A porous anodic alumina film is proposed to construct an optical fiber temperature and humidity sensor. Renato Faraco Filho, João Gabriel de Carvalho, Luiz David Silva, Enzo Dantas da Silva, Sinei Gonçalves Júnior, Flávio Augusto Marques, Alexandre Cotta, Alexandre Bessa dos Santos, Jonas Henrique Osório and Jefferson E. Optical fiber humidity sensors (OFHSs) offer several advantages over electronic humidity sensors such as miniature design, durability, the possibility of working on flammable environments and at higher temperature and pressure ranges, and, most important, their electromagnetic immunity. The proposed porous anodic alumina. Fiber optic temperature sensors are immune to the many environmental effects that compromise other measurement technologies, can be embedded and installed in locations traditional temperature sensors cannot and deliver an unprecedented level of spatial detail and data without sacrificing precision. We demonstrate an all-fiber, high-sensitivity, dual-parameter sensor for humidity and temperature.
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