Displacement sensor based on a large-core hollow fiber and specklegram analysis

The research enterprise towards achieving high-performance hollow-core photonic crystal fibers has led to impressive advancements in the latest years. Indeed, using this family of becomes nowadays an overarching strategy for building a multitude optical systems ranging from beam delivery devices sources and sensors. In most applications, effective single-mode operation is desired and, as such, fiber microstructure or light launching setups are typically designed such behavior. Alternatively, one can identify use large-core multimode promising avenue development new devices. Thus, manuscript, we propose demonstrate utilization tubular-lattice accomplishing speckle-based displacement sensor, which been built up by inserting suitably dislocating inside void core hollow fiber. work reported herein encompasses both simulation experimental studies on evolution intensity distributions within device well demonstration sensor with estimated resolution 0.7 μm. We understand that investigation identifies opportunity employment sensing framework hence widening gamut applications fibers.