Fig. 4. Loading biometric and control information into optical domain without disrupting digital information.
The working wavelength is 1551.4656 nm. All presented transmissions are normalized. (A) Electrical connection between BOIMUX and TEB scanner. Electrode A of BOIMUX is connected to the single electrode of TEB scanner, while electrode B is grounded. (B) Conversion from Ebio to Obio upon palm interaction. (C) Zoom in of (B) for the analysis of Ebio to Obio conversion. (D) Explanation of the observed Ebio to Obio conversion using schematic spectra of Obio under different Ebio’s at different states. (E) Conversion from Econtrol to Ocontrol when finger sweeps across the 111 digitized electrode. (F to I) Multiplexed ObioOinfo and OcontrolOinfo (cyan) generated by using Ebio and Econtrol (blue) to modulate Oinfo (green) and the corresponding extracted biometric information OLPbio and control information OLPcontrol (red) using a 1-kHz FFT low-pass filter. (F) Upon palm interaction. (G) Zoom in of (F). (H) Upon finger sweep. (I) Zoom in of (H).