Doctoral Thesis: Chemical Sensing as a Utility using Swept-Source Raman Spectroscopy

Tuesday, March 26
4:00 pm - 5:30 pm


By: Nili Persits

Supervisor: Rajeev J. Ram


  • Date: Tuesday, March 26
  • Time: 4:00 pm - 5:30 pm
  • Category:
  • Location: 26-214
Additional Location Details:

Abstract: The dream of integrating chemical sensing into daily life has long persisted without realization. Despite numerous proposed sensor technologies, few meet the criteria of being non-destructive, reagent-free, versatile across applications, scalable, and cost-effective.

In my defense, I present the Swept Source-Raman Spectroscopy Network. This network features an innovative SSRS fiber-probe, enabling precise Raman spectrum measurement with minimal laser excitation and a single-point detector. Leveraging existing optical fiber infrastructure, a 16-sensor network is demonstrated, with scalability to deploy dozens of sensors over vast distances supported by an engineering-based cost model. Environmental water samples and therapeutic-producing cell cultures are monitored, showcasing the network’s efficacy and versatility for pollution mitigation and advanced manufacturing. Through adaptive┬áspectral acquisition using linear regression models and prior knowledge, this sensor architecture competes favorably in both performance and cost with existing solutions, marking a significant advancement towards chemical sensing integration into daily life.