• Log in
    View Item 
    •   VTechWorks Home
    • Virginia Tech Patents
    • Virginia Tech Patents
    • View Item
    •   VTechWorks Home
    • Virginia Tech Patents
    • Virginia Tech Patents
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Fiber optic grating-based weighted, two-mode fiber sensors

    Thumbnail
    View/Open
    5208877.pdf (619.6Kb)
    Downloads: 112
    Publication Date
    1993-05-04
    Filing Date
    1991-08-29
    Inventor
    Murphy, Kent A.
    Claus, Richard O.
    Vengsarkar, Ashish
    Fogg, Brian R.
    Greene, Jonathan A.
    Metadata
    Show full item record
    Abstract
    Two-mode, elliptical-core optic fibers with a permanent photo-induced index change are used as sensors with sensitivity varying as a function of length. The optic fiber sensors act as vibrational-mode filters thereby performing initial signal processing of the sensor signal. The sensors are based on photo-induced refractive index changes. These refractive index changes affect the differential phase modulation between the LP.sub.01 and the LP.sub.11.sup.even modes. The change in beat-length is dependent on the amount of strain induced in the fiber while the grating is being formed. The pattern is thus varied along the length of the fiber by straining the fiber in a specific fashion while the grating is being written. This changes the sensitivity, of the sensor along its length. By choosing an appropriate weighting function in the manufacture of the sensor, it is possible to implement vibrational-mode analysis, vibrational-mode filtering and other functions that are critical in control system applications.
    Assignee
    Center for Innovative Technology
    VPI & SU
    Patent Number
    5208877
    Application Number
    7751737
    Source URL
    http://pimg-fpiw.uspto.gov/fdd/77/088/052/0.pdf
    Primary/U.S. Class
    250/227.14
    Other/U.S. Class
    385/12
    385/13
    385/28
    CPC Class
    G01D5/3538
    G02B6/02047
    G02B6/02123
    G02B6/14
    Patent Type
    utility
    URI
    http://hdl.handle.net/10919/72800
    Collections
    • Virginia Tech Patents [545]

    If you believe that any material in VTechWorks should be removed, please see our policy and procedure for Requesting that Material be Amended or Removed. All takedown requests will be promptly acknowledged and investigated.

    Virginia Tech | University Libraries | Contact Us
     

     

    VTechWorks

    AboutPoliciesHelp

    Browse

    All of VTechWorksCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    Log inRegister

    Statistics

    View Usage Statistics

    If you believe that any material in VTechWorks should be removed, please see our policy and procedure for Requesting that Material be Amended or Removed. All takedown requests will be promptly acknowledged and investigated.

    Virginia Tech | University Libraries | Contact Us