Patents by Inventor Harry H. Bagheri
Harry H. Bagheri 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: 9496684Abstract: A system to control an optical signal may include a semiconductor laser diode. The system may also include an optical amplifier to receive an optical signal from the semiconductor laser diode. The optical amplifier may be configured to spectrally filter the optical signal.Type: GrantFiled: December 22, 2009Date of Patent: November 15, 2016Assignee: International Business Machines CorporationInventors: Harry H. Bagheri, Casimer M. DeCusatis
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Patent number: 8988769Abstract: The embodiments herein provide a device and a method for extending the bandwidth of short wavelength and long wavelength fiber optic lengths. The embodiments herein provide for an optical transmitter package device comprising: a laser diode; and a semiconductor optical amplifier connected directly after and in close proximity to the laser diode, wherein the semiconductor optical amplifier is adapted to operate in a frequency domain such that the semiconductor optical amplifier filters and reshapes optical wavelengths from the laser diode, and wherein the semiconductor optical amplifier is biased below an amplification threshold for the semiconductor optical amplifier. The device may also comprises a feedback circuit which comprises an optical splitter, wherein the feedback circuit samples reshaped optical output from the semiconductor optical amplifier and dynamically adjusts one or both of the semiconductor optical amplifier and the laser diode.Type: GrantFiled: July 20, 2011Date of Patent: March 24, 2015Assignee: International Business Machines CorporationInventors: Robert G. Atkins, Harry H. Bagheri, Casimer M. DeCusatis
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Publication number: 20110274440Abstract: The embodiments herein provide a device and a method for extending the bandwidth of short wavelength and long wavelength fiber optic lengths. The embodiments herein provide for an optical transmitter package device comprising: a laser diode; and a semiconductor optical amplifier connected directly after and in close proximity to the laser diode, wherein the semiconductor optical amplifier is adapted to operate in a frequency domain such that the semiconductor optical amplifier filters and reshapes optical wavelengths from the laser diode, and wherein the semiconductor optical amplifier is biased below an amplification threshold for the semiconductor optical amplifier. The device may also comprises a feedback circuit which comprises an optical splitter, wherein the feedback circuit samples reshaped optical output from the semiconductor optical amplifier and dynamically adjusts one or both of the semiconductor optical amplifier and the laser diode.Type: ApplicationFiled: July 20, 2011Publication date: November 10, 2011Applicant: International Business Machines CorporationInventors: Robert G. Atkins, Harry H. Bagheri, Casimer M. DeCusatis
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Patent number: 8031398Abstract: The invention provides a device and a method for extending the bandwidth of short wavelength and long wavelength fiber optic lengths. The invention provides for an optical transmitter package device comprising: a laser diode; and a semiconductor optical amplifier connected directly after and in close proximity to the laser diode, wherein the semiconductor optical amplifier is adapted to operate in a frequency domain such that the semiconductor optical amplifier filters and reshapes optical wavelengths from the laser diode, and wherein the semiconductor optical amplifier is biased below an amplification threshold for the semiconductor optical amplifier. The device may also comprises a feedback circuit which comprises an optical splitter, wherein the feedback circuit samples reshaped optical output from the semiconductor optical amplifier and dynamically adjusts one or both of the semiconductor optical amplifier and the laser diode.Type: GrantFiled: July 31, 2008Date of Patent: October 4, 2011Assignee: International Business Machines CorporationInventors: Robert G. Atkins, Harry H. Bagheri, Casimer M. DeCusatis
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Publication number: 20110149385Abstract: A system to control an optical signal may include a semiconductor laser diode. The system may also include an optical amplifier to receive an optical signal from the semiconductor laser diode. The optical amplifier may be configured to spectrally filter the optical signal.Type: ApplicationFiled: December 22, 2009Publication date: June 23, 2011Applicant: International Business Machines CorporationInventors: Harry H. Bagheri, Casimer M. DeCusatis
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Method for reducing bandwidth loss in data center applications with multiple fiber type connectivity
Patent number: 7773844Abstract: A communications coupling for a low bandwidth fiber optic cable and a high bandwidth fiber optic cable, includes: a guiding ferrule adapted for coupling to a surrogate fiber optic cable comprised of one of the low bandwidth fiber optic cable and the high bandwidth fiber optic cable, the guiding ferrule including at least one mounting feature for aligning the guiding ferrule with an optical axis of the surrogate cable; the guiding ferrule further including at least one guiding feature for aligning the optical axis of the surrogate fiber optic cable with an optical axis of a connecting fiber optic cable, the connecting fiber optic cable comprised of the other one of the low bandwidth fiber optic cable and the high bandwidth fiber optic cable. A method and a communications infrastructure are provided.Type: GrantFiled: May 16, 2008Date of Patent: August 10, 2010Assignee: International Business Machines CorporationInventors: Harry H. Bagheri, Lawrence Jacobowitz, Kenneth A. Scea -
