UV-Writing of a Superstructure Waveguide Bragg Grating in a Planar Polymer Substrate

We report on the fabrication of a superstructure Bragg grating in a planar polymer substrate. Based on a twofold illumination process an integrated waveguide and a superstructure Bragg grating are subsequently written into bulk polymethylmethacrylate by UV-induced refractive index modification. The measured reflected spectrum of the superstructure Bragg grating exhibits multiple reflection peaks and is in good agreement with performed standard simulations based on the beam propagation method and coupled mode theory algorithms. By applying a varying tensile load we determine the strain sensitivity to be about 1.10 pm/µε and demonstrate the applicability of the superstructure Bragg grating for strain measurements with redundant sensing signals.

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

[2]  John P. Dakin,et al.  Discrimination between strain and temperature effects using dual-wavelength fibre grating sensors , 1994 .

[3]  Jose L. Cruz,et al.  A dual-wavelength tunable laser with superimposed fiber Bragg gratings , 2013 .

[4]  Christos Riziotis,et al.  Planar Bragg Grating Sensors - Fabrication and Applications: A Review , 2009, J. Sensors.

[5]  Influence of chemical polymer composition on integrated waveguide formation induced by excimer laser surface irradiation , 2015 .

[6]  Ralf Hellmann,et al.  Simultaneous 2D Strain Sensing Using Polymer Planar Bragg Gratings , 2015, Sensors.

[7]  C. Wochnowski.  UV-laser-based fabrication of a planar, polymeric Bragg-structure , 2009 .

[8]  Low cost polymer sampled waveguide Bragg grating fabricated by using contact lithography , 2015 .

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

[10]  30 dB sampled gratings in germanosilicate planar waveguides , 1996 .

[11]  A. Ikiades,et al.  Fabrication of high-reflectivity superimposed multiple-fiber Bragg gratings with unequal wavelength spacing. , 2002, Optics letters.

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

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

[14]  M. Kristensen,et al.  Strong sampled Bragg gratings for WDM applications , 1998, IEEE Photonics Technology Letters.

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

[16]  Ralf Hellmann,et al.  Polymer planar Bragg grating for sensing applications , 2013, Europe Optics + Optoelectronics.

[17]  Gang-Ding Peng,et al.  Optical fibre temperature and humidity sensor , 2010 .

[18]  B. Eggleton,et al.  Long periodic superstructure Bragg gratings in optical fibres , 1994 .

[19]  R. Measures,et al.  Superimposed multiple Bragg gratings , 1994 .

[20]  L. Reinhart,et al.  Tuning Bragg wavelength by writing gratings on prestrained fibers , 1994, IEEE Photonics Technology Letters.

[21]  Norbert Keil,et al.  Thermally Tunable Silicon Nitride Sampled Gratings in Polymer , 2013, IEEE Photonics Technology Letters.