Self-sensing of Temperature Rises on Light Emitting Diode Based Optrodes

  1. Lookup NU author(s)
  2. Dr Fahimeh Dehkhoda
  3. Dr Nilhil Ponon
  4. Professor Andrew Jackson
  5. Professor Anthony O'Neill
  6. Dr Patrick Degenaar
Author(s)Dehkhoda Fahimeh, Soltan Ahmed, Ponon Nikhil, Jackson Andrew, O'Neill Anthony, Degenaar Patrick
Publication type Article
JournalJournal of Neural Engineering
Pagese-pub ahead of print
ISSN (print)1741-2560
ISSN (electronic)1741-2552
Full text is available for this publication:
This work presents a method to determine the surface temperature of microphotonic medical implants like LEDs. Our inventive step is to use the photonic emitter (LED) employed in an implantable device as its own sensor and develop readout circuitry to accurately determine the surface temperature of the device. There are two primary classes of applications where microphotonics could be used in implantable devices; opto-electrophysiology, and fluorescence sensing. In such scenarios, intense light needs to be delivered to the target. As blue wavelengths are scattered strongly in tissue, such delivery needs to be either via optic fibres, two-photon approaches, or through local emitters. In the latter case, as light emitters generate heat, there is a potential for probe surfaces to exceed the 2OC regulatory. However, currently, there are no convenient mechanisms to monitor this in-situ. This paper, therefore, presents a method to utilize the light emitting diode as its own temperature sensor. We present the electronic control circuit and calibration method to achieve this. Efficacy is demonstrated in air, saline, and brain.
PublisherInstitute of Physics
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