Abstract
This paper highlights the effectiveness of photo-thermal plasmonic sensors in enabling real-time closed-loop stabilization of photonic devices. To assess the waveguided optical power, the in-line detector leverages the photo-thermal resistance variation of a micrometric plasmonic strip in contact with the waveguide. The generated signal is used to lock to resonance a ring resonator against wavelength and temperature variations, in a silicon-based technology. Thanks to the high sensitivity of the detector and its limited penalty on the waveguide loss, automatic re-tuning of the ring resonator with a recovery time of
$20 \,\mathrm{m}\mathrm{s}$
has been successfully achieved. The micrometric dimensions of the sensor, its technological simplicity, and the delivered signal (proportional to the optical power) make the photo-thermal plasmonic sensor an attractive in-line candidate for closed-loop control of optical devices, regardless of the technology employed for the photonic chip fabrication.
PDF Article
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription