Patents by Inventor Wupen Yuen
Wupen Yuen 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: 6760357Abstract: A vertical cavity apparatus includes first and second mirrors, a substrate and at least first and second active regions positioned between the first and second mirrors. At least one of the first and second mirrors is a fiber with a grating. At least a first tunnel junction is positioned between the first and second mirrors.Type: GrantFiled: June 23, 2000Date of Patent: July 6, 2004Assignee: Bandwidth9Inventors: Julien Boucart, Constance Chang-Hasnain, Michael Jansen, Rashit Nabiev, Wupen Yuen
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Publication number: 20030058902Abstract: A tunable laser has an electrically responsive substrate. A support block is positioned on the electrically responsive substrate. A structure includes a base section resting on the support block. A deformable section extends above the electrically responsive substrate and creates an air gap between the deformable section and the electrically responsive substrate. An active head is positioned at a predetermined location on the deformable section and is at least a portion of the top reflector member. An electrical tuning contact is disposed on the structure to apply a tuning voltage, V in order to produce a vertical electrostatic force Fd between the electrical tuning contact and the electrically responsive substrate. This alters the size and the shape of the air gap and tuning the tunable laser. At least one heat spreader layer is disposed within the electrically responsive substrate.Type: ApplicationFiled: September 27, 2002Publication date: March 27, 2003Inventor: Wupen Yuen
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Patent number: 6535541Abstract: A vertical cavity apparatus includes first and second mirrors, a substrate, first and second active regions and a plurality of individual active regions. Each of an individual active region is positioned between the first and second active regions. A first oxide layer is positioned between the first mirror and the second mirror. A plurality of tunnel junctions are positioned between the first and second mirrors.Type: GrantFiled: June 23, 2000Date of Patent: March 18, 2003Assignee: Bandwidth 9, IncInventors: Julien Boucart, Constance Chang-Hasnain, Michael Jansen, Rashit Nabiev, Wupen Yuen
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Patent number: 6493373Abstract: A vertical cavity apparatus includes first and second mirrors, a substrate and at least first and second active regions positioned between the first and second mirrors. At least one of the first and second mirrors is a fused mirror. At least a first tunnel junction is positioned between the first and second mirrors.Type: GrantFiled: June 23, 2000Date of Patent: December 10, 2002Assignee: Bandwidth 9, Inc.Inventors: Julien Boucart, Constance Chang-Hasnain, Michael Jansen, Rashit Nabiev, Wupen Yuen
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Patent number: 6493371Abstract: A vertical cavity apparatus includes a first mirror, a substrate and a second mirror coupled to the substrate. At least a first and a second active region are each positioned between the first and second mirrors. At least a first oxide layer is positioned between the first and second mirrors. At least a first tunnel junction is positioned between the first and second mirrors.Type: GrantFiled: June 23, 2000Date of Patent: December 10, 2002Assignee: Bandwidth9, Inc.Inventors: Julien Boucart, Constance Chang-Hasnain, Michael Jansen, Rashit Nabiev, Wupen Yuen
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Patent number: 6493372Abstract: A vertical cavity apparatus includes first and second mirrors, a substrate and at least first and second active regions positioned between the first and second mirrors. A first etched layer is positioned between the first and second mirrors. A first tunnel junction is positioned between the first and second mirrors.Type: GrantFiled: June 23, 2000Date of Patent: December 10, 2002Assignee: Bandwidth 9, Inc.Inventors: Julien Boucart, Constance Chang-Hasnain, Michael Jansen, Rashit Nabiev, Wupen Yuen
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Patent number: 6490311Abstract: A vertical cavity apparatus includes first and second mirrors, a substrate and at least first and second active regions positioned between the first and second mirrors. At least one of the first and second mirrors is a lattice relaxed mirror. At least a first tunnel junction is positioned between the first and second mirrors.Type: GrantFiled: June 23, 2000Date of Patent: December 3, 2002Assignee: Bandwidth 9, Inc.Inventors: Julien Boucart, Constance Chang-Hasnain, Michael Jansen, Rashit Nabiev, Wupen Yuen
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Patent number: 6487231Abstract: A vertical cavity apparatus includes first and second mirrors, a substrate and at least first and second active regions positioned between the first and second mirrors. At least one of the first and second mirrors is a dielectric mirror. At least a first tunnel junction is positioned between the first and second mirrors.Type: GrantFiled: June 23, 2000Date of Patent: November 26, 2002Assignee: Bandwidth 9, Inc.Inventors: Julien Boucart, Constance Chang-Hasnain, Michael Jansen, Rashit Nabiev, Wupen Yuen
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Patent number: 6487230Abstract: A vertical cavity apparatus includes a first mirror, a substrate and a second mirror coupled to the substrate. At least a first and a second active region are each positioned between the first and second mirrors. At least a first ion implantation layer is positioned between the first and second mirrors. At least a first tunnel junction is positioned between the first and second mirrors.Type: GrantFiled: June 23, 2000Date of Patent: November 26, 2002Assignee: Bandwidth 9, INCInventors: Julien Boucart, Constance Chang-Hasnain, Michael Jansen, Rashit Nabiev, Wupen Yuen
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Patent number: 6366597Abstract: A monolithic long-wavelength vertical optical cavity device built up along a vertical direction. The device, when designed as a surface emitting laser, has a bottom Distributed Bragg Reflector (DBR), an active region consisting of active bulk medium or quantum wells, a current confinement layer next to the active layer, and a top DBR. The bottom DBR and the active region are lattice matched to the lattice defining material, while the top DBR is lattice relaxed. The design achieves high reflectivity, low absorption and diffraction loss. The design also ensures low production cost due to low precision requirement and wafer size production. The device can be used as a light detector when the active region is replaced by a spacer or a optical filter.Type: GrantFiled: August 16, 1999Date of Patent: April 2, 2002Assignee: Bandwidth9 Inc.Inventors: Wupen Yuen, Gabriel S. Li, Contance J. Chang-Hasnain
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Patent number: 6351476Abstract: A tunable semiconductor laser system includes a laser with a semiconductor active region positioned between upper and lower confining regions of opposite type semiconductor material. First and second reflective members are positioned at opposing edges of the active and confining regions. A wavelength tuning member and a temperature sensor are coupled to the laser. A control loop is coupled to the temperature sensor and the tuning member. In response to a detected change in temperature the control loop sends an adjustment signal to the tuning member and the tuning member adjusts a voltage or current supplied to the laser to provide a controlled output beam of selected wavelength.Type: GrantFiled: January 16, 2001Date of Patent: February 26, 2002Assignee: Bandwidth9, Inc.Inventors: Peter Kner, Gabriel Li, D. Philip Worland, Rang-Chen Yu, Wupen Yuen
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Patent number: 6327287Abstract: A tunable semiconductor laser assembly includes a laser with a seal surface, a semiconductor active region positioned between upper and lower confining regions of opposite type semiconductor material and first and second reflective members positioned at opposing edges of the active and confining regions. A seal cap includes a seal ring. The seal cap seal ring is coupled to the seal surface and forms a hermetic seal. A wavelength tuning member and a temperature sensor is coupled to the laser. A temperature sensor coupled to the laser. A control loop is coupled to the temperature sensor and the tuning member. In response to a detected change in temperature the control loop sends an adjustment signal to the tuning member, and the tuning member adjusts a voltage or current supplied to the laser to provide a controlled frequency and power of an output beam.Type: GrantFiled: October 6, 2000Date of Patent: December 4, 2001Assignee: Bandwidth 9 IncInventors: Peter Kner, Gabriel Ll, Philip Worland, Rang-Chen Yu, Wupen Yuen
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Patent number: 6321003Abstract: A multiplexer for a wavelength division multiplexed optical communication system includes an optical circulator with at least first, second, third and fourth circulator ports. An optical fiber with a first optical transmission path is coupled to the first circulator port and carries a wavelength division multiplexed optical signal that includes signals 1−n. A second optical transmission path is in optical communication with the second circulator port. A first laser is coupled to the second optical transmission path. The first laser reflects the 1−n signals and adds a signal n+1. A control loop is coupled to the first laser. In response to a detected change in temperature the control loop sends a signal to adjust a voltage or current supplied to the first laser and provide a controlled frequency and power of an output beam.Type: GrantFiled: October 10, 2000Date of Patent: November 20, 2001Assignee: Bandwidth9, Inc.Inventors: Peter Kner, Gabriel Li, Philip Worland, Rang-Chen Yu, Wupen Yuen
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Publication number: 20010017876Abstract: A tunable semiconductor laser system includes a laser with a semiconductor active region positioned between upper and lower confining regions of opposite type semiconductor material. First and second reflective members are positioned at opposing edges of the active and confining regions. A wavelength tuning member and a temperature sensor are coupled to the laser. A control loop is coupled to the temperature sensor and the tuning member. In response to a detected change in temperature the control loop sends an adjustment signal to the tuning member and the tuning member adjusts a voltage or current supplied to the laser to provide a controlled output beam of selected wavelength.Type: ApplicationFiled: January 16, 2001Publication date: August 30, 2001Inventors: Peter Kner, Gabriel Li, D. Phillip Worland, Rang-Chen Yu, Wupen Yuen
