Patents by Inventor Glenn Wayne Baxter
Glenn Wayne Baxter 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: 11656515Abstract: A liquid crystal on silicon (LCOS) device includes a silicon substrate and a pair of electrodes including an upper and a lower electrode. The lower electrode is mounted to the silicon substrate and includes a two dimensional array of pixels extending in both a first and second dimension. LCOS device also includes a liquid crystal layer disposed between the upper and lower electrodes and configured to be driveable into a plurality of electrical states by drive signals provided to the pixels of the lower electrode. The pixels are rectangular in profile having longer sides in the first dimension than in the second dimension. Further, the two dimensional array includes a pixel pitch that is greater in the first dimension than in the second dimension.Type: GrantFiled: June 25, 2021Date of Patent: May 23, 2023Assignee: II-VI DELAWARE, INCInventors: Julian Armstrong, Luke Stewart, Glenn Wayne Baxter, Jonathan Plumridge
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Publication number: 20220413346Abstract: A liquid crystal on silicon (LCOS) device includes a silicon substrate and a pair of electrodes including an upper and a lower electrode. The lower electrode is mounted to the silicon substrate and includes a two dimensional array of pixels extending in both a first and second dimension. LCOS device also includes a liquid crystal layer disposed between the upper and lower electrodes and configured to be driveable into a plurality of electrical states by drive signals provided to the pixels of the lower electrode. The pixels are rectangular in profile having longer sides in the first dimension than in the second dimension. Further, the two dimensional array includes a pixel pitch that is greater in the first dimension than in the second dimension.Type: ApplicationFiled: June 25, 2021Publication date: December 29, 2022Inventors: Julian Armstrong, Luke Stewart, Glenn Wayne Baxter, Jonathan Plumridge
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Publication number: 20220171282Abstract: Described herein are embodiments of a diffractive optical element (23) such as a grism. In one embodiment, the diffractive optical element (23) includes an input surface (31) configured to receive an input optical signal (29), a diffractive surface (33) adapted to spatially disperse the input optical beam (29) into a dispersed signal and an output surface (35) configured to output the dispersed signal from the diffractive optical element. The input surface (31) and the diffractive surface (33) are non-parallel and the diffractive surface (33) is formed in situ by a photolithographic technique.Type: ApplicationFiled: February 18, 2022Publication date: June 2, 2022Inventors: Nitesh Gulati, Vincent Choo, Yiwei Xu, Glenn Wayne Baxter, Steven James Frisken
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Patent number: 11300874Abstract: Described herein are embodiments of a diffractive optical element (23) such as a grism. In one embodiment, the diffractive optical element (23) includes an input surface (31) configured to receive an input optical signal (29), a diffractive surface (33) adapted to spatially disperse the input optical beam (29) into a dispersed signal and an output surface (35) configured to output the dispersed signal from the diffractive optical element. The input surface (31) and the diffractive surface (33) are non-parallel and the diffractive surface (33) is formed in situ by a photolithographic technique.Type: GrantFiled: April 11, 2019Date of Patent: April 12, 2022Assignee: II-VI Delaware, Inc.Inventors: Nitesh Gulati, Vincent Choo, Yiwei Xu, Glenn Wayne Baxter, Steven James Frisken
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Patent number: 10859739Abstract: Described herein is a diffraction grating (1) for use in an optical system. The diffraction grating includes a substrate (2) and an array of elongate diffracting elements (3) arranged in a grating profile across the substrate. The grating profile imparts a predefined phase change to optical beams to at least partially correct the beams for optical aberrations present in the optical system.Type: GrantFiled: June 2, 2019Date of Patent: December 8, 2020Assignee: II-VI Delaware, Inc.Inventors: Luke Stewart, Glenn Wayne Baxter, Steven James Frisken
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Publication number: 20190317256Abstract: Described herein are embodiments of a diffractive optical element (23) such as a grism. In one embodiment, the diffractive optical element (23) includes an input surface (31) configured to receive an input optical signal (29), a diffractive surface (33) adapted to spatially disperse the input optical beam (29) into a dispersed signal and an output surface (35) configured to output the dispersed signal from the diffractive optical element. The input surface (31) and the diffractive surface (33) are non-parallel and the diffractive surface (33) is formed in situ by a photolithographic technique.Type: ApplicationFiled: April 11, 2019Publication date: October 17, 2019Applicant: Finisar CorporationInventors: Nitesh Gulati, Vincent Choo, Yiwei Xu, Glenn Wayne Baxter, Steven James Frisken
