Patents by Inventor ANAND RAMASWAMY
ANAND RAMASWAMY 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: 11815725Abstract: An example photonic integrated circuit includes a transmitter circuit with a optical communication path to an optical coupler configured to couple with an optical fiber. The optical communication path has a propagation direction away from the transmitter circuit and towards the optical coupler. A counter-propagating tap diverts light sent by a light source backward against the propagation direction of the optical communication path. A photodiode receives the diverted light and measures its power level. The photodiode generates a feedback signal for the optical coupler and provides the feedback signal to the optical coupler. The optical coupler receives the feedback signal and adjusts a coupling alignment of the optical communication path to the optical fiber based on the feedback signal, which indicates the measured power level of the diverted counter-propagating light.Type: GrantFiled: December 17, 2021Date of Patent: November 14, 2023Assignee: OpenLight Photonics, Inc.Inventors: Brandon W. Buckley, Brian Robert Koch, John Garcia, Jared Bauters, Sudharsanan Srinivasan, Anand Ramaswamy
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Patent number: 11747363Abstract: Described are various configurations for performing efficient optical and electrical testing of an opto-electrical device using a compact opto-electrical probe. The compact opto-electrical probe can include electrical contacts arranged for a given electrical contact layout of the opto-electrical device, and optical interface with a window in a probe core that transmits light from the opto-electrical device. An adjustable optical coupler of the probe can be mechanically positioned to receive light from the device's emitter to perform simultaneous optical and electrical analysis of the device.Type: GrantFiled: December 16, 2021Date of Patent: September 5, 2023Assignee: OpenLight Photonics, Inc.Inventors: Molly Piels, Anand Ramaswamy, Brandon Gomez
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Patent number: 11546055Abstract: An optical transceiver can be calibrated using an internal receiver side eye scan generator, and calibration values (e.g., modulator values) can be stored in memory for recalibration of the optical transceiver. The eye scan generator can receive data from the transmitter portion via an integrated and reconfigurable loopback path. At a later time, different calibration values can be accessed in memory and used to recalibrate the optical transceiver or update the calibrated values using the receive-side eye scan generator operating in loopback mode.Type: GrantFiled: June 15, 2021Date of Patent: January 3, 2023Assignee: OpenLight Photonics, Inc.Inventors: Robert S. Guzzon, Sean P. Woyciehowsky, Roberto Marcoccia, Anand Ramaswamy, John Garcia, Sudharsanan Srinivasan
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Publication number: 20220393047Abstract: Embodiments of the invention describe apparatuses, optical systems, and methods related to utilizing optical cladding layers. According to one embodiment, a hybrid optical device includes a silicon semiconductor layer and a III-V semiconductor layer having an overlapping region, wherein a majority of a field of an optical mode in the overlapping region is to be contained in the III-V semiconductor layer. A cladding region between the silicon semiconductor layer and the III-V semiconductor layer has a spatial property to substantially confine the optical mode to the III-V semiconductor layer and enable heat dissipation through the silicon semiconductor layer.Type: ApplicationFiled: August 17, 2022Publication date: December 8, 2022Inventors: Erik Johan Norberg, Anand Ramaswamy, Brian Robert Koch
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Patent number: 11430901Abstract: Embodiments of the invention describe apparatuses, optical systems, and methods related to utilizing optical cladding layers. According to one embodiment, a hybrid optical device includes a silicon semiconductor layer and a III-V semiconductor layer having an overlapping region, wherein a majority of a field of an optical mode in the overlapping region is to be contained in the III-V semiconductor layer. A cladding region between the silicon semiconductor layer and the III-V semiconductor layer has a spatial property to substantially confine the optical mode to the III-V semiconductor layer and enable heat dissipation through the silicon semiconductor layer.Type: GrantFiled: October 7, 2020Date of Patent: August 30, 2022Assignee: OpenLight Photonics, Inc.Inventors: Erik Johan Norberg, Anand Ramaswamy, Brian Robert Koch
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Publication number: 20220107341Abstract: Described are various configurations for performing efficient optical and electrical testing of an opto-electrical device using a compact opto-electrical probe. The compact opto-electrical probe can include electrical contacts arranged for a given electrical contact layout of the opto-electrical device, and optical interface with a window in a probe core that transmits light from the opto-electrical device. An adjustable optical coupler of the probe can be mechanically positioned to receive light from the device's emitter to perform simultaneous optical and electrical analysis of the device.Type: ApplicationFiled: December 16, 2021Publication date: April 7, 2022Inventors: Molly Piels, Anand Ramaswamy, Brandon Gomez
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Patent number: 11243362Abstract: An example photonic integrated circuit includes a transmitter circuit with a optical communication path to an optical coupler configured to couple with an optical fiber. The optical communication path has a propagation direction away from the transmitter circuit and towards the optical coupler. A counter-propagating tap diverts light sent by a light source backward against the propagation direction of the optical communication path. A photodiode receives the diverted light and measures its power level. The photodiode generates a feedback signal for the optical coupler and provides the feedback signal to the optical coupler. The optical coupler receives the feedback signal and adjusts a coupling alignment of the optical communication path to the optical fiber based on the feedback signal, which indicates the measured power level of the diverted counter-propagating light.Type: GrantFiled: July 1, 2020Date of Patent: February 8, 2022Assignee: Juniper Networks, Inc.Inventors: Brandon W. Buckley, Brian Robert Koch, John Garcia, Jared Bauters, Sudharsanan Srinivasan, Anand Ramaswamy