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Patent number: 6233263Abstract: A monitoring and control assembly for an optical system includes a tunable laser. The laser generates a divergent output beam along an optical axis. A first photodetector is provided. A wavelength selective filter is tilted at an angle relative to the optical axis that provides an angular dependence of a wavelength reflection of the wavelength selective filter and directs the reflected output beam towards the first photodetector.Type: GrantFiled: June 4, 1999Date of Patent: May 15, 2001Assignee: Bandwidth9Inventors: Constance J. Chang-Hasnain, Renato Dato, Peter Kner, Gabriel S. Li, Philip Worland, Rang-Chen Yu, Wupen Yuen
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Patent number: 6222871Abstract: A monolithic vertical optical cavity device built up along a vertical direction. The device has a bottom Distributed Bragg Reflector (DBR), a Quantum Well (QW) region consisting of least one active layer grown on top of the bottom DBR by using a Selective Area Epitaxy (SAE) mask such that the active layer or layers exhibit a variation in at least one physical parameter in a horizontal plane perpendicular to the vertical direction and a top DBR deposited on top of the QW region. A spacer is deposited with or without SAE adjacent the QW region. The device has a variable Fabry-Perot distance defined along the vertical direction between the bottom DBR and the top DBR and a variable physical parameter of the active layer. The varying physical parameter of the active layers is either their surface curvature and/or the band gap and both of these parameters are regulated by SAE. The monolithic vertical cavity device can be used as a Vertical Cavity Surface Emitting Laser (VCSEL) or a Vertical Cavity Detector (VCDET).Type: GrantFiled: June 22, 1999Date of Patent: April 24, 2001Assignee: Bandwidth9Inventors: Constance Chang-Hasnain, Gabriel Li, Wupen Yuen
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Patent number: 6181717Abstract: A tunable semiconductor laser system includes a laser with a semiconductor active region positioned between upper and lower confining regions of opposite type semiconductor material. First and second reflective members are positioned at opposing edges of the active and confining regions. A wavelength tuning member and a temperature sensor are coupled to the laser. A control loop is coupled to the temperature sensor and the tuning member. In response to a detected change in temperature the control loop sends an adjustment signal to the tuning member and the tuning member adjusts a voltage or current supplied to the laser to provide a controlled output beam of selected wavelength.Type: GrantFiled: June 4, 1999Date of Patent: January 30, 2001Assignee: Bandwidth 9Inventors: Peter Kner, Gabriel Li, Philip Worland, Rang-Chen Yu, Wupen Yuen
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Patent number: 6174749Abstract: The present invention provides multiple-wavelength vertical-cavity surface-emitting laser (“MW-VCSEL”) arrays. These arrays are fabricated in a molecular beam epitaxy system or the like using two patterned-substrate growth techniques. The growth techniques can be used with an in-situ laser reflectometry. In one embodiment, a temperature dependent growth rate to create the devices is provided. In an alternative aspect, uniform growth is performed followed by a temperature-dependent desorption technique. These techniques provided desired wavelength span and desired characteristics.Type: GrantFiled: May 13, 1998Date of Patent: January 16, 2001Assignee: The Regents of the University of CaliforniaInventors: Wupen Yuen, Constance J. Chang-Hasnain, Gabriel S. Li
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Patent number: 5991326Abstract: A monolithic long-wavelength vertical optical cavity device built up along a vertical direction. The device, when designed as a surface emitting laser, has a bottom Distributed Bragg Reflector (DBR), an active region consisting of active bulk medium or quantum wells, a current confinement layer next to the active layer, and a top DBR. The bottom DBR and the active region are lattice matched to the lattice defining material, while the top DBR is lattice relaxed. The design achieves high reflectivity, low absorption and diffraction loss. The design also ensures low production cost due to low precision requirement and wafer size production. The device can be used as a light detector when the active region is replaced by a spacer or a optical filter.Type: GrantFiled: April 14, 1998Date of Patent: November 23, 1999Assignee: Bandwidth9, Inc.Inventors: Wupen Yuen, Gabriel S. Li, Constance J. Chang-Hasnian
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Patent number: 5960024Abstract: A monolithic vertical optical cavity device built up along a vertical direction. The device has a bottom Distributed Bragg Reflector (DBR), a Quantum Well (QW) region consisting of least one active layer grown on top of the bottom DBR by using a Selective Area Epitaxy (SAE) mask such that the active layer or layers exhibit a variation in at least one physical parameter in a horizontal plane perpendicular to the vertical direction and a top DBR deposited on top of the QW region. A spacer is deposited with or without SAE adjacent the QW region. The device has a variable Fabry-Perot distance defined along the vertical direction between the bottom DBR and the top DBR and a variable physical parameter of the active layer. The varying physical parameter of the active layers is either their surface curvature and/or the band gap and both of these parameters are regulated by SAE. The monolithic vertical cavity device can be used as a Vertical Cavity Surface Emitting Laser (VCSEL) or a Vertical Cavity Detector (VCDET).Type: GrantFiled: March 30, 1998Date of Patent: September 28, 1999Assignee: Bandwidth Unlimited, Inc.Inventors: Gabriel S. Li, Wupen Yuen, Constance J. Chang-Hasnain