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 language | English |
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Title of host publication | OMN 2019 - 2019 International Conference on Optical MEMS and Nanophotonics, Proceedings |
Publisher | IEEE Computer Society |
Pages | 8-9 |
Number of pages | 2 |
ISBN (Electronic) | 9781728145013 |
DOIs | |
State | Published - Jul 2019 |
Event | 2019 International Conference on Optical MEMS and Nanophotonics, OMN 2019 - Daejeon, Korea, Republic of Duration: 28 Jul 2019 → 1 Aug 2019 |
Publication series
Name | International Conference on Optical MEMS and Nanophotonics |
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Volume | 2019-July |
ISSN (Print) | 2160-5033 |
ISSN (Electronic) | 2160-5041 |
Conference
Conference | 2019 International Conference on Optical MEMS and Nanophotonics, OMN 2019 |
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Country/Territory | Korea, Republic of |
City | Daejeon |
Period | 28/07/19 → 1/08/19 |
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