Patents by Inventor Alexander Rylyakov

Alexander Rylyakov 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).

  • Patent number: 10756690
    Abstract: In conventional optical receivers the dynamic range is obtained by using variable gain amplifiers (VGA) with a fixed trans-impedance amplifier (TIA) gain. To overcome the SNR problems inherent in conventional receivers an improved optical receiver comprises an automatic gain control loop for generating at least one gain control signal for controlling gain of both the VGA and the TIA. Ideally, both the resistance and the gain of the TIA are controlled by a gain control signal.
    Type: Grant
    Filed: March 3, 2020
    Date of Patent: August 25, 2020
    Assignee: Elenion Technologies, LLC
    Inventors: Mostafa Ahmed, Alexander Rylyakov
  • Publication number: 20200249540
    Abstract: A photonic chip including an integrated optoelectronic device is flip-chip mounted to a carrier. The optoelectronic device is provided with a 3D ground cage as a shield for stray EM radiation. The 3D ground cage is formed by a device ground electrode partially enclosing the optoelectronic device on a face of the chip, a carrier ground electrode disposed opposite to the device ground electrode, and a plurality of metal pillars therebetween at least partially surrounding the optoelectronic device. The optoelectronic device may be an OE converter of an integrated optical receiver. The optoelectronic device may also be an EO converter of an integrated optical transmitter.
    Type: Application
    Filed: February 1, 2019
    Publication date: August 6, 2020
    Inventors: Daihyun Lim, Alexander Rylyakov, Yangjin Ma
  • Publication number: 20200241332
    Abstract: An optical modulator apparatus may include a plurality of segment drivers, each segment driver having a unique offset voltage and driving but a portion or a segment of an electro-optical modulator. A modulating electrical signal may be applied to the segment drivers via a plurality of electrical delays. Parameters of the segment drivers may be selected so as to approximate a pre-defined transfer function, which may include a linear or a non-linear transfer function.
    Type: Application
    Filed: April 13, 2020
    Publication date: July 30, 2020
    Inventors: Ran Ding, Thomas Wetteland Baehr-Jones, Peter D. Magill, Michael J. Hochberg, Alexander Rylyakov
  • Publication number: 20200235820
    Abstract: In optical receivers, cancelling the DC component of the incoming current is a key to increasing the receiver's effectiveness, and therefore increase the channel capacity. Ideally, the receiver includes a DC cancellation circuit for removing the DC component; however, in differential receivers an offset may be created between the output voltage components caused by the various amplifiers. Accordingly, an offset cancellation circuit is required to determine the offset and to modify the DC cancellation circuit accordingly.
    Type: Application
    Filed: April 2, 2020
    Publication date: July 23, 2020
    Inventors: Ariel Leonardo Vera Villarroel, Abdelrahman Ahmed, Alexander Rylyakov
  • Publication number: 20200235705
    Abstract: In optical receivers, extending the transimpedance amplifier's (TIA) dynamic range is a key to increasing the receiver's dynamic range, and therefore increase the channel capacity. Ideally, the TIA requires controllable gain, whereby the receiver can modify the characteristics of the TIA and/or the VGA to process high power incoming signals with a defined maximum distortion, and low power incoming signals with a defined maximum noise. A solution to the problem is to provide TIA's with reconfigurable feedback resistors, which are adjustable based on the level of power, e.g. current, generated by the photodetector, and variable load resistors, which are adjustable based on the change in impedance caused by the change in the feedback resistor.
    Type: Application
    Filed: April 2, 2020
    Publication date: July 23, 2020
    Inventors: Ariel Leonardo Vera Villarroel, Abdelrahman Ahmed, Alexander Rylyakov
  • Publication number: 20200204134
    Abstract: In conventional optical receivers the dynamic range is obtained by using variable gain amplifiers (VGA) with a fixed trans-impedance amplifier (TIA) gain. To overcome the SNR problems inherent in conventional receivers an improved optical receiver comprises an automatic gain control loop for generating at least one gain control signal for controlling gain of both the VGA and the TIA. Ideally, both the resistance and the gain of the TIA are controlled by a gain control signal.
    Type: Application
    Filed: March 3, 2020
    Publication date: June 25, 2020
    Inventors: Mostafa Ahmed, Alexander Rylyakov
  • Patent number: 10687126
    Abstract: Methods and systems for bias control in an optical switch fabric include monitoring optical power at outputs of a plurality of switch elements in an N×N switch fabric that has N inputs, N outputs, and M?2 stages, each switch element having a respective unique radio frequency tone. A bias control of each of the plurality of switch elements is adjusted. It is determined whether the optical power at the outputs of each respective switch element after bias control adjustment conform more closely to a predetermined criterion relative to the monitored optical power at the outputs of the respective switch element prior to adjustment.
