The present paper is concerned with improving the sensing performance of optical fiber Bragg gratings (FBG) by the deposition of periodic metallic thin films around optical fibers to make superstructure FBGs (SFBG). Laser-Assisted Maskless Microdeposition (LAMM), which is an additive laser microdeposition method, is used to selectively deposit on-fiber thin films from silver nanoparticles. The LAMM process characterization, including the microstructure and mechanical properties of on-fiber thin films, are also presented. In addition, as the laser radiation is a major part of the process, the effects of parameters related to the laser treatment of samples are studied. To design the thin films, an optomechanical model of SFBG sensors with on-fiber thin films is developed. The sensitivity analysis and the capabilities of the sensor for multi-parameter sensing are also investigated.
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