Optical fiber sensor for the measurement of the pH level using organic dyes deposited by the sol-gel process

Juan Pablo Padilla Martínez; Imelda Santiago Núñez; Georgina Beltrán Pérez; Juan Castillo Mixcóatl; Severino Muñoz Aguirre; Rodolfo Palomino Merino

doi:10.1117/12.742279

19 May 2007 Optical fiber sensor for the measurement of the pH level using organic dyes deposited by the sol-gel process

Juan Pablo Padilla Martínez, Imelda Santiago Núñez, Georgina Beltrán Pérez, Juan Castillo Mixcóatl, Severino Muñoz Aguirre, Rodolfo Palomino Merino

Author Affiliations +

Proceedings Volume 6422, Sixth Symposium Optics in Industry; 64220Z (2007) https://doi.org/10.1117/12.742279
Event: Sixth Symposium Optics in Industry, 2007, Monterrey, Mexico

Abstract

Some pH sensors based on optical fibers use organic dyes which are sensitive to the pH levels. Such dyes are deposited over the fiber and they are supported by a matrix, (TiO₂) in this case. In this work, we present the results obtained of the fabrication and characterization of an optical fibers sensor with a thin film doped with two different organics dyes (Rhodamine 6G and Coumarin), deposited in a little section of the optical fiber by the SOL - GEL process. It was found that each dye is sensitive to different pH ranges (2 to 12). The fiber optics sensor can be used for the measured of the pH level of aqueous testing solution, and the combination of the dyes is possible to cover a dynamic ranges from 2 to 12. It is also analyzed the sensitivity of the sensor with the Rhodamine 6G and Coumarin dye for different molar concentrations in a range 0.01% to 0.08% and to determine this way the best concentration for the sensor.

Citation Download Citation

Juan Pablo Padilla Martínez, Imelda Santiago Núñez, Georgina Beltrán Pérez, Juan Castillo Mixcóatl, Severino Muñoz Aguirre, and Rodolfo Palomino Merino "Optical fiber sensor for the measurement of the pH level using organic dyes deposited by the sol-gel process", Proc. SPIE 6422, Sixth Symposium Optics in Industry, 64220Z (19 May 2007); https://doi.org/10.1117/12.742279

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Sensors

Optical fibers

Fiber optics sensors

Rhodamine

Thin films

Sol-gels

Carbon monoxide

Show All Keywords

Keywords/Phrases

Search In:

Publication Years