Compact and fast interrogation unit for fiber Bragg grating sensors

Peter Kiesel; Markus Beck; Oliver Schmidt; Noble Johnson; Michael Bassler; Wolfgang Ecke; Kerstin Schroeder; Hartmut Bartelt

doi:10.1117/12.734869

8 October 2007 Compact and fast interrogation unit for fiber Bragg grating sensors

Peter Kiesel, Markus Beck, Oliver Schmidt, Noble Johnson, Michael Bassler, Wolfgang Ecke, Kerstin Schroeder, Hartmut Bartelt

Author Affiliations +

Proceedings Volume 6758, Photonics in the Transportation Industry: Auto to Aerospace; 67580A (2007) https://doi.org/10.1117/12.734869
Event: Optics East, 2007, Boston, MA, United States

Abstract

We present a compact and fast wavelength monitor capable of resolving pm wavelength changes. A photosensor array or position detector element is coated with a linear variable filter, which converts the wavelength information of the incident light into a spatial intensity distribution on the detector. Differential read-out of two adjacent elements of the photosensor array or the position detector is used to determine the centroid of this distribution. A wavelength change of the incident light is detected as a shift of the centroid of the distribution. The performance of this wavelength detector was tested with a wavelength tunable light source. We have demonstrated that our device is capable of detecting wavelength changes as small as ~0.1 pm. The wavelength monitor can be used as read-out unit for any optical sensor that produces a wavelength shift in response to a stimulus. In particular, changes in the reflection properties of one and two-dimensional photonic crystals can been detected. The performance of this interrogation method has been tested for the case of temperature and strain sensors based on Fiber Bragg Gratings (FBG).

Citation Download Citation

Peter Kiesel, Markus Beck, Oliver Schmidt, Noble Johnson, Michael Bassler, Wolfgang Ecke, Kerstin Schroeder, and Hartmut Bartelt "Compact and fast interrogation unit for fiber Bragg grating sensors", Proc. SPIE 6758, Photonics in the Transportation Industry: Auto to Aerospace, 67580A (8 October 2007); https://doi.org/10.1117/12.734869

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