Mems structure with surface potential control

    公开(公告)号:AU2002361551A1

    公开(公告)日:2003-04-22

    申请号:AU2002361551

    申请日:2002-07-22

    Abstract: In an electrostatically controlled apparatus, such as a MEMS array having cavities formed around electrodes and which is mounted directly on a dielectric substrate in which are embedded electrostatic actuation electrodes disposed in alignment with the individual MEMS elements, a mechanism is provided to controllably neutralize excess charge and establish a controlled potential between the MEMS elements and the electrostatic actuation electrodes.

    Method for calibrating a free-space-coupled fiber-optic transmission system

    公开(公告)号:AU2002329734A1

    公开(公告)日:2003-03-03

    申请号:AU2002329734

    申请日:2002-08-09

    Abstract: A method is provided for calibrating a free-space-coupled fiber-optic transmission system. The method uses signal content in the measured coupled power at frequencies equal to the sum, difference, and first harmonics of the frequencies of control-related dither signals to infer and correct errors in the kinematical model used to apply the dithers. The technique can operate independently or simultaneously with dither-based functions such as alignment control and power attenuation to provide continuous tracking of model terms. The calibration method does not require that any calibration-specific signals be injected into the system, or that the operation of primary functions be halted for the purpose of calibration.

    METHOD AND SYSTEM FOR MANAGING OPTICAL DISTRIBUTION NETWORK

    公开(公告)号:CA2850933C

    公开(公告)日:2016-11-08

    申请号:CA2850933

    申请日:2012-10-02

    Inventor: HE XIONGWEI

    Abstract: A method for generating optical paths in a photonic network is provided. A model of a photonic network is used to store relationship information that describes the relationships between photonic network elements, as well as configuration information about the elements of the photonic network. A path manager receives a request to generate one or more paths based on an input port and one or more output ports. Using the information stored in the photonic network model, the path manager generates one or more candidate paths.

    METHOD AND SYSTEM FOR MANAGING OPTICAL DISTRIBUTION NETWORK

    公开(公告)号:CA2850933A1

    公开(公告)日:2013-04-18

    申请号:CA2850933

    申请日:2012-10-02

    Inventor: HE XIONGWEI

    Abstract: A method for generating optical paths in a photonic network is provided. A model of a photonic network is used to store relationship information that describes the relationships between photonic network elements, as well as configuration information about the elements of the photonic network. A path manager receives a request to generate one or more paths based on an input port and one or more output ports. Using the information stored in the photonic network model, the path manager generates one or more candidate paths.

    METHOD AND APPARATUS FOR OPTICAL BEAM ALIGNMENT DETECTION AND CONTROL

    公开(公告)号:CA2457934C

    公开(公告)日:2011-09-20

    申请号:CA2457934

    申请日:2002-08-09

    Abstract: Methods and apparatus are provided for detection and control of multiple-axis active alignment for a free-space-coupled single-mode fiber-optic transmission system that automatically optimizes the coupling through the system. In a specific embodiment, a measurement of coupled power is made and error signals are used to control actuation via four axes of beam steering element to null four generally orthogonal alignment errors of the beam between the input (12) and output fibers (14). The four alignment errors are detected using a synchronous-detection approach. A feedback control system (100) nulls the four errors.

    CHARGING GUARD WITH PASCHEN STACKING

    公开(公告)号:CA2668956C

    公开(公告)日:2010-11-09

    申请号:CA2668956

    申请日:2007-11-13

    Abstract: A MEMS-based mirror is provided with trenches between adjacent electrodes in order to be able to withstand relatively high applied voltages, and thus has a substantially reduced exposure to uncontrolled surface potentials. The MEMS-based mirror, thus avoids voltage drifts and has an improved mirror position stability. The trench dimensions are selected such that the voltage applied between each adjacent pair of electrodes stays within predefined limits. An insulating layer, such as silicon dioxide, electrically isolates each pair of adjacent electrodes. Each insulting layer extends partially above an associated trench and is characterized by the same height and width dimensions.

    CHARGING GUARD WITH PASCHEN STACKING

    公开(公告)号:CA2668956A1

    公开(公告)日:2008-05-22

    申请号:CA2668956

    申请日:2007-11-13

    Abstract: A MEMS-based mirror is provided with trenches between adjacent electrodes in order to be able to withstand relatively high applied voltages, and thus has a substantially reduced exposure to uncontrolled surface potentials. Th e MEMS-based mirror, thus avoids voltage drifts and has an improved mirror p osition stability. The trench dimensions are selected such that the voltage applied between each adjacent pair of electrodes stays within predefined lim its. An insulating layer, such as silicon dioxide, electrically isolates eac h pair of adjacent electrodes. Each insulting layer extends partially above an associated trench and is characterized by the same height and width dimen sions.

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