Abstract
Evanescent wave absorption spectroscopy (EWAS) based sensors offer a number of unique advantages which include compatibility with remote optical sensing, simplicity of sensor design, low cost of sensing elements, and compatibility with harsh environment sensing applications. A number of different sensor-materials exist for the sensing of various chemical and environmental parameters and signal-to-noise ratios (SNRs) for such devices are dictated by a complex interplay of device design and sensing material selection for the EWAS configuration. In this work, we report that one effective way to optimize SNRs for a fixed sensor device / material design is through unique interrogation methods including angular selectivity in the sensor interrogator. We theoretically illustrate the origins of the signal optimization technique, and demonstrate feasibility using an EWAS sensor designed for harsh-environment pH sensing.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
