Disposable MEMS optrode array integrated with single LED for neurostimulation

Sunghyun Yoo, Hongkyun Lee, Sang Beom Jun, Yong Kweon Kim, Chang Hyeon Ji

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


We present an LED-waveguide-based neural probe array with the highest total light power delivery from a single commercial LED. A separable configuration between the LED and the waveguide has been proposed and verified experimentally for a disposable probe tip. The system comprises of a disposable MEMS optrode array and a reusable unit. The optrode array consists of a 4 × 4 array of 6 mm-long optical fibers assembled with thermally reflowed square-shaped glass microlenses. The reusable unit includes a domed top LED and driving circuitry. Measured light delivery efficiency of the optrode array and the total power efficiency of the probe were −10.6 dB and −21.6 dB, respectively.

Original languageEnglish
Pages (from-to)276-284
Number of pages9
JournalSensors and Actuators, A: Physical
StatePublished - 15 Apr 2018


  • Light Emitting Diode (LED)
  • Neural probe
  • Neurostimulation
  • Optrode


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