A fully electronic variable optical attenuator in the near-infrared region is reported. The observed attenuation varied from 0 to 19.24 dB. The device is enabled by the strong correlation between the electrical and optical properties in vanadium dioxide thin films across its phase transition. A self-sensing feedback approach is used to significantly reduce the inherently hysteretic behavior of the film. The reduction of the hysteresis, sensing the electrical resistance with respect to the optical transmission, allowed for a relatively simple approach for the modeling and control of the system.
No takes yet. Share an insight, caveat, or question.
Dávila et al. (2014) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: