FiWi Optical Cannula

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  • The FiWi Optical┬áCannulas are designed to be chronically implanted on the skull of an animal. The base of the receptacle is smaller to facilitate the implantation. The optical fiber is connectorized to an LED, that brings the light directly into a specific brain area. The LED activation is done by the headstage and the delivering light intensity could be modulated┬áthroughout the experiment (0-100%, DC to 1000 Hz, different pulse shapes). The length of the fiber is customized within 0.1┬ámm tolerance.┬á

    The cannula has an electrical connector to hold the fiberless and wireless headstage in place. Between experiments, the headstage can be easily disconnected from the cannula and reconnected at the appropriate time.

    • Choice of Fiberless & Wireless Headstage must match the type of chosen FiWi Cannula.
    • FiWi Test Cannula is a replica of the FiWi Opto-electric Cannula that can be connected to any Fiberless & Wireless Headstage.
    • The FiWi Test Cannula can be used to test the headstage functions and the illumination patterns in the conditions of the experiment.
  • Optical fiber - 200 ┬Ám - NA 0.66
    - 400 ┬Ám - NA 0.66
    LED power @ 150 mA
    * fibre 200/250 ┬Ám - NA0.66)
    - 465 nm - 8.0 mW (256mW/mm┬▓)
    - 525 nm - 3.5 mW (112mW/mm┬▓)
    - 595 nm - 1.5 mW (48mW/mm┬▓)
    - 635 nm - 4.0 mW (128mW/mm┬▓)
    Dimensions 10 mm x 10 mm x 7 mm
    Mass 0.3 g
  • Click to download the Application Note

    The light propagation into brain tissue will vary with the optical fiber type and the light source parameters.  It can be visualized in this 
    Application Note (the French version is available here).

    Description Drawing Code Note
    Flat Tip FLT
    Conical Tip



    Rounded tip thickness: ~0.1x to 0.2x core diameter

    Standard angles: 45°, 60°

    Other angles on request (max 60┬░)

    Taper Tip TAPER 
  • Fiberless and Wireless Optogenetically Synchronized Electrophysiology System
      User Manual
    FiWi Cannula