Recent Advancement of Anti-Resonant Hollow-Core Fibers for Sensing Applications

Abstract

Specialty fibers have enabled a wide range of sensing applications. Particularly, with the recent advancement of anti-resonant effects, specialty fibers with hollow structures offer a unique sensing platform to achieve highly accurate and ultra-compact fiber optic sensors with large measurement ranges. This review presents an overview of recent progress in anti-resonant hollow-core fibers for sensing applications. Both regular and irregular-shaped fibers and their performance in various sensing scenarios are summarized. Finally, the challenges and possible solutions are briefly presented with some perspectives toward the future development of anti-resonant hollow-core fibers for advanced sensing.

Full-Vectorial Fiber Mode Solver Based on a Discrete Hankel Transform

“…However, some waveguide concepts will remain to be not addressable with the presented approach, in particular, if it is a priori known that evanescent fields do not comply with the DHT-related requirement regarding being (effectively) space-limited as for example for leaky modes in (Bragg-type, anti-resonant, etc.) hollow-core waveguides [33,34]. Institutional Review Board Statement: Not applicable.…”

Double Antiresonance Fiber Sensor for the Simultaneous Measurement of Curvature and Temperature

“…The unique capability that PCFs have on manipulating some of the optical properties, such as birefringence, nonlinearities, and dispersion [ 1 , 2 , 3 ], have made them an exquisite topic of interest in the scientific community. Among the category of the PCFs, hollow core PCFs (HC-PCFs) can be highlighted, which have attracted great interest due to their aptitude on guiding light with relatively low-loss [ 2 , 4 ]. The recent breakthrough of the antiresonant hollow core fiber (ARHCF), a new category of HC-PCF, allowed not only to overcome several difficulties in the telecommunication area, but also to fully exploit the resonance behavior in new sensing applications, specifically in the optofluidics area [ 4 , 5 , 6 ] and in the biomedical and biochemical fields [ 4 , 7 , 8 ].…”

“…Among the category of the PCFs, hollow core PCFs (HC-PCFs) can be highlighted, which have attracted great interest due to their aptitude on guiding light with relatively low-loss [ 2 , 4 ]. The recent breakthrough of the antiresonant hollow core fiber (ARHCF), a new category of HC-PCF, allowed not only to overcome several difficulties in the telecommunication area, but also to fully exploit the resonance behavior in new sensing applications, specifically in the optofluidics area [ 4 , 5 , 6 ] and in the biomedical and biochemical fields [ 4 , 7 , 8 ]. The ARHCF, whose light guidance relies on the principle of antiresonant reflecting optical waveguide (ARROW) [ 9 , 10 ], has been subject of scrutiny due to the numerous advantages it holds, such as ultralow loss and dispersion [ 4 , 11 , 12 , 13 , 14 ], reduced nonlinearities [ 13 , 15 ], ultrashort pulse delivery [ 13 , 16 , 17 , 18 ], and a broad bandwidth [ 11 , 12 , 19 ].…”

Angle-Resolved Hollow-Core Fiber-Based Curvature Sensing Approach

“…Among the application opportunities, which encompass, for example, the development of novel optical sources and atom optics experiments [8][9][10], the field of optical sensors acquires a prominent position within HCPCF technology due to the broad set of parameters that can be potentially monitored [11]. HCPCFs have been demonstrated, for example, to be a promising platform for probing concentrations of chemical species in gaseous and liquid samples [12][13][14][15][16][17][18].…”