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Publication number: 20190302330Abstract: Described herein is a diffraction grating (1) for use in an optical system. The diffraction grating includes a substrate (2) and an array of elongate diffracting elements (3) arranged in a grating profile across the substrate. The grating profile imparts a predefined phase change to optical beams to at least partially correct the beams for optical aberrations present in the optical system.Type: ApplicationFiled: June 2, 2019Publication date: October 3, 2019Applicant: Finisar CorporationInventors: Luke Stewart, Glenn Wayne Baxter, Steven James Frisken
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Patent number: 10310148Abstract: Described herein is a diffraction grating (1) for use in an optical system. The diffraction grating includes a substrate (2) and an array of elongate diffracting elements (3) arranged in a grating profile across the substrate. The grating profile imparts a predefined phase change to optical beams to at least partially correct the beams for optical aberrations present in the optical system.Type: GrantFiled: May 17, 2014Date of Patent: June 4, 2019Assignee: Finisar CorporationInventors: Luke Stewart, Glenn Wayne Baxter, Steven James Frisken
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Patent number: 9065707Abstract: Described herein is an optical phase modulator (20) including a liquid crystal element (22), disposed between a pair of opposing electrodes (24) and (26). The electrodes (24, 26) are electrically driven for supplying an electric potential V across the liquid crystal element (22) to drive the liquid crystals within element (22) in a predetermined configuration. Electrode (26) includes a grid of individually drivable pixel regions (28), at least some of which include a sub-wavelength grating structure that provides an anisotropic refractive index profile in orthogonal lateral dimensions, thereby creating an effective material form birefringence. Light incident through liquid crystal element (22) and onto electrode (26) is reflected and experiences a relative phase difference of 180° between its constituent orthogonal polarization components, thereby rotating each polarization component into the orthogonal orientation upon reflection.Type: GrantFiled: September 11, 2012Date of Patent: June 23, 2015Assignee: Finisar CorporationInventors: Steven James Frisken, Glenn Wayne Baxter, Qihong Wu
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Patent number: 9046657Abstract: Through its higher refractive index, a silicon grism can be used to reduce the Described herein are systems and methods for reducing optical aberrations in an optical system to decrease polarization dependent loss. Embodiments are provided particularly to define beam trajectories through an optical switching system which reduce off-axis aberrations. In one embodiment, a silicon grism is provided for reducing the curvature of the focal plane at an LCOS device in a wavelength selective switch (WSS) such that the separated polarization states converge at the LCOS at substantially the same point along the optical axis for all wavelengths. In this embodiment, an axial offset at the LCOS device will not produce large PDL at the coupling fibers. In another embodiment, a coupling lens having an arcuate focusing region is provided to address an offset in the optical beams, such that the separated polarization states couple symmetrically to respective output fibers.Type: GrantFiled: December 16, 2012Date of Patent: June 2, 2015Assignee: Finisar CorporationInventors: Luke Stewart, Glenn Wayne Baxter
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Publication number: 20140347733Abstract: Described herein is a diffraction grating (1) for use in an optical system. The diffraction grating includes a substrate (2) and an array of elongate diffracting elements (3) arranged in a grating profile across the substrate. The grating profile imparts a predefined phase change to optical beams to at least partially correct the beams for optical aberrations present in the optical system.Type: ApplicationFiled: May 17, 2014Publication date: November 27, 2014Applicant: FINISAR CORPORATIONInventors: Luke Stewart, Glenn Wayne Baxter, Steven James Frisken
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Patent number: 8867917Abstract: Described herein are systems and methods of enhancing channel bandwidth in an optical system having a number of wavelength selective switching (WSS) devices. The method includes the steps of passing the optical signals through the WSS devices by: (i) spatially dispersing the wavelength channels of the optical signals; (ii) projecting the spatially dispersed channels onto corresponding predetermined regions of an optical manipulation matrix including a plurality of individually addressable manipulating elements; (iii) determining a modification function that specifies a state for each manipulating element within the predetermined region; and (iv) driving the elements of the corresponding regions at states specified by the function to selectively modify the channel band shape such that the received channel's bandwidth is substantially enhanced, and to spatially direct the wavelength channels to predetermined output ports of the WSS devices.Type: GrantFiled: June 25, 2012Date of Patent: October 21, 2014Assignee: Finisar CorporationInventors: Steven James Frisken, Glenn Wayne Baxter, Cibby Pulikkaseril, Novelene Wang
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Publication number: 20130070326Abstract: Described herein is an optical phase modulator (20) including a liquid crystal element (22), disposed between a pair of opposing electrodes (24) and (26). The electrodes (24, 26) are electrically driven for supplying an electric potential V across the liquid crystal element (22) to drive the liquid crystals within element (22) in a predetermined configuration. Electrode (26) includes a grid of individually drivable pixel regions (28), at least some of which include a sub-wavelength grating structure that provides an anisotropic refractive index profile in orthogonal lateral dimensions, thereby creating an effective material form birefringence. Light incident through liquid crystal element (22) and onto electrode (26) is reflected and experiences a relative phase difference of 180° between its constituent orthogonal polarization components, thereby rotating each polarization component into the orthogonal orientation upon reflection.Type: ApplicationFiled: September 11, 2012Publication date: March 21, 2013Applicant: FINISAR CORPORATIONInventors: Steven James Frisken, Glenn Wayne Baxter, Qihong Wu
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Publication number: 20120328291Abstract: Described herein are systems and methods of enhancing channel bandwidth in an optical system having a number of wavelength selective switching (WSS) devices. The method includes the steps of passing the optical signals through the WSS devices by: (i) spatially dispersing the wavelength channels of the optical signals; (ii) projecting the spatially dispersed channels onto corresponding predetermined regions of an optical manipulation matrix including a plurality of individually addressable manipulating elements; (iii) determining a modification function that specifies a state for each manipulating element within the predetermined region; and (iv) driving the elements of the corresponding regions at states specified by the function to selectively modify the channel band shape such that the received channel's bandwidth is substantially enhanced, and to spatially direct the wavelength channels to predetermined output ports of the WSS devices.Type: ApplicationFiled: June 25, 2012Publication date: December 27, 2012Applicant: FINISAR CORPORATIONInventors: Steven James Frisken, Glenn Wayne Baxter, Cibby Pulikkaseril, Novelene Wang
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Patent number: 7787720Abstract: An optical coupling device including: at least a first input port for delivering an optical input signal beam that includes a plurality of wavelength channels; at least a first optical output port for receiving an optical output signal beam; a wavelength dispersion element for spatially separating the plurality of wavelength channels in the optical input signal beam to form a plurality of spatially separated wavelength channel beams; an optical coupling device for independently modifying the phase of each of the spatially separated wavelength channel beams such that, for at least one wavelength channel beam, a selected fraction of the light is coupled to the first output port and a fraction of the light is coupled away from the first output port.Type: GrantFiled: September 27, 2004Date of Patent: August 31, 2010Assignee: Optium Australia PTY LimitedInventors: Steven James Frisken, Glenn Wayne Baxter, Hao Zhou, Dmitri Abakoumov
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Publication number: 20030210727Abstract: A method of filtering an input optical signal, the method including the step of: (a) utilising the phase response of a Gires-Tournois resonator to produce a corresponding spatial separation in a predetermined wavelength range of the input optical signal. The method further preferably can include the step of: (b) projecting substantially orthogonal beams onto the surface of a Gires-Tournois resonator at slightly different angles of incidence and utilising the phase difference in the phase response of the orthogonal beams to spatially separate the predetermined wavelength range. A birefringent wedge can be utilised to separate a polarised input beam into the substantially orthogonal beams for projection onto the surface of the Gires-Tournois resonator.Type: ApplicationFiled: May 7, 2002Publication date: November 13, 2003Applicant: Engana Pty Ltd.Inventors: Steven James Frisken, Dmitri Abakoumov, Glenn Wayne Baxter