Angular interrogation of evanescent wave absorption spectroscopy based sensors for harsh environment applications

M. P. Buric; P. Ohodnicki Jr.; Z. Poole; C. Wang; J. Elwood

doi:10.1117/12.2188941

26 August 2015 Angular interrogation of evanescent wave absorption spectroscopy based sensors for harsh environment applications

M. P. Buric, P. Ohodnicki Jr., Z. Poole, C. Wang, J. Elwood

Author Affiliations +

Proceedings Volume 9586, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications IX; 95860Q (2015) https://doi.org/10.1117/12.2188941
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

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.

Citation Download Citation

M. P. Buric, P. Ohodnicki Jr., Z. Poole, C. Wang, and J. Elwood "Angular interrogation of evanescent wave absorption spectroscopy based sensors for harsh environment applications", Proc. SPIE 9586, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications IX, 95860Q (26 August 2015); https://doi.org/10.1117/12.2188941

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available