Patents by Inventor Vincent Houtsma

Vincent Houtsma 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).

  • Publication number: 20220239371
    Abstract: The method includes receiving, at a first optical communication device, feedback information on training of a neural network from at least one second optical communication device, the neural network configured to process a signal received from the first optical communication device, the feedback information at least including a training performance indication for training of the neural network conducted at the at least one second optical communication device; updating, based on the feedback information, a first initial parameter value set for the neural network maintained at the first optical communication device, to obtain a second initial parameter value set for the neural network; and transmitting the second initial parameter value set to at least one further second optical communication device, for training of the neural network to be conducted at the at least one further second optical communication device based on the second initial parameter value set.
    Type: Application
    Filed: January 20, 2022
    Publication date: July 28, 2022
    Applicant: Nokia Solutions and Networks Oy
    Inventors: Wenyi XU, Dongxu ZHANG, Chenhui YE, Vincent HOUTSMA, Jilan XU, Yuyang ZHANG
  • Publication number: 20220123863
    Abstract: Various example embodiments for supporting forward error correction (FEC) in a communication system are presented. Various example embodiments for supporting FEC in a communication system may include the selection of a FEC setting for a communication channel from a transmitter to a receiver, e.g., the selection of a FEC setting for a communication channel, the selection of a FEC setting for a data burst sent over a communication channel, the selection of a FEC setting for a portion of a data burst sent over a communication channel, switching between FEC settings for different portions of a data burst over a communication channel, or the like, as well as various combinations thereof.
    Type: Application
    Filed: September 9, 2021
    Publication date: April 21, 2022
    Inventors: Yannick Lefevre, Adriaan de Lind van Wijngaarden, Jochen Maes, Vincent Houtsma, Doutje Van Veen, Amitkumar Mahadevan, Michaƫl Fivez
  • Patent number: 11309973
    Abstract: A passive optical network having an optical-signal monitor configured to monitor carrier-wavelength drifts during optical bursts transmitted between the optical line terminal and optical network units thereof. In an example embodiment, the optical-signal monitor uses heterodyne beating between two differently delayed portions of an optical burst to generate an estimate of the carrier-wavelength drift during that optical burst. The passive optical network may also include an electronic controller configured to use the estimates generated by the optical-signal monitor to make configuration changes at the optical network units and/or implement other control measures directed at reducing to an acceptable level the amounts of carrier-wavelength drift during the optical bursts and/or mitigating some adverse effects thereof.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: April 19, 2022
    Assignee: NOKIA SOLUTIONS AND NETWORKS OY
    Inventors: Vincent Houtsma, Doutje van Veen
  • Publication number: 20210281501
    Abstract: Various example embodiments for supporting forward error correction (FEC) in a communication system are presented. Various example embodiments for supporting FEC in a communication system may include selection of a FEC setting (e.g., an amount of puncturing and/or shortening of a FEC code, a FEC code, or the like) for a communication channel from a transmitter to a receiver based on channel characteristic information of the communication channel from the transmitter to the receiver (e.g., transfer function information, channel loss information, noise characteristic information, error information (e.g., bit error rate, error modeling, or the like), or the like). Various example embodiments for supporting FEC in a communication system, based on selection of a FEC setting for a communication channel based on channel characteristic information of the communication channel, may be applied within various types of communication systems, including various types of wired and/or wireless communication systems.
    Type: Application
    Filed: March 6, 2020
    Publication date: September 9, 2021
    Inventors: Amitkumar Mahadevan, Doutje Van Veen, Noriaki Kaneda, Vincent Houtsma, Paul Cautereels, Carl Mertens, Michael Fivez
  • Publication number: 20190253152
    Abstract: A PON having an OLT configured to send downlink transmissions to ONUs using amplitude modulation and two symbol rates. An example ONU includes a clock-recovery circuit capable of continuous clock extraction from the received variable-rate modulated optical signal. The continuous clock extraction can be achieved, e.g., by (i) configuring the photodetector to convert the higher-rate portions of the received optical signal into transformed electrical waveforms while converting the lower-rate portions thereof into similar electrical waveforms and (ii) configuring the clock-recovery circuit to phase-align the clock signal with signal transitions in the resulting sequence of transformed and similar electrical waveforms. An ONU configured to operate in this manner can advantageously stay locked to the received data signal during transmissions at both symbol rates, without the need to reacquire the clock signal at each rate change and/or at the beginning of each packet intended for the host ONU.
