Stabilization for intensity-based sensors using two-wavelength ratio technique

George Z. Wang; Anbo Wang; Russell G. May; Adam E. Barnes; Kent A. Murphy; Richard O. Claus

doi:10.1117/12.229246

3 January 1996 Stabilization for intensity-based sensors using two-wavelength ratio technique

George Z. Wang, Anbo Wang, Russell G. May, Adam E. Barnes, Kent A. Murphy, Richard O. Claus

Proceedings Volume 2594, Self-Calibrated Intelligent Optical Sensors and Systems; (1996) https://doi.org/10.1117/12.229246
Event: Photonics East '95, 1995, Philadelphia, PA, United States

Abstract

Intensity-based fiber optic sensors are referred to those sensors whose outputs are modulated by intensity levels and not optical phase variations. The attractive features of intensity-based sensors over interferometric sensors include simple in structure, absolute measurement and long-term stability in performance. One important issue for intensity-based fiber sensors is stabilization schemes used to compensate for unwanted disturbances in sensing systems. Two- wavelength ratio (TWR) method is one of the most commonly used compensation technique. In this paper, we study the TWR method in great details by discussing four novel intensity- based sensors developed in our research group. These fiber sensors are: (1) High temperature sensor based on the total internal reflection with temperature measurement up to 1000 degree(s)C; (2) Temperature sensor and distributed sensing system using dielectric filters, achieving temperature measurement of more than 100 degree(s)C and a resolution of 0.5 degree(s)C; (3) Displacement sensor using diffraction grating reflector with a dynamic range of 150 micrometers and 2 micrometers resolution; (4) Displacement sensor using GRIN lens having a displacement range up to 20 micrometers with sub-micrometers resolution. Issues related to the signal transmission in sensing systems are also addressed.

Citation Download Citation

George Z. Wang, Anbo Wang, Russell G. May, Adam E. Barnes, Kent A. Murphy, and Richard O. Claus "Stabilization for intensity-based sensors using two-wavelength ratio technique", Proc. SPIE 2594, Self-Calibrated Intelligent Optical Sensors and Systems, (3 January 1996); https://doi.org/10.1117/12.229246

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