Multiple-Point Raman Spectroscopic Analysis Via Optical Multiplexing

  • Technology Readiness Level: Proof of Concept


Researchers at Purdue University have developed a new optical Raman spectroscopy system. Current Raman spectroscopy techniques are not suited for large spatial scales and field – relevant chemical concentrations. The Purdue technology enables Raman analysis at multiple spatially-dispersed locations using a single source-detector unit, facilitating long-term, spatially dispersed monitoring and enabling low cost-per-test-point sensing. This invention has applications to sensing of environmentally- and industrially-relevant compounds, particularly when analysis/monitoring is required at multiple points or over large spatial extent. Technology Validation: In a series of tests, Raman analysis was successfully carried out from a single source and detector unit to examine test points 1 to 16 m from the unit. Modelling of instrument performance demonstrates the potential to reach 1000-2000 m at field-/industrially-relevant concentrations.



  • single detector
  • long-term
  • spatially-dispersed analysis

Potential Applications

  • industrially – relevant compounds
  • sensing of environmentally

Contact Information

Name: Dhananjay Sewak


Phone: 765-588-3482