    Type: Application
    Filed: February 14, 2018
    Publication date: August 15, 2019
    Applicant: Nokia Solutions and Networks OY
    Inventors: Vincent Houtsma, Doutje van Veen
  • Publication number: 20190238235
    Abstract: A passive optical network having an optical-signal monitor configured to monitor carrier-wavelength drifts during optical bursts transmitted between the optical line terminal and optical network units thereof. In an example embodiment, the optical-signal monitor uses heterodyne beating between two differently delayed portions of an optical burst to generate an estimate of the carrier-wavelength drift during that optical burst. The passive optical network may also include an electronic controller configured to use the estimates generated by the optical-signal monitor to make configuration changes at the optical network units and/or implement other control measures directed at reducing to an acceptable level the amounts of carrier-wavelength drift during the optical bursts and/or mitigating some adverse effects thereof.
    Type: Application
    Filed: January 31, 2018
    Publication date: August 1, 2019
    Inventors: Vincent Houtsma, Doutje van Veen
  • Publication number: 20190207702
    Abstract: A coherent optical receiver capable of receiving data encoded in optical bursts whose optical power can vary significantly from burst to burst. In an example embodiment, the coherent optical receiver comprises a variable optical attenuator connected between an optical local oscillator and an optical hybrid and configured to controllably vary the intensity of the local-oscillator signal in response to a control signal generated by a control circuit. In an example embodiment, the control circuit is configured to generate the control signal for the variable optical attenuator using power-control settings read from a memory and further using a transmission schedule according to which different remote optical transmitters are scheduled to transmit their respective optical bursts. The power-control settings can be loaded into the memory, e.g., using a suitable calibration method configured to determine a respective nearly optimal coherent gain for receiving data from each of the remote optical transmitters.
    Type: Application
    Filed: December 29, 2017
    Publication date: July 4, 2019
    Applicant: Nokia Solutions and Networks OY
    Inventors: Doutje van Veen, Vincent Houtsma
  • Publication number: 20190074908
    Abstract: A coherent optical receiver having an analog electrical circuit connected to combine the outputs of multiple photodetectors to generate an electrical output signal from which the data encoded in a received modulated optical signal can be recovered in a robust and straightforward manner. In an example embodiment, the analog electrical circuit includes one or more transimpedance amplifiers connected between the photodetectors and the receiver's output port. The coherent optical receiver may include a dual-polarization optical hybrid coupled to eight photodiodes to enable polarization-insensitive detection of the received modulated optical signal. The signal processing implemented in the analog electrical circuit advantageously enables the use of relatively inexpensive local-oscillator sources that may have relaxed specifications with respect to linewidth and wavelength stability.
    Type: Application
    Filed: September 6, 2017
    Publication date: March 7, 2019
    Applicant: Nokia Solutions and Networks OY
    Inventors: Sian Chong Lee, Vincent Houtsma, Doutje van Veen, Chen Zhu, Noriaki Kaneda, Michael Eggleston
  • Patent number: 8676009
    Abstract: An optical device includes a waveguide slab, first and second input port couplers, and first and second output port couplers located over a planar optical substrate. The waveguide slab has a plane of symmetry. The first and second input port couplers extend from the waveguide slab and have an input coupler pair axis located about midway between the first and second input port couplers. The input coupler pair axis is offset at a nonzero first distance from the plane of symmetry. The first and second output port couplers extend from the waveguide slab and have an output coupler pair axis located about midway between the first and second output port couplers. The output coupler pair axis is offset at a different nonzero second distance from the plane of symmetry.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: March 18, 2014
    Assignee: Alcatel Lucent
    Inventors: Nils Weimann, Vincent Houtsma, Mohand Achouche
  • Publication number: 20120237153
    Abstract: An optical device includes a waveguide slab, first and second input port couplers, and first and second output port couplers located over a planar optical substrate. The waveguide slab has a plane of symmetry. The first and second input port couplers extend from the waveguide slab and have an input coupler pair axis located about midway between the first and second input port couplers. The input coupler pair axis is offset at a nonzero first distance from the plane of symmetry. The first and second output port couplers extend from the waveguide slab and have an output coupler pair axis located about midway between the first and second output port couplers. The output coupler pair axis is offset at a different nonzero second distance from the plane of symmetry.
