Abstract
It has been recently a tremendous interest from the scientific community in hollow-core fibers because they can be used in applications, such as gas, liquid and chemical sensing [1] and gas-based nonlinear optics [2]. The confinement of light in a hollow-core fiber can be categorized into three main guidance mechanisms based on the structure of the fiber which is photonic bandgap mechanism, “inhibited coupling” mechanism (for example Kagome fiber) and a simplified version of the two latter, where the light is confined in the core of the fiber via anti-resonant reflecting optical waveguide (ARROW) [3]. Although ARROW guidance has primarily been associated with hollow-core fibers, it has also been reported in solid-core PCFs, in both polymer and silica, where the cladding holes have been filled with high-index materials or high-index films [4]. Silica hollow-core antiresonant fibers have attracted significant attention recently because they can transmit light in the mid-IR transmission range with low loss. However, limited research has been done in polymer hollow-core ARROW fibers [5]. Polymer fibers are considered ideal candidates for sensing applications, such as temperature and strain sensing and fiber-optical biosensing due to their high thermo-optic coefficient, low Young’s modulus, and biocompatibility properties.
© 2015 IEEE
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