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Patent number: 11243230Abstract: Described are various configurations for performing efficient optical and electrical testing of an opto-electrical device using a compact opto-electrical probe. The compact opto-electrical probe can include electrical contacts arranged for a given electrical contact layout of the opto-electrical device, and optical interface with a window in a probe core that transmits light from the opto-electrical device. An adjustable optical coupler of the probe can be mechanically positioned to receive light from the device's emitter to perform simultaneous optical and electrical analysis of the device.Type: GrantFiled: December 30, 2019Date of Patent: February 8, 2022Assignee: Juniper Networks, Inc.Inventors: Molly Piels, Anand Ramaswamy, Brandon Gomez
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Publication number: 20220029705Abstract: An optical device such as an optical transceiver can include a cascaded built-in self-test structure that can be configured in testing mode using an active power mode and can sufficiently attenuate light away from a loopback path in an inactive power mode. The optical device can include a wafer top emitter that can be used to tune a light source for testing and calibration of optical components while the built-in self-test structure is in active mode.Type: ApplicationFiled: September 15, 2021Publication date: January 27, 2022Inventors: John Parker, John Garcia, Brandon Gomez, Molly Piels, Anand Ramaswamy
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Publication number: 20210399799Abstract: An optical transceiver can be calibrated using an internal receiver side eye scan generator, and calibration values (e.g., modulator values) can be stored in memory for recalibration of the optical transceiver. The eye scan generator can receive data from the transmitter portion via an integrated and reconfigurable loopback path. At a later time, different calibration values can be accessed in memory and used to recalibrate the optical transceiver or update the calibrated values using the receive-side eye scan generator operating in loopback mode.Type: ApplicationFiled: June 15, 2021Publication date: December 23, 2021Inventors: Robert S. Guzzon, Sean P. Woyciehowsky, Roberto Marcoccia, Anand Ramaswamy, John Garcia, Sudharsanan Srinivasan
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Patent number: 11153009Abstract: An optical device such as an optical transceiver can include a cascaded built-in self-test structure that can be configured in testing mode using an active power mode and can sufficiently attenuate light away from a loopback path in an inactive power mode. The optical device can include a wafer top emitter that can be used to tune a light source for testing and calibration of optical components while the built-in self-test structure is in active mode.Type: GrantFiled: July 21, 2020Date of Patent: October 19, 2021Assignee: Juniper Networks, Inc.Inventors: John Parker, John Garcia, Brandon Gomez, Molly Piels, Anand Ramaswamy
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Patent number: 11070288Abstract: An optical transceiver can be calibrated using an internal receiver side eye scan generator, and calibration values (e.g., modulator values) can be stored in memory for recalibration of the optical transceiver. The eye scan generator can receive data from the transmitter portion via an integrated and reconfigurable loopback path. At a later time, different calibration values can be accessed in memory and used to recalibrate the optical transceiver or update the calibrated values using the receive-side eye scan generator operating in loopback mode.Type: GrantFiled: June 22, 2020Date of Patent: July 20, 2021Assignee: Juniper Networks, Inc.Inventors: Robert S. Guzzon, Sean P. Woyciehowsky, Roberto Marcoccia, Anand Ramaswamy, John Garcia, Sudharsanan Srinivasan
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Publication number: 20210199691Abstract: Described are various configurations for performing efficient optical and electrical testing of an opto-electrical device using a compact opto-electrical probe. The compact opto-electrical probe can include electrical contacts arranged for a given electrical contact layout of the opto-electrical device, and optical interface with a window in a probe core that transmits light from the opto-electrical device. An adjustable optical coupler of the probe can be mechanically positioned to receive light from the device's emitter to perform simultaneous optical and electrical analysis of the device.Type: ApplicationFiled: December 30, 2019Publication date: July 1, 2021Inventors: Molly Piels, Anand Ramaswamy, Brandon Gomez
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Publication number: 20210028323Abstract: Embodiments of the invention describe apparatuses, optical systems, and methods related to utilizing optical cladding layers. According to one embodiment, a hybrid optical device includes a silicon semiconductor layer and a III-V semiconductor layer having an overlapping region, wherein a majority of a field of an optical mode in the overlapping region is to be contained in the III-V semiconductor layer. A cladding region between the silicon semiconductor layer and the III-V semiconductor layer has a spatial property to substantially confine the optical mode to the III-V semiconductor layer and enable heat dissipation through the silicon semiconductor layer.Type: ApplicationFiled: October 7, 2020Publication date: January 28, 2021Inventors: Erik Johan Norberg, Anand Ramaswamy, Brian Robert Koch
