Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Simple interferometer for evanescent field refractive index sensing as a feasibility study for an immunosensor

Not Accessible

Your library or personal account may give you access

Abstract

We describe a fiber optic interferometric refractive index sensor to illustrate that, by using the evanescent field of an optical waveguide, a potentially very sensitive determination of changes in the refractive index on the waveguide surface can be obtained. These changes can, e.g., be the result of immunoreactions. We used a Mach-Zehnder interferometer configuration with a flow-through cuvette in one arm with a decladded multimode glass fiber of 0.6-mm diameter and 2-cm interaction length. The obtained resolution in measuring refractive index changes is 1 × 10−3. We also developed the theory describing the sensitivity of this sensor using the modal and the geometrical ray description.

© 1991 Optical Society of America

Full Article  |  PDF Article
More Like This
Optical waveguide light-mode spectroscopy immunosensors for environmental monitoring

András Székács, Nóra Adányi, Inna Székács, Krisztina Majer-Baranyi, and István Szendrő
Appl. Opt. 48(4) B151-B158 (2009)

Asymmetric Mach–Zehnder interferometers without an interaction window in polymer foils for refractive index sensing

Meike Hofmann, Yanfen Xiao, Stanislav Sherman, Uwe Gleissner, Thomas Schmidt, and Hans Zappe
Appl. Opt. 55(5) 1124-1131 (2016)

Grating interferometer with extremely high stability, suitable for measuring small refractive index changes

Thomas H. Barnes, Kenji Matsumoto, Tomoaki Eiju, Kyofumi Matsuda, and Noatake Ooyama
Appl. Opt. 30(7) 745-751 (1991)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (17)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved