Sensing of multiple parameters with whispering gallery mode optical fiber micro-resonators

Arun Kumar Mallik; Vishnu Kavungal; Gerald Farrell; Yuliya Semenova

doi:10.1117/12.2513412

4 March 2019 Sensing of multiple parameters with whispering gallery mode optical fiber micro-resonators

Arun Kumar Mallik, Vishnu Kavungal, Gerald Farrell, Yuliya Semenova

Proceedings Volume 10904, Laser Resonators, Microresonators, and Beam Control XXI; 109041W (2019) https://doi.org/10.1117/12.2513412
Event: SPIE LASE, 2019, San Francisco, California, United States

Abstract

Monitoring of multiple physical parameters, such as humidity, temperature, strain, concentrations of certain chemicals or gases in various environments is of great importance in many industrial applications both for minimizing adverse effects on human health as well as for maintaining production levels and quality of products. In this paper we demonstrate two different approaches to the design of multi-parametric sensors using coupled whispering gallery mode (WGM) optical fiber micro-resonators. In the first approach, a small array of micro-resonators is coupled to a single fiber taper, while in the second approach each of the micro-resonators within an array is coupled to a different tapered fiber section fabricated along the same fiber length. Simultaneous measurement of relative humidity and ammonia concentration in air is demonstrated with an array of two microspheres with different functional coatings coupled to a single fiber taper. Sensitivity to ammonia of 19.07 pm/ppm ammonia molecules and sensitivity to relative humidity of 1.07 pm/% RH have been demonstrated experimentally. In the second approach, an inline cascade of two cylindrical micro-resonators fabricated by coupling to multiple tapered sections along a single optical fiber is demonstrated for measurement of strain and temperature simultaneously. A strain sensitivity of 1.4 pm/με and temperature sensitivity of 330 pm/ºC have been demonstrated experimentally. Both the proposed sensing systems have the potential for increase of the number of microresonators within an array for sensing of a larger number of parameters allowing for reduction of the overall cost of sensing system.

Citation Download Citation

Arun Kumar Mallik, Vishnu Kavungal, Gerald Farrell, and Yuliya Semenova "Sensing of multiple parameters with whispering gallery mode optical fiber micro-resonators", Proc. SPIE 10904, Laser Resonators, Microresonators, and Beam Control XXI, 109041W (4 March 2019); https://doi.org/10.1117/12.2513412

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