Patent number: 7734132Abstract: The embodiments of the invention provide an apparatus for optical spectral filtering and dispersion control for wavelength multiplexed laser sources using fiber Bragg gratings. More specifically, the apparatus includes a laser diode having a first end and a second end opposite the first end. The first end of the laser diode has a first semi-transparent portion; and, the second end of the laser diode has a second semi-transparent portion. The apparatus further includes an optical fiber connected to the second end of the laser diode. The optical fiber has a first end and a second end opposite the first end, wherein the first end of the optical fiber is connected to the second end of the laser diode. The laser diode comprises a laser cavity; and, the optical fiber comprises an extension of the laser cavity. Moreover, the second end of the optical fiber has a reflective surface.Type: GrantFiled: July 20, 2007Date of Patent: June 8, 2010Assignee: International Business Machines CorporationInventors: Robert G. Atkins, Harry H. Bagheri, Casimer M. DeCusatis, Lawrence Jacobowitz
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Publication number: 20090285525Abstract: A communications coupling for a low bandwidth fiber optic cable and a high bandwidth fiber optic cable, includes: a guiding ferrule adapted for coupling to a surrogate fiber optic cable comprised of one of the low bandwidth fiber optic cable and the high bandwidth fiber optic cable, the guiding ferrule including at least one mounting feature for aligning the guiding ferrule with an optical axis of the surrogate cable; the guiding ferrule further including at least one guiding feature for aligning the optical axis of the surrogate fiber optic cable with an optical axis of a connecting fiber optic cable, the connecting fiber optic cable comprised of the other one of the low bandwidth fiber optic cable and the high bandwidth fiber optic cable. A method and a communications infrastructure are provided.Type: ApplicationFiled: May 16, 2008Publication date: November 19, 2009Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Harry H. Bagheri, Lawrence Jacobowitz, Kenneth A. Scea
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Patent number: 7489440Abstract: The invention provides a device and a method for extending the bandwidth of short wavelength and long wavelength fiber optic lengths. The invention provides for an optical transmitter package device comprising: a laser diode; and a semiconductor optical amplifier connected directly after and in close proximity to the laser diode, wherein the semiconductor optical amplifier is adapted to operate in a frequency domain such that the semiconductor optical amplifier filters and reshapes optical wavelengths from the laser diode, and wherein the semiconductor optical amplifier is biased below an amplification threshold for the semiconductor optical amplifier. The device may also comprises a feedback circuit which comprises an optical splitter, wherein the feedback circuit samples reshaped optical output from the semiconductor optical amplifier and dynamically adjusts one or both of the semiconductor optical amplifier and the laser diode.Type: GrantFiled: October 19, 2006Date of Patent: February 10, 2009Assignee: International Business Machines CorporationInventors: Robert G. Atkins, Harry H. Bagheri, Casimer M. DeCusatis
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Publication number: 20090022181Abstract: The embodiments of the invention provide an apparatus for optical spectral filtering and dispersion control for wavelength multiplexed laser sources using fiber Bragg gratings. More specifically, the apparatus includes a laser diode having a first end and a second end opposite the first end. The first end of the laser diode has a first semi-transparent portion; and, the second end of the laser diode has a second semi-transparent portion. The apparatus further includes an optical fiber connected to the second end of the laser diode. The optical fiber has a first end and a second end opposite the first end, wherein the first end of the optical fiber is connected to the second end of the laser diode. The laser diode comprises a laser cavity; and, the optical fiber comprises an extension of the laser cavity. Moreover, the second end of the optical fiber has a reflective surface.Type: ApplicationFiled: July 20, 2007Publication date: January 22, 2009Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Robert G. Atkins, Harry H. Bagheri, Casimer M. DeCusatis, Lawrence Jacobowitz
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Publication number: 20080298417Abstract: The invention provides a device and a method for extending the bandwidth of short wavelength and long wavelength fiber optic lengths. The invention provides for an optical transmitter package device comprising: a laser diode; and a semiconductor optical amplifier connected directly after and in close proximity to the laser diode, wherein the semiconductor optical amplifier is adapted to operate in a frequency domain such that the semiconductor optical amplifier filters and reshapes optical wavelengths from the laser diode, and wherein the semiconductor optical amplifier is biased below an amplification threshold for the semiconductor optical amplifier. The device may also comprises a feedback circuit which comprises an optical splitter, wherein the feedback circuit samples reshaped optical output from the semiconductor optical amplifier and dynamically adjusts one or both of the semiconductor optical amplifier and the laser diode.Type: ApplicationFiled: July 31, 2008Publication date: December 4, 2008Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Robert G. Atkins, Harry H. Bagheri, Casimer M. DeCusatis
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Publication number: 20080094693Abstract: The invention provides a device and a method for extending the bandwidth of short wavelength and long wavelength fiber optic lengths. The invention provides for an optical transmitter package device comprising: a laser diode; and a semiconductor optical amplifier connected directly after and in close proximity to the laser diode, wherein the semiconductor optical amplifier is adapted to operate in a frequency domain such that the semiconductor optical amplifier filters and reshapes optical wavelengths from the laser diode, and wherein the semiconductor optical amplifier is biased below an amplification threshold for the semiconductor optical amplifier. The device may also comprises a feedback circuit which comprises an optical splitter, wherein the feedback circuit samples reshaped optical output from the semiconductor optical amplifier and dynamically adjusts one or both of the semiconductor optical amplifier and the laser diode.Type: ApplicationFiled: October 19, 2006Publication date: April 24, 2008Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Robert G. Atkins, Harry H. Bagheri, Casimer M. DeCusatis