Patents Represented by Attorney John C. Gorecki, Esq.
  • Patent number: 6996144
    Abstract: Apparatus and method for stabilizing the wavelength of a tunable laser to a target wavelength, by correspondingly adjusting the electrooptical performance of the laser's gain medium, whereby to eliminate the frequency shift due to vibrational factors. The electrooptical performance of the laser's gain medium is adjusted, in the case of an electrically pumped laser, by changing the injection current used to pump the laser; and the electrical performance of the laser's gain medium is adjusted, in the case of an optically pumped laser, by changing the intensity of the pump laser used to energize the laser. The system is implemented with a feedback mechanism.
    Type: Grant
    Filed: April 20, 2004
    Date of Patent: February 7, 2006
    Assignee: Nortel Networks Ltd.
    Inventor: Parviz Tayebati
  • Patent number: 6965925
    Abstract: A server provides media and telephony services in a telecommunications network. The server has a distributed, object-oriented software architecture, allowing client applications to access resources located anywhere in the network. The server provides interfaces to media and telephony resources so that client applications, which may access the server through an IP data network, can access the resources. The software architecture framework is provided by Common Object Request Broker Architecture (CORBA).
    Type: Grant
    Filed: December 31, 1998
    Date of Patent: November 15, 2005
    Assignee: Nortel Networks, Ltd
    Inventors: Charles Kevin Shank, R. Alberto Villarica
  • Patent number: 6947547
    Abstract: A management system for telecommunication switch is described. The management system is useful for providing operations, administration and maintenance (OAM) functions in a terabit switch. The management system is a scalable management system, whereby processing of large amounts of network management traffic from carrier operators and virtual private network (VPN) customers in a terabit switch is enabled. The management system is efficiently implemented by utilizing surplus processing resources in the network interface cards of the switch. The management system includes a protocol unit residing on a first processor card of the switch for receiving a management request, a first request unit residing on the first processor card for creating a request object in response to the received management request, and a first action unit residing on a first network interface card of the switch for executing the received management request in response to an instruction from the request object.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: September 20, 2005
    Assignee: Nortel Networks, Ltd.
    Inventors: Derek C. L. Cheung, Carson K. M. Cheung, Mircea Trifan
  • Patent number: 6842468
    Abstract: Apparatus for use in tuning a tunable optical device to a target wavelength, the apparatus comprising: a light source for generating light at a wavelength which is a higher order mode of the operational wavelength of the tunable device; and a wavelength detector and control unit for monitoring the wavelength of light emerging from the tunable device and controlling the tuning voltage applied to the tunable device according to the wavelength of the light emerging from the tunable device.
    Type: Grant
    Filed: March 12, 2003
    Date of Patent: January 11, 2005
    Assignee: Nortel Networks, Ltd.
    Inventors: Hong Chen, Ravi Krishnan Rajan, Peidong Wang
  • Patent number: 6836589
    Abstract: Apparatus for producing a collimated light beam within an optical switch, the apparatus comprising: a supporting structure having a first actuator and a second actuator, the first actuator being selectively adjustable along a first plane, and the second actuator being selectively adjustable along a second plane; a fiber optic line having a terminal end to emit a light beam therefrom, the terminal end of the fiber optic line being supported by the first actuator, whereby adjustment of the first actuator repositions the terminal end of the fiber optic line; and a collimator lens being supported by the second actuator, whereby adjustment of the second actuator repositions the collimator lens; wherein at least one of the terminal end of the fiber optic line and collimator lens is repositioned relative to the other one so as to position the light beam emitted by the terminal end of the fiber optic line through a given location of through the collimator lens, which in turn produces the collimated light beam within
    Type: Grant
    Filed: March 7, 2003
    Date of Patent: December 28, 2004
    Assignee: Nortel Networks, Ltd.
    Inventor: Bajikar Sateeshchandra
  • Patent number: 6831450
    Abstract: Apparatus and methods are provided for measuring a selected optical behavior of a tunable opto-electric device by using the electrical characteristics of the opto-electronic device. The benefit of the present invention is the elimination or reduction in complexity of optical wavelength reference hardware that is currently required for wavelength referencing and locking. Accordingly, the present invention reduces the cost and complexity of the optical packaging of tunable opto-electronic telecommunication components. Furthermore, the present invention also significantly simplifies optical and electronic design of system level products with tunable opto-electronic devices.
    Type: Grant
    Filed: October 3, 2002
    Date of Patent: December 14, 2004
    Assignee: Nortel Networks, Ltd.
    Inventor: Yakov Kogan
  • Patent number: 6784984
    Abstract: A novel method and apparatus has been developed for testing optical circuit modules. More particularly, with the present invention, a given test pack is adapted to “simultaneously” test a plurality of DUT's, by simultaneously apply a given optical signal to each of the plurality of DUT's and allowing each of the DUT's to simultaneously undergo its own testing; the test pack then serially queries each of the DUT's to obtain test results and, if desired, can provide feedback to one or more of the DUT's, whereby the DUT's can be calibrated with the assistance of the test pack. In one preferred form of the invention, all of the plurality of DUT's simultaneously undergoing testing on a given test pack are housed in a single environmental enclosure, permitting all of the DUT's to be simultaneously brought “up to temperature” so as to increase testing throughput.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: August 31, 2004
    Assignee: Nortel Networks, Ltd.
    Inventors: Ronald N. Parente, Paul Boyd, David F. Botros, Peter K. Lison
  • Patent number: 6745244
    Abstract: Methods and systems consistent with the present invention perform enhanced services for wireline and wireless subscribers in an integrated wireline and wireless switching system. The enhanced services may include, for example, group dialing plans, message waiting indicator activation, call forwarding, simultaneous ringing, call conferencing, calling line identification, automatic call back, automatic recall, speed dialing services, and/or any other services that may be provided by a switching system to wireless and/or wireline subscribers.
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: June 1, 2004
    Assignee: Nortel Networks, Ltd.
    Inventors: Barbara Cosgriff, William Gentry, R. Emery Hanzel, Patrick Lee Price, James Ziesig, Chandrakant Gundecha, Gary Steven Franks
  • Patent number: D548003
    Type: Grant
    Filed: August 17, 2006
    Date of Patent: August 7, 2007
    Assignee: Half-Time Ventures, Inc.
    Inventor: Aaron Barth