For many years, an optical fiber has been an essential ingredient in variety of devices in science and technology. Optical fiber is the central piece of high-speed data communication systems. They are crucial components in lasers generating high-power light pulses used in steel production industry, modern military equipment, remote sensing devices, biology and medicine. Presently, the cutting edge fiber technology is specialty fibers that guide light in non-traditional ways. Hollow-core fibers are among them. I will review the existing progress and present my own achievements in this area.

My presentation will focus on the specialty hollow-core fibers of novel designs. A few geometries will be considered. I investigated their linear properties using finite-element method [1]. On the other hand, filling the hollow core with gas provides necessary nonlinearity which suggests their use as new light sources in mid-infrared spectral band [2]. The possibility to easily tune the optical properties by changing the filling material inside the hollow-core fiber is a significant advantage that brings a large degree of freedom in nonlinear applications. It leads to the development of optical sources with unique and exceptional properties [2].

References

1. M. I. Hasan, N. Akhmediev and W. Chang, Positive and negative curvatures nested in an antiresonant hollow-core fiber, Optics Letters, 42, No. 4, 703 - 706 (2017).

2. M. I. Hasan, N. Akhmediev and W. Chang, Mid-infrared supercontinuum generation in supercritical xenon-filled hollow-core negative curvature fibers, Optics Letters, 41, No. 21, 5122 (2016).