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| Content Provider | IET Digital Library |
|---|---|
| Author | Liu, T. Anders, J. Ortmanns, M. |
| Abstract | A wavelength division multiplexing-based bidirectional optical transcutaneous telemetric data link for brain machine interfaces is reported. By converting the digitised electronic signals to a stream of infrared and visible optical pulses, the optical telemetry wirelessly transmits data between the implanted neural recorder/stimulator and the external control devices. A red visible vertical cavity surface emitting laser (VCSEL) with a peak wavelength of 680 nm is used in the downlink to transmit data from the external base unit to the implant. A near infrared VCSEL with a peak wavelength of 850 nm is utilised in the uplink for data transmission from the implants to the external device. An optical filter is applied to minimise the interference between the two channels. In-vitro experiments show that the uplink is capable of transmitting data at 100 Mbps through 2 mm of porcine skin while the downlink is simultaneously working at a rate of 1 Mbps. The power consumption of the implant part of the telemetry, including the transmitter for the uplink and the receiver for the downlink are 3.2 mW and 290 μW, corresponding to a transmission power efficiencies of 32 and 290 pJ/bit, respectively, which are among the best reported and unseen for bidirectional high-speed transcutaneous communication. |
| Starting Page | 1969 |
| Ending Page | 1971 |
| Page Count | 3 |
| ISSN | 00135194 |
| Volume Number | 51 |
| e-ISSN | 1350911X |
| Issue Number | Issue 24, Nov (2015) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/el/51/24 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/el.2015.1404 |
| Journal | Electronics Letters |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Bidirectional Optical Transcutaneous Telemetric Link Bio-optics Biology And Medical Computing Biomedical Communication Biomedical Imaging/measurement Biomedical Telemetry Biophysics of Neurophysiological Processes Bit Rate 1 Mbit/s Bit Rate 100 Mbit/s Brain Machine Interface Brain-computer Interfaces Channel Interference Computer Assistance For Persons with Handicaps Data Transmission Depth 2 Mm Design of Specific Laser System Digitised Electronic Signal Equipment And System External Control Device Free Space Optical Link Implanted Neural Recorder Implanted Neural Stimulator Infrared Pulses Laser Cavity Resonator Laser Resonator And Cavities Lasing Action in SemiConductor Multiplexing And Switching in Optical Communication Near Infrared VCSEL Neurophysiology Optical And Laser Radiation Optical Coatings And Filter Optical Communication Device Optical Communication Equipment Optical Filter Optical Link Optical Receiver Optical Telemetry Optical Transmitters Orthotics Porcine Skin Power 290 MuW Power 3.2 MW Power Consumption Prosthetics Prosthetics And Other Practical Application Receiver Red Visible Vertical Cavity Surface Emitting Laser Semiconductor Laser Skin Spectral And Other Filter Surface Emitting Laser Diode Telecommunication Channel Telemetry Transmission Power Efficiency Transmitter User InterFace Visible Optical Pulses Wavelength 680 Nm Wavelength 850 Nm Wavelength Division Multiplexing |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
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