Wavelength coded fiber optic sensors for verification of identity

Charles K. Gary; Josh Rubin

doi:10.1117/12.255371

25 October 1996 Wavelength-coded fiber optic sensors for verification of identity

Charles K. Gary, Josh Rubin

Proceedings Volume 2839, Fiber Optic and Laser Sensors XIV; (1996) https://doi.org/10.1117/12.255371
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

In this paper we present a fiber-optic sensing system designed to verify the identity of objects or personnel. The spectrum of a fiber-optic Bragg grating can store information, which can then be accessed simply by examining the reflection spectrum of the grating. Typically, fiber- optic Bragg grating sensors measure perturbations in the spectrum of the grating caused by the environment. However, spectral information can also distinguish various Bragg gratings, a principle that is used to wavelength division multiplex limited numbers of Bragg gratings sensors. Going one step further, a very large number of gratings can be distinguished by their spectra. In this paper, we present the experimental validation of a system capable of distinguishing over 1000 sensor heads. The fiber-optic Bragg gratings can be thought of as keys, or ID cards, that can be read by a detector to limit access to secure information or places. The system can readily expand to provide the capability of distinguishing over a million keys. In addition, the keys can also function as sensors.

Citation Download Citation

Charles K. Gary and Josh Rubin "Wavelength-coded fiber optic sensors for verification of identity", Proc. SPIE 2839, Fiber Optic and Laser Sensors XIV, (25 October 1996); https://doi.org/10.1117/12.255371

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