Distributed fiber optic chemical sensor for hydrogen sulfide and chlorine detection

Harold Mukamal; Steven R. Cordero; David Ruiz; Manal Beshay; Robert A. Lieberman

doi:10.1117/12.630959

10 November 2005 Distributed fiber optic chemical sensor for hydrogen sulfide and chlorine detection

Harold Mukamal, Steven R. Cordero, David Ruiz, Manal Beshay, Robert A. Lieberman

Proceedings Volume 6004, Fiber Optic Sensor Technology and Applications IV; 600406 (2005) https://doi.org/10.1117/12.630959
Event: Optics East 2005, 2005, Boston, MA, United States

Abstract

Fiber optic sensors having their entire length as the sensing elements for chlorine or hydrogen sulfide are reported here. The chlorine fiber consists of a silica core and a chlorine-sensitive cladding, and the hydrogen sulfide fiber has a hydrogen sulfide sensitive cladding. Upon exposure to the corresponding challenge gas, the cladding very rapidly changes color resulting in attenuation of the light throughput of the fiber. A one-meter portion of the chlorine sensor fiber responds to 10 ppm chlorine in 20 seconds and to 1 ppm in several minutes. The attenuation after 10 minutes of exposure is very high, and is dependant on both chlorine concentration and fiber length. A ten-meter portion of the hydrogen sulfide sensor fiber responds to 100 ppm hydrogen sulfide in 30 seconds and to 10 ppm in 1 minute. The high sensitivity suggests that the propagating modes of the light interact strongly with the cladding, and that these interactions are massively increased (Beers Law) due to the extended sensor length. This approach will supersede the current method of having a collection of point-detectors to cover large areas.

Citation Download Citation

Harold Mukamal, Steven R. Cordero, David Ruiz, Manal Beshay, and Robert A. Lieberman "Distributed fiber optic chemical sensor for hydrogen sulfide and chlorine detection", Proc. SPIE 6004, Fiber Optic Sensor Technology and Applications IV, 600406 (10 November 2005); https://doi.org/10.1117/12.630959

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