Patents by Inventor Cristian Stagarescu
Cristian Stagarescu 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: 20240094484Abstract: A system and method for alignment. In some embodiments, the method includes measuring a first offset, the first offset being an offset along a first direction between a first alignment mark and a second alignment mark, the first alignment mark being an alignment mark on a first edge of a source die, the second alignment mark being an alignment mark on a target wafer, and the first direction being substantially parallel to the first edge of the source die.Type: ApplicationFiled: December 17, 2021Publication date: March 21, 2024Inventors: Chia-Te CHOU, Albert BENZONI, Michael LEE, Cristian STAGARESCU, William VIS, Melissa ZIEBELL
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Publication number: 20230261432Abstract: Techniques for efficient alignment of a semiconductor laser in a Photonic Integrated Circuit (PIC) are disclosed. In some embodiments, a photonic integrated circuit (PIC) may include a semiconductor laser that includes a laser mating surface, and a substrate that includes a substrate mating surface. A shape of the laser mating surface and a shape of the substrate mating surface may be configured to align the semiconductor laser with the substrate in three dimensions.Type: ApplicationFiled: April 26, 2023Publication date: August 17, 2023Inventors: Roe HEMENWAY, Cristian STAGARESCU, Daniel MEEROVICH, Malcolm R. GREEN, Wolfgang PARZ, Jichi MA, Richard Robert GRZYBOWSKI, Nathan BICKEL
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Patent number: 11658459Abstract: Techniques for efficient alignment of a semiconductor laser in a Photonic Integrated Circuit (PIC) are disclosed. In some embodiments, a photonic integrated circuit (PIC) may include a semiconductor laser that includes a laser mating surface, and a substrate that includes a substrate mating surface. A shape of the laser mating surface and a shape of the substrate mating surface may be configured to align the semiconductor laser with the substrate in three dimensions.Type: GrantFiled: July 16, 2018Date of Patent: May 23, 2023Assignee: MACOM Technology Solutions Holdings, Inc.Inventors: Roe Hemenway, Cristian Stagarescu, Daniel Meerovich, Malcolm R. Green, Wolfgang Parz, Jichi Ma, Richard Robert Grzybowski, Nathan Bickel
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Publication number: 20190148911Abstract: Techniques for providing curved facet semiconductor lasers. are disclosed. In one particular embodiment, the techniques may be realized as a semiconductor laser, comprising a waveguide, wherein the waveguide includes a facet formed at an edge of the semiconductor laser, and the facet has a curvature.Type: ApplicationFiled: November 15, 2018Publication date: May 16, 2019Applicant: MACOM Technology Solutions Holdings, Inc.Inventors: Youxi LIN, Wolfgang PARZ, Nathan BICKEL, Cristian STAGARESCU
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Publication number: 20180342851Abstract: Techniques for efficient alignment of a semiconductor laser in a Photonic Integrated Circuit (PIC) are disclosed. In some embodiments, a photonic integrated circuit (PIC) may include a semiconductor laser that includes a laser mating surface, and a substrate that includes a substrate mating surface. A shape of the laser mating surface and a shape of the substrate mating surface may be configured to align the semiconductor laser with the substrate in three dimensions.Type: ApplicationFiled: July 16, 2018Publication date: November 29, 2018Applicant: MACOM Technology Solutions Holdings, Inc.Inventors: Roe HEMENWAY, Cristian STAGARESCU, Daniel MEEROVICH, Malcolm R. GREEN, Wolfgang PARZ, Jichi MA, Richard Robert GRZYBOWSKI, Nathan BICKEL
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Publication number: 20180307063Abstract: Embodiments of an optical modulator device are described. An example optical modulator includes a ridge laser configured to emit light, a ridge waveguide configured to transition between a transparent state and an absorbing state, and a waveguide tap formed between the ridge laser and the ridge waveguide. The waveguide tap is configured to optically couple a fraction of light generated in the ridge laser to the ridge waveguide. In the transparent state of the ridge waveguide, the ridge waveguide is configured to output the fraction of light for interference with light emitted from the ridge laser. In the absorbing state of the ridge waveguide, the ridge waveguide is configured to absorb the fraction of light. Depending upon whether the fraction of light is output from the ridge waveguide for interference, the output power of the laser seen at the far-field of the optical modulator can be modulated for data communications.Type: ApplicationFiled: April 17, 2018Publication date: October 25, 2018Inventor: Cristian Stagarescu
