Borosilicate Based Hollow-Core Optical Fibers

Abstract

We discuss the fabrication of hollow-core optical fibers made of borosilicate glass. We show that, despite the high attenuation of the glass relative to silica, the fiber optical losses can be of the same order of magnitude of those obtained by using ultrapure silica glass. Short lengths of the fabricated fibers, used in combination with incoherent optical sources, provide single-mode optical guidance in both near and mid-infrared spectral ranges without any additional optical components.

Numerical Modeling of a Rectangular Hollow-Core Waveguide for the Detection of Fuel Adulteration in Terahertz Region

“…Im n e f f dB/cm (5) where, the operating terahertz signal frequency is expressed by f, Im(neff ) stands for the imaginary part of the effective refractive index and c is the velocity of light in free space. The confinement loss of the proposed fiber as a function of the frequency is shown in Figure 10.…”

“…Since its introduction in 1996, photonic crystal fiber (PCFs) has opened new alternatives to improve photonic devices for sensing and telecommunications applications [1]. This kind of optical fiber offers many degrees of freedom in its design to achieve a variety of peculiar optical properties, such as endlessly single-mode operation, larger effective core area, high nonlinearity, design flexibility, and low losses [2][3][4][5]. These unique characteristics have led to the creation of new devices for solving traditional problems in telecommunications, such as attenuation and dispersion [3,6,7].…”

Glass: The carrier of light—Part II—A brief look into the future of optical fiber

“…Hollow core optical fibers have been made from a range of materials including soft 44 and infrared (IR) glasses. [45][46][47][48][49] However, for reasons discussed immediately below, they have dominantly been made from pure silica.…”

Laser-Based Trace Gas Detection inside Hollow-Core Fibers: A Review

“…Transmission at even longer wavelengths has been obtained using other glass types. NC HCFs made of various materials have been demonstrated, including borosilicate [77], tellurite [78], and chalcogenide [79][80][81] glass. In [82], a 1.15-m-long borosilicate NC HCF with a core dimeter of more than 100 µm was used for gas sensing near 5.26 µm.…”