Simultaneous 2D Strain Sensing Using Polymer Planar Bragg Gratings

We demonstrate the application of polymer planar Bragg gratings for multi-axial strain sensing and particularly highlight simultaneous 2D strain measurement. A polymer planar Bragg grating (PPBG) fabricated with a single writing step in bulk polymethylmethacrylate is used for measuring both tensile and compressive strain at various angles. It is shown that the sensitivity of the PPBG strongly depends on the angle between the optical waveguide into which the grating is inscribed and the direction along which the mechanical load is applied. Additionally, a 2D PPBG fabricated by writing two Bragg gratings angularly displaced from each other into a single polymer platelet is bonded to a stainless steel plate. The two reflected wavelengths exhibit different sensitivities while tested toward tensile and compressive strain. These characteristics make 2D PPBG suitable for measuring multi-axial tensile and compressive strain.

[1]  Guang Feng Wang,et al.  Inscription of Polymer Optical Fiber Bragg Grating at 962 nm and Its Potential in Strain Sensing , 2010, IEEE Photonics Technology Letters.

[2]  D. Webb,et al.  Humidity insensitive TOPAS polymer fiber Bragg grating sensor. , 2011, Optics express.

[3]  W. Urbańczyk,et al.  Fabrication of multiple Bragg gratings in microstructured polymer fibers using a phase mask with several diffraction orders. , 2013, Optics express.

[4]  K. Hill,et al.  Fiber Bragg grating technology fundamentals and overview , 1997 .

[5]  Michael A. Davis,et al.  Fiber grating sensors , 1997 .

[6]  Christos Markos,et al.  Bragg grating writing in PMMA microstructured polymer optical fibers in less than 7 minutes. , 2014, Optics express.

[7]  S. Waldvogel,et al.  Allylated cyclodextrins as effective affinity materials in chemical sensing of volatile aromatic hydrocarbons using an optical planar Bragg grating sensor. , 2013, Analytica chimica acta.

[8]  Wei Zhang,et al.  Polymer optical fiber Bragg grating acting as an intrinsic biochemical concentration sensor. , 2012, Optics letters.

[9]  B Schmauss,et al.  Planar Bragg grating in bulk polymethylmethacrylate. , 2012, Optics express.

[10]  Philip Smith,et al.  n investigation into relative humidity measurement using an luminosilicate sol – gel thin film as the active layer in an integrated ptical Bragg grating refractometer , 2013 .

[11]  Gang-Ding Peng,et al.  High Sensitivity Force and Pressure Measurements Using Etched Singlemode Polymer Fiber Bragg Gratings , 2013, IEEE Sensors Journal.

[12]  K. Hill,et al.  Photosensitivity in optical fiber waveguides: Application to reflection filter fabrication , 1978 .

[13]  D. J. Webb,et al.  Investigation Into Time Response of Polymer Fiber Bragg Grating Based Humidity Sensors , 2012, Journal of Lightwave Technology.

[14]  Christos Markos,et al.  High-Tg TOPAS microstructured polymer optical fiber for fiber Bragg grating strain sensing at 110 degrees. , 2013, Optics express.

[15]  Larry R. Dalton,et al.  Polymer-based optical waveguides: Materials, processing, and devices , 2002 .

[16]  Alessio Stefani,et al.  Dynamic Characterization of Polymer Optical Fibers , 2012, IEEE Sensors Journal.

[17]  Morten Ibsen,et al.  Fabrication of directly UV-written channel waveguides with simultaneously defined integral Bragg gratings , 2002 .

[18]  Bjarke Rose,et al.  Improved thermal and strain performance of annealed polymer optical fiber Bragg gratings , 2011 .

[19]  Bernhard Schmauss,et al.  Fabrication and characterization of planar Bragg gratings in TOPAS polymer substrates , 2015 .

[20]  B Schmauss,et al.  Compressive and tensile strain sensing using a polymer planar Bragg grating. , 2014, Optics express.

[21]  B Schmauss,et al.  Polymer planar Bragg grating sensor for static strain measurements. , 2013, Optics letters.

[22]  Ivan P. Kaminow,et al.  PHOTOINDUCED REFRACTIVE INDEX INCREASE IN POLY(METHYLMETHACRYLATE) AND ITS APPLICATIONS , 1970 .

[23]  David J Webb,et al.  Influence of mounting on the hysteresis of polymer fiber Bragg grating strain sensors. , 2013, Optics letters.

[24]  A. Stefani,et al.  High Sensitivity Polymer Optical Fiber-Bragg-Grating-Based Accelerometer , 2012, IEEE Photonics Technology Letters.

[25]  R. Kashyap.  Fiber Bragg Gratings , 1999 .