    Type: Grant
    Filed: June 8, 2018
    Date of Patent: June 16, 2020
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Nicolas Dupuis, Daniel M. Kuchta, Benjamin G. Lee, Alexander Rylyakov, Clint L. Schow
  • Publication number: 20200186253
    Abstract: A distributed traveling-wave Mach-Zehnder modulator driver having a plurality of modulation stages that operate cooperatively (in-phase) to provide a signal suitable for use in a 100 Gb/s optical fiber transmitter at power levels that are compatible with conventional semiconductor devices and conventional semiconductor processing is described.
    Type: Application
    Filed: November 28, 2019
    Publication date: June 11, 2020
    Inventors: Ran Ding, Thomas Wetteland Baehr-Jones, Michael J. Hochberg, Alexander Rylyakov
  • Patent number: 10656441
    Abstract: An optical modulator apparatus may include a plurality of segment drivers, each segment driver having a unique offset voltage and driving but a portion or a segment of an electro-optical modulator. A modulating electrical signal may be applied to the segment drivers via a plurality of electrical delays. Parameters of the segment drivers may be selected so as to approximate a pre-defined transfer function, which may include a linear or a non-linear transfer function.
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: May 19, 2020
    Assignee: Elenion Technologies, LLC
    Inventors: Ran Ding, Thomas Wetteland Baehr-Jones, Peter D. Magill, Michael J. Hochberg, Alexander Rylyakov
  • Publication number: 20200142274
    Abstract: A multi-section optical modulator and related method are disclosed wherein two waveguide arms traverse a plurality of successive modulating sections. A differential drive signal is applied separately to each waveguide arm of each modulating sections in synchronism with the transmission of light along the waveguide arms, affecting a dual differential driving of each section. By suitably selecting the number of modulating sections and the section length, a high modulation bandwidth and a high modulation efficiency may be achieved simultaneously for a given peak-to-peak voltage swing of the drive signal.
    Type: Application
    Filed: January 6, 2020
    Publication date: May 7, 2020
    Inventors: Christopher Williams, Mostafa Ahmed, Alexander Rylyakov, Richard C. Younce, Yang Liu, Ran Ding, Abdelrahman Ahmed
  • Patent number: 10644652
    Abstract: In optical receivers, extending the transimpedance amplifier's (TIA) dynamic range is a key to increasing the receiver's dynamic range, and therefore increase the channel capacity. Ideally, the TIA requires controllable gain, whereby the receiver can modify the characteristics of the TIA and/or the VGA to process high power incoming signals with a defined maximum distortion, and low power incoming signals with a defined maximum noise. A solution to the problem is to provide TIA's with reconfigurable feedback resistors, which are adjustable based on the level of power, e.g. current, generated by the photodetector, and variable load resistors, which are adjustable based on the change in impedance caused by the change in the feedback resistor.
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: May 5, 2020
    Assignee: Elenion Technologies, LLC
    Inventors: Ariel Leonardo Vera Villarroel, Abdelrahman Ahmed, Alexander Rylyakov
  • Patent number: 10644805
    Abstract: In optical receivers, cancelling the DC component of the incoming current is a key to increasing the receiver's effectiveness, and therefore increase the channel capacity. Ideally, the receiver includes a DC cancellation circuit for removing the DC component; however, in differential receivers an offset may be created between the output voltage components caused by the various amplifiers. Accordingly, an offset cancellation circuit is required to determine the offset and to modify the DC cancellation circuit accordingly.
    Type: Grant
    Filed: October 29, 2019
    Date of Patent: May 5, 2020
    Assignee: Elenion Technologies, LLC
    Inventors: Ariel Leonardo Vera Villarroel, Abdelrahman Ahmed, Alexander Rylyakov
  • Publication number: 20200136560
    Abstract: Modern modulator drivers must be capable of delivering a large output voltage into a tens of ohms modulator, while minimizing the amount of distortion added by the driver. The driver should deliver the output voltage without exceeding a maximum distortion while minimizing the DC power consumption. Accordingly, a modulator driver includes a final stage amplifier with auxiliary transistors that turn on when the conventional differential pair of transistors approaches their maximum voltage of the linear region of their transfer function, thereby providing a more linear transfer function, in particular at large input voltages.
    Type: Application
    Filed: October 29, 2018
    Publication date: April 30, 2020
    Inventors: Ariel Leonardo Vera Villarroel, Mohamed Megahed Mabrouk Megahed, Alexander Rylyakov
  • Publication number: 20200137467
    Abstract: Methods and systems for bias control in an optical switch fabric include monitoring optical power at outputs of a plurality of switch elements in an N×N switch fabric that has N inputs, N outputs, and M?2 stages, each switch element having a respective unique radio frequency tone. A bias control of each of the plurality of switch elements is adjusted. It is determined whether the optical power at the outputs of each respective switch element after bias control adjustment conform more closely to a predetermined criterion relative to the monitored optical power at the outputs of the respective switch element prior to adjustment.
