Long-term renewable sol-gel fluorescent optical fiber pH sensor

Oded Ben-David; Ehud Shafir; Irith Gilath; Yehiam Prior; David Avnir

doi:10.1117/12.279156

2 October 1997 Long-term renewable sol-gel fluorescent optical fiber pH sensor

Oded Ben-David, Ehud Shafir, Irith Gilath, Yehiam Prior, David Avnir

Proceedings Volume 3136, Sol-Gel Optics IV; (1997) https://doi.org/10.1117/12.279156
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

The construction and the operation properties of an organically doped, sol-gel cladded optical fiber pH sensor, are described. The silica-entrapped indicator in the fluorescence-based device was fluorescein, pumped with a continuous wave (cw) argon 488 nm laser. The transmitted signal through the sensing fiber yielded a response in the pH range of 4 - 7, where signal level increased from acid to base. The device is durable and renewable. When tested over more than 8 weeks it retained its response, as demonstrated by dozens of cycles of measurements each lasting a few hours. The probe is easily prepared under regular room conditions by simple decladding of the fiber and sol-gel recoating. System design and setup are attractive due to modularity and discardable low cost probe tips.

Citation Download Citation

Oded Ben-David, Ehud Shafir, Irith Gilath, Yehiam Prior, and David Avnir "Long-term renewable sol-gel fluorescent optical fiber pH sensor", Proc. SPIE 3136, Sol-Gel Optics IV, (2 October 1997); https://doi.org/10.1117/12.279156

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