Implantable wireless neural interface for multichannel neural recording and optogenetic neuromodulation

Daeho Ryu, Saeyoung Jeon, Yong Kweon Kim, Sang Beom Jun, Chang Hyeon Ji

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

This paper presents a low cost, light-weight, and low power consuming wireless neural interface for multichannel neural recording and optogenetic neuromodulation with 470 and 589 nm light sources and a customizable pulse generator. To enhance the light coupling efficiency between the light emitting diode (LED) and 4 x 4 array of optical fibers, microlens array is used. Measured light intensity at the tip of the fiber array is 2.812 and 1.765 mW/mm2 for 470 and 589 nm light sources, respectively. Optical fibers are assembled with 4 x 4 microlens array on a silicon die, which enables the illumination of relatively large area in the brain. To record the neural signal, two zero-drift operational amplifiers and 12-bit ADC (analog-To-digital converter) were used. The sampling frequency on each channel is 16 kHz. A ± 160 μV, 100 Hz sine wave in saline solution was successfully measured and wirelessly transmitted with the fabricated device.

Original languageEnglish
Title of host publicationOMN 2019 - 2019 International Conference on Optical MEMS and Nanophotonics, Proceedings
PublisherIEEE Computer Society
Pages8-9
Number of pages2
ISBN (Electronic)9781728145013
DOIs
StatePublished - Jul 2019
Event2019 International Conference on Optical MEMS and Nanophotonics, OMN 2019 - Daejeon, Korea, Republic of
Duration: 28 Jul 20191 Aug 2019

Publication series

NameInternational Conference on Optical MEMS and Nanophotonics
Volume2019-July
ISSN (Print)2160-5033
ISSN (Electronic)2160-5041

Conference

Conference2019 International Conference on Optical MEMS and Nanophotonics, OMN 2019
Country/TerritoryKorea, Republic of
CityDaejeon
Period28/07/191/08/19

Bibliographical note

Funding Information:
ACKNOWLEDGMENT This work was supported by the Center for Integrated Smart Sensors funded by the Ministry of Science, ICT & Future Planning as Global Frontier Project (CISS-2012M3A6A6054204).

Publisher Copyright:
© 2019 IEEE.

Keywords

  • microlens array
  • neural recording
  • Optogenetics
  • wireless interface

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