    Type: Application
    Filed: May 20, 2011
    Publication date: September 20, 2012
    Inventors: Nils Weimann, Vincent Houtsma, Mahand Achouche
  • Patent number: 8224134
    Abstract: An optoelectronic receiver and associated method of operation.
    Type: Grant
    Filed: April 3, 2009
    Date of Patent: July 17, 2012
    Assignee: Alcatel-Lucent USA Inc.
    Inventors: Yves Baeyens, Young-Kai Chen, Vincent Houtsma, Andreas Leven, Nils Guenter Weimann
  • Publication number: 20100254651
    Abstract: An optoelectronic receiver and associated method of operation.
    Type: Application
    Filed: April 3, 2009
    Publication date: October 7, 2010
    Applicant: ALCATEL-LUCENT USA INC.
    Inventors: Yves BAEYENS, Young-Kai CHEN, Vincent HOUTSMA, Andreas LEVEN, Nils Guenter WEIMANN
  • Publication number: 20070014508
    Abstract: An optical integrated circuit comprises a semiconductor body, a semiconductor optical waveguide located on the body, and a bipolar phototransistor located on and optically coupled to the waveguide. In a preferred embodiment, the base region of the transistor is configured to absorb radiation propagating in the waveguide, but the emitter and collector regions are both configured not to absorb the propagating radiation. In a further preferred embodiment, the waveguide is configured to guide the radiation along a propagation axis therein, and the transistor makes an elongated footprint along the waveguide, the footprint being elongated along the direction of the propagation axis. In another preferred embodiment, the footprint is at least three times longer along the propagation axis than along a direction perpendicular thereto.
    Type: Application
    Filed: July 13, 2005
    Publication date: January 18, 2007
    Inventors: Young-Kai Chen, Vincent Houtsma, Andreas Leven, Nils Weimann
  • Publication number: 20050269594
    Abstract: Apparatus comprising: a first compound semiconductor composition layer doped to have a first charge carrier polarity; a second compound semiconductor composition layer doped to have a second charge carrier polarity and located on the first layer; a third compound semiconductor composition layer doped to have the first charge carrier polarity and located on the second layer; a base electrode on the second layer; and a spacer ring interposed between and defining a charge carrier access path distance between the base electrode and the third layer, the path distance being within a range of between about 200 ? and about 1000 ?. Techniques for making apparatus. Apparatus is useful as a heterobipolar transistor, particularly for high frequency applications.
    Type: Application
    Filed: June 3, 2004
    Publication date: December 8, 2005
    Applicant: Lucent Technologies, Inc.
    Inventors: Young-Kai Chen, Vincent Houtsma, Nils Weimann
  • Publication number: 20050156195
    Abstract: A method for fabricating a bipolar transistor includes forming a vertical sequence of semiconductor layers, forming an implant mask on the last formed semiconductor layer, and implanting dopant ions into a portion of one or more of the semiconductor layers. The sequence of semiconductor layers includes a collector layer, a base layer that is in contact with the collector layer, and an emitter layer that is in contact with the base layer. The implanting uses a process in which the implant mask stops dopant ions from penetrating into a portion of the sequence of layers.
    Type: Application
    Filed: March 14, 2005
    Publication date: July 21, 2005
    Inventors: Young-Kai Chen, Lay-Lay Chua, Vincent Houtsma, Rose Kopf, Andreas Leven, Chun-Ting Liu, Wei-Jer Sung, Yang Yang