Waveguide Bragg grating prepared by direct laser writing technology

In this paper we propose a method for miniaturization of filters based on waveguide Bragg gratings (BG). Polymer based device was prepared using direct laser writing (DLW) lithography. DLW technology combine principles of two photon polymerization and 3D printing, it is suitable for application in microoptics and in optical sensing. The proposed design allows packed 1.5 mm length waveguide with Bragg grating on a chip into a circle area with diameter of 200 μm.