Influence of a thin metal layer on a beam propagation in a biconical optical fibre taper

Abstract

The paper presents results of a simulation of the plasmon effect achieved between a thin precious metal layer and a biconical optical fibre taper, manufactured on a standard single mode fibre. Gold, silver and titanium were used as a metal which fulfilled a cladding function for a small diameter structure. For simulation Mode Solution software was used on which modal and frequency analyses of a wavelength were provided in the range of 800–1700 nm. A displacement of a plasmon pick in dependence of thickness of a deposited precious layer for the highest plasmon effects was observed.

Modification of Higher Alkanes by Nanoparticles to Control Light Propagation in Tapered Fibers

“…A detailed description of the manufacturing process are included in the previous articles, hence, it will not be presented in this paper [ 11 , 34 ]. Prepared tapers used for presented threshold sensors are characterized by low losses below α = 0.2 dB in a whole investigated range, elongation L = 20.20 ± 0.05 mm and diameter of the taper waist φ = 14.50 ± 0.50 μm.…”

“…For the manufacturing of the biconical optical fiber tapers, the author's arrangements named FOTET II (Fiber Optic Taper Element Technology) were used [34], as presented in Figure 4. A detailed description of the manufacturing process are included in the previous articles, hence, it will not be presented in this paper [11,34]. Prepared tapers used for presented threshold sensors are characterized by low losses below α = 0.2 dB in a whole investigated range, elongation L = 20.20 ± 0.05 mm and diameter of the taper waist φ = 14.50 ± 0.50 µm.…”

“…Theoretical and experimental investigation of changing core and cladding diameters, optical beam parameters, as well as a refractive index profile along with the fiber show that with the reduction of the diameter/dimensions of the core and the clading, the diameter of the propagating beam increases, filling the entire taper structure and extending beyond it [ 11 ].…”

“…For both kinds of fibers, a technique known as tapering can be applied for changing the core and cladding diameters [ 6 , 7 , 8 , 9 , 10 , 11 ]. Tapering technology uses a relatively easy technique to fill the air holes and provides the possibility of the continuous monitoring of changes of the light propagation through the fiber during element manufacturing, i.e., a diameter of taper region control.…”

Detection of Organosulfur and Organophosphorus Compounds Using a Hexafluorobutyl Acrylate-Coated Tapered Optical Fibers

“…The aforementioned parameters enable sensors based on optical fibers to detect and measure such factors as, e.g., surrounding refractive index, temperature, pressure, mechanical strain, stress or vibrations and even chemical reagents [ 3 , 4 , 5 ]. To enhance the sensing possibilities of optical fibers, it is possible to combine them with additional functional materials, such as liquid crystals [ 6 ], alkanes [ 7 , 8 ], polymers [ 9 ], metals [ 10 , 11 ] or graphene compounds [ 12 ]. The most common methods of applying these functional materials to optical fibers is by forming an external coating after polishing the fiber [ 13 ] or fabricating a taper [ 14 , 15 , 16 ], or by filling the internal air holes in a photonic crystal fiber [ 17 ].…”