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Patent number: 10063028Abstract: Unidirectionality of lasers is enhanced by forming one or more etched gaps in the laser cavity. The gaps may be provided in any segment of a laser, such as any leg of a ring laser, or in one leg of a V-shaped laser. A Brewster angle facet at the distal end of a photonic device coupled to the laser reduces back-reflection into the laser cavity. A distributed Bragg reflector is used at the output of a laser to enhance the side-mode suppression ratio of the laser.Type: GrantFiled: October 30, 2014Date of Patent: August 28, 2018Assignee: MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.Inventors: Alex A Behfar, Alfred T Schremer, Jr., Cristian Stagarescu
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Patent number: 10044168Abstract: A laser chip having a substrate, an epitaxial structure on the substrate, the epitaxial structure including an active region and the active region generating light, a waveguide formed in the epitaxial structure extending in a first direction, the waveguide having a front etched facet and a back etched facet that define an edge-emitting laser, and a first recessed region formed in the epitaxial structure, the first recessed region being arranged at a distance from the waveguide and having an opening adjacent to the back etched facet, the first recessed region facilitating testing of an adjacent laser chip prior to singulation of the laser chip.Type: GrantFiled: December 1, 2017Date of Patent: August 7, 2018Assignee: MACON TECHNOLOGY SOLUTIONS HOLDINGS, INC.Inventors: Alex A. Behfar, Malcolm R. Green, Cristian Stagarescu
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Patent number: 10038298Abstract: A laser chip having a substrate, an epitaxial structure on the substrate, the epitaxial structure including an active region and the active region generating light, a waveguide formed in the epitaxial structure extending in a first direction, the waveguide having a front etched facet and a back etched facet that define an edge-emitting laser, and a first recessed region formed in the epitaxial structure, the first recessed region being arranged at a distance from the waveguide and having an opening adjacent to the back etched facet, the first recessed region facilitating testing of an adjacent laser chip prior to singulation of the laser chip.Type: GrantFiled: December 1, 2017Date of Patent: July 31, 2018Assignee: MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.Inventors: Alex A. Behfar, Malcolm R. Green, Cristian Stagarescu
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Patent number: 10027087Abstract: Techniques for efficient alignment of a semiconductor laser in a Photonic Integrated Circuit (PIC) are disclosed. In some embodiments, a photonic integrated circuit (PIC) may include a semiconductor laser that includes a laser mating surface, and a substrate that includes a substrate mating surface. A shape of the laser mating surface and a shape of the substrate mating surface may be configured to align the semiconductor laser with the substrate in three dimensions.Type: GrantFiled: February 17, 2017Date of Patent: July 17, 2018Assignee: MACOM Technology Solutions Holdings, Inc.Inventors: Roe Hemenway, Cristian Stagarescu, Daniel Meerovich, Malcolm R. Green, Wolfgang Parz, Jichi Ma, Richard Robert Grzybowski, Nathan Bickel
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Publication number: 20180109070Abstract: A laser chip having a substrate, an epitaxial structure on the substrate, the epitaxial structure including an active region and the active region generating light, a waveguide formed in the epitaxial structure extending in a first direction, the waveguide having a front etched facet and a back etched facet that define an edge-emitting laser, and a first recessed region formed in the epitaxial structure, the first recessed region being arranged at a distance from the waveguide and having an opening adjacent to the back etched facet, the first recessed region facilitating testing of an adjacent laser chip prior to singulation of the laser chip.Type: ApplicationFiled: December 1, 2017Publication date: April 19, 2018Applicant: MACOM Technology Solutions Holdings, Inc.Inventors: Alex A. BEHFAR, Malcolm R. GREEN, Cristian STAGARESCU
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Publication number: 20180090907Abstract: A laser chip having a substrate, an epitaxial structure on the substrate, the epitaxial structure including an active region and the active region generating light, a waveguide formed in the epitaxial structure extending in a first direction, the waveguide having a front etched facet and a back etched facet that define an edge-emitting laser, and a first recessed region formed in the epitaxial structure, the first recessed region being arranged at a distance from the waveguide and having an opening adjacent to the back etched facet, the first recessed region facilitating testing of an adjacent laser chip prior to singulation of the laser chip.Type: ApplicationFiled: December 1, 2017Publication date: March 29, 2018Applicant: MACOM Technology Solutions Holdings, Inc.Inventors: Alex A. BEHFAR, Malcolm R. GREEN, Cristian STAGARESCU