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Patent number: 10833213Abstract: Embodiments of the invention describe apparatuses, optical systems, and methods related to utilizing optical cladding layers. According to one embodiment, a hybrid optical device includes a silicon semiconductor layer and a III-V semiconductor layer having an overlapping region, wherein a majority of a field of an optical mode in the overlapping region is to be contained in the III-V semiconductor layer. A cladding region between the silicon semiconductor layer and the III-V semiconductor layer has a spatial property to substantially confine the optical mode to the III-V semiconductor layer and enable heat dissipation through the silicon semiconductor layer.Type: GrantFiled: August 22, 2019Date of Patent: November 10, 2020Assignee: Juniper Networks, Inc.Inventors: Erik Johan Norberg, Anand Ramaswamy, Brian Robert Koch
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Publication number: 20200333540Abstract: An example photonic integrated circuit includes a transmitter circuit with a optical communication path to an optical coupler configured to couple with an optical fiber. The optical communication path has a propagation direction away from the transmitter circuit and towards the optical coupler. A counter-propagating tap diverts light sent by a light source backward against the propagation direction of the optical communication path. A photodiode receives the diverted light and measures its power level. The photodiode generates a feedback signal for the optical coupler and provides the feedback signal to the optical coupler. The optical coupler receives the feedback signal and adjusts a coupling alignment of the optical communication path to the optical fiber based on the feedback signal, which indicates the measured power level of the diverted counter-propagating light.Type: ApplicationFiled: July 1, 2020Publication date: October 22, 2020Inventors: Brandon W. Buckley, Brian Robert Koch, John Garcia, Jared Bauters, Sudharsanan Srinivasan, Anand Ramaswamy
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Patent number: 10739539Abstract: An example photonic integrated circuit includes a transmitter circuit with a optical communication path to an optical coupler configured to couple with an optical fiber. The optical communication path has a propagation direction away from the transmitter circuit and towards the optical coupler. A counter-propagating tap diverts light sent by a light source backward against the propagation direction of the optical communication path. A photodiode receives the diverted light and measures its power level. The photodiode generates a feedback signal for the optical coupler and provides the feedback signal to the optical coupler. The optical coupler receives the feedback signal and adjusts a coupling alignment of the optical communication path to the optical fiber based on the feedback signal, which indicates the measured power level of the diverted counter-propagating light.Type: GrantFiled: March 15, 2019Date of Patent: August 11, 2020Assignee: Juniper Networks, Inc.Inventors: Brandon W. Buckley, Brian Robert Koch, John Garcia, Jared Bauters, Sudharsanan Srinivasan, Anand Ramaswamy
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Publication number: 20190378941Abstract: Embodiments of the invention describe apparatuses, optical systems, and methods related to utilizing optical cladding layers. According to one embodiment, a hybrid optical device includes a silicon semiconductor layer and a semiconductor layer having an overlapping region, wherein a majority of a field of an optical mode in the overlapping region is to be contained in the III-V semiconductor layer. A cladding region between the silicon semiconductor layer and the III-V semiconductor layer has a spatial property to substantially confine the optical mode to the III-V semiconductor layer and enable heat dissipation through the silicon semiconductor layer.Type: ApplicationFiled: August 22, 2019Publication date: December 12, 2019Inventors: Erik Johan Norberg, Anand Ramaswamy, Brian Robert Koch
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Patent number: 10431703Abstract: Embodiments of the invention describe apparatuses, optical systems, and methods related to utilizing optical cladding layers. According to one embodiment, a hybrid optical device includes a silicon semiconductor layer and a III-V semiconductor layer having an overlapping region, wherein a majority of a field of an optical mode in the overlapping region is to be contained in the III-V semiconductor layer. A cladding region between the silicon semiconductor layer and the III-V semiconductor layer has a spatial property to substantially confine the optical mode to the III-V semiconductor layer and enable heat dissipation through the silicon semiconductor layer.Type: GrantFiled: March 21, 2018Date of Patent: October 1, 2019Assignee: Juniper Networks, Inc.Inventors: Erik Johan Norberg, Anand Ramaswamy, Brian Robert Koch
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Publication number: 20190212505Abstract: An example photonic integrated circuit includes a transmitter circuit with a optical communication path to an optical coupler configured to couple with an optical fiber. The optical communication path has a propagation direction away from the transmitter circuit and towards the optical coupler. A counter-propagating tap diverts light sent by a light source backward against the propagation direction of the optical communication path. A photodiode receives the diverted light and measures its power level. The photodiode generates a feedback signal for the optical coupler and provides the feedback signal to the optical coupler. The optical coupler receives the feedback signal and adjusts a coupling alignment of the optical communication path to the optical fiber based on the feedback signal, which indicates the measured power level of the diverted counter-propagating light.Type: ApplicationFiled: March 15, 2019Publication date: July 11, 2019Inventors: Brandon W. Buckley, Brian Robert Koch, John Garcia, Jared Bauters, Sudharsanan Srinivasan, Anand Ramaswamy