slab lasers. The feed-through mechanically obtains RF contact, preferably, at the center of the length of the electrodes that are inserted within the long laser housing, thereby making it easier to obtain a uniform electric field distribution along the length of the electrodes.Type: GrantFiled: February 14, 2008Date of Patent: July 7, 2009Assignee: Coherent, Inc.Inventors: Christian J. Shackleton, Thomas J. Hennessey, Jr., Vernon Seguin, Frederick W. Hauer
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Publication number: 20090034577Abstract: A laser mirror assembly is disclosed with improved pointing stability. An elongated mirror includes a concave reflecting portion. A pair of elongated planar portions extend parallel to the concave reflecting portion on either side thereof. The planar portions are stepped down from the reflecting portion. The mirror is formed from copper. A pair of stainless steel strips are connected to planar portions. The bimetallic effect between the copper mirror and the stainless steel strips operates to counteract the warping of the mirror due to differential heating effects which arise during operation. In an alternate embodiment, a pair of aluminum strips are mounted on the rear surface of the mirror.Type: ApplicationFiled: July 7, 2008Publication date: February 5, 2009Inventors: Leon A. Newman, Vernon A. Seguin, Lanny Laughman, Adrian Papanide
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Patent number: 7453918Abstract: An improved laser system includes a sealed-off, RF excited, diffusion cooled, high pressure, short pulsed, high peak power waveguide and slab CO2 laser that avoids problems typically associated with obtaining a diffused discharge at high gas pressures, without arcing and without corona, while maintaining the unsaturated gain and gas temperature experienced at low pressures and scaling to higher pressures. Such a system has a long operating life-time, and is capable of operation at high gas pressures to obtain relative fast rise and fall time pulses. The system emits relatively short pulse widths, with pulse energies up to and exceeding 30 mJ, with reasonably high pulse repetition rates. The system also has a low pulsed RF power duty cycle, thereby enabling the generation of high peak power pulses, as well as reasonable average power and reasonably high peak powers.Type: GrantFiled: July 12, 2006Date of Patent: November 18, 2008Assignee: Coherent, Inc.Inventors: Lanny Laughman, Vernon Seguin, Peter P. Chenausky, Robert Henschke, Eric R. Mueller