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Patent number: 9893488Abstract: A laser chip having a substrate, an epitaxial structure on the substrate, the epitaxial structure including an active region and the active region generating light, a waveguide formed in the epitaxial structure extending in a first direction, the waveguide having a front etched facet and a back etched facet that define an edge-emitting laser, and a first recessed region formed in the epitaxial structure, the first recessed region being arranged at a distance from the waveguide and having an opening adjacent to the back etched facet, the first recessed region facilitating testing of an adjacent laser chip prior to singulation of the laser chip.Type: GrantFiled: January 13, 2015Date of Patent: February 13, 2018Assignee: MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.Inventors: Alex A. Behfar, Malcolm R. Green, Cristian Stagarescu
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Patent number: 9865993Abstract: A beam control structure for semiconductor lasers that allows modification of the shape of a beam allowing, for example, higher coupling into an optical fiber. The structure may comprise one or more of a tilted patio, a staircase, a reflective roof, and a reflective sidewall.Type: GrantFiled: May 20, 2016Date of Patent: January 9, 2018Assignee: MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.Inventors: Cristian Stagarescu, Alex A. Behfar, Norman Sze-keung Kwong
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Patent number: 9859687Abstract: A beam control structure for semiconductor lasers that allows modification of the shape of a beam allowing, for example, higher coupling into an optical fiber. The structure may comprise one or more of a tilted patio, a staircase, a reflective roof, and a reflective sidewall.Type: GrantFiled: May 20, 2016Date of Patent: January 2, 2018Assignee: MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.Inventors: Cristian Stagarescu, Alex A. Behfar, Norman Sze-keung Kwong
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Publication number: 20170244216Abstract: Techniques for efficient alignment of a semiconductor laser in a Photonic Integrated Circuit (PIC) are disclosed. In some embodiments, a photonic integrated circuit (PIC) may include a semiconductor laser that includes a laser mating surface, and a substrate that includes a substrate mating surface. A shape of the laser mating surface and a shape of the substrate mating surface may be configured to align the semiconductor laser with the substrate in three dimensions.Type: ApplicationFiled: February 17, 2017Publication date: August 24, 2017Applicant: MACOM Technology Solutions Holdings, Inc.Inventors: Roe HEMENWAY, Cristian STAGARESCU, Daniel MEEROVICH, Malcolm R. GREEN, Wolfgang PARZ, Jichi MA, Richard Robert GRZYBOWSKI, Nathan BICKEL
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Patent number: 9692202Abstract: A reflective surface is disclosed in conjunction with a semiconductor laser to shape a laser beam and modify a direction of the laser beam. The reflective surface may be formed on a structure disposed adjacent to a laser structure to allow high coupling of laser light to, for example, a silicon photonics chip or an optical fiber.Type: GrantFiled: November 7, 2014Date of Patent: June 27, 2017Assignee: MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.Inventors: Alex A. Behfar, Cristian Stagarescu, Norman Sze-keung Kwong
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Publication number: 20160285239Abstract: A beam control structure for semiconductor lasers that allows modification of the shape of a beam allowing, for example, higher coupling into an optical fiber. The structure may comprise one or more of a tilted patio, a staircase, a reflective roof, and a reflective sidewall.Type: ApplicationFiled: May 20, 2016Publication date: September 29, 2016Applicant: M/A-COM Technology Solutions Holdings, Inc.Inventors: Cristian STAGARESCU, Alex A. BEHFAR, Norman Sze-keung KWONG
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Publication number: 20160268769Abstract: A beam control structure for semiconductor lasers that allows modification of the shape of a beam allowing, for example, higher coupling into an optical fiber. The structure may comprise one or more of a tilted patio, a staircase, a reflective roof, and a reflective sidewall.Type: ApplicationFiled: May 20, 2016Publication date: September 15, 2016Applicant: M/A-COM Technology Solutions Holdings, Inc.Inventors: Cristian STAGARESCU, Alex A. BEHFAR, Norman Sze-keung KWONG
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Patent number: 9401582Abstract: A beam control structure for semiconductor lasers that allows modification of the shape of a beam allowing, for example, higher coupling into an optical fiber. The structure may comprise one or more of a tilted patio, a staircase, a reflective roof, and a reflective sidewall.Type: GrantFiled: May 7, 2013Date of Patent: July 26, 2016Assignee: M/A-COM TECHNOLOGY SOLUTIONS HOLDINGS, INC.Inventors: Cristian Stagarescu, Alex A. Behfar, Norman Sze-keung Kwong