    Type: Application
    Filed: June 8, 2018
    Publication date: April 30, 2020
    Inventors: Nicolas Dupuis, Daniel M. Kuchta, Benjamin G. Lee, Alexander Rylyakov, Clint L. Schow
  • Publication number: 20200112374
    Abstract: A high data rate, high sensitivity, low power optical link using low-bandwidth components and low-bandwidth E/O drivers and receivers and method of building same. The method is based on the idea of making the optical part of the link look like a bandwidth limited lossy electrical channel, so that the powerful equalization methods used in the wireline electrical links can be applied to recover the transmitted data in a situation with low bandwidth and/or high loss and strong inter-symbol interference. Linear and non-linear optical channel components, E/O drivers and receivers can benefit from the apparatus and the methods of the invention.
    Type: Application
    Filed: November 28, 2019
    Publication date: April 9, 2020
    Inventors: Alexander Rylyakov, Richard Younce, Ran Ding, Peter D. Magill, Hao Li, Michael J. Hochberg
  • Patent number: 10615763
    Abstract: In conventional optical receivers the dynamic range is obtained by using variable gain amplifiers (VGA) with a fixed trans-impedance amplifier (TIA) gain. To overcome the SNR problems inherent in conventional receivers an improved optical receiver comprises an automatic gain control loop for generating at least one gain control signal for controlling gain of both the VGA and the TIA. Ideally, both the resistance and the gain of the TIA are controlled by a gain control signal.
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: April 7, 2020
    Assignee: Elenion Technologies, LLC
    Inventors: Mostafa Ahmed, Alexander Rylyakov
  • Publication number: 20200091881
    Abstract: In conventional high data rate receivers, the transmitted optical signal has poor extinction ratio and translates into a small modulated current with a large DC current, which saturates the receiver TIA and amplifiers, and significantly degrades the gain and bandwidth performance. Consequently, cancelling PD DC current in high data rate receivers is desired for proper operation. Differential TIA schemes, i.e. providing separate AC-coupled and DC-coupled paths, in parallel, provide better linearity for large input currents and low gain settings. To AC couple the PD to the TIA using passive AC-coupling circuitry, an AC-coupling capacitor (CC) is positioned between the PD and the TIA to block the DC current, while passing the modulated AC current to the TIA. A DC cancellation circuit may be provided, without a capacitor, to maintain the receiver input bias while suppressing any DC component generated by the PD for the DC-coupled path.
    Type: Application
    Filed: August 27, 2019
    Publication date: March 19, 2020
    Inventors: Daihyun Lim, Alexander Rylyakov
  • Publication number: 20200092010
    Abstract: In optical receivers, cancelling the DC component of the incoming current is a key to increasing the receiver's effectiveness, and therefore increase the channel capacity. Ideally, the receiver includes a DC cancellation circuit for removing the DC component; however, in differential receivers an offset may be created between the output voltage components caused by the various amplifiers. Accordingly, an offset cancellation circuit is required to determine the offset and to modify the DC cancellation circuit accordingly.
    Type: Application
    Filed: October 29, 2019
    Publication date: March 19, 2020
    Inventors: Ariel Leonardo Vera Villarroel, Abdelrahman Ahmed, Alexander Rylyakov
  • Publication number: 20200083855
    Abstract: In optical receivers, extending the transimpedance amplifier's (TIA) dynamic range is a key to increasing the receiver's dynamic range, and therefore increase the channel capacity. Ideally, the TIA requires controllable gain, whereby the receiver can modify the characteristics of the TIA and/or the VGA to process high power incoming signals with a defined maximum distortion, and low power incoming signals with a defined maximum noise. A solution to the problem is to provide TIA's and VGA's with reconfigurable sizes, which are adjustable based on the level of power, e.g. current, generated by the photodetector.
    Type: Application
    Filed: September 10, 2018
    Publication date: March 12, 2020
    Inventors: Ariel Leonardo Vera Villarroel, Abdelrahman Ahmed, Alexander Rylyakov
  • Publication number: 20200083846
    Abstract: In optical receivers, extending the transimpedance amplifier's (TIA) dynamic range is a key to increasing the receiver's dynamic range, and therefore increase the channel capacity. Ideally, the TIA requires controllable gain, whereby the receiver can modify the characteristics of the TIA and/or the VGA to process high power incoming signals with a defined maximum distortion, and low power incoming signals with a defined maximum noise. A solution to the problem is to provide TIA's with reconfigurable feedback resistors, which are adjustable based on the level of power, e.g. current, generated by the photodetector, and variable load resistors, which are adjustable based on the change in impedance caused by the change in the feedback resistor.
    Type: Application
    Filed: September 10, 2018
    Publication date: March 12, 2020
    Inventors: Ariel Leonardo Vera Villarroel, Abdelrahman Ahmed, Alexander Rylyakov