Hybrid porous‐core microstructure terahertz fibre with ultra‐low bending loss and low effective material loss

Ultra low loss and dispersion flattened microstructure fiber for terahertz applications

“…This happens because the refractive index difference between core and cladding is increased by the decrease of core porosity which helps to confine the light better in core region. It is beneficial to note that at f= 1 THz and 40% porosity, a structure with Lcore= 390 µm offers a confinement loss of 6.3×10 -3 cm -1 which is comparable with the previous works in [14][15][16][17][18][19]. Fig.…”

“…From Figure 3 and Figure 4 we can say that, the obtained EML at 50% core porosity is better than the ones previously reported in Ref. [14][15][16][17][18][19]. In case of all types of optical waveguide, there exist another kind of loss and it is called confinement loss.…”

“…8. From that graphical representation we can see that, the effective area is in the order of 1.79×10 -7 m 2 for Lcore=390 µm and 50% porosity which is better than reported works in literature [14][15][16][17][18][19]. Now, V parameter is analysed for the proposed rectangular core PCF to ensure single mode fashion guidance.…”

“…The simulation results showed that a very low EML of 0.043 cm -1 at 1 THz and ultra-flattened dispersion of 0.09 ps/THz/cm from 1-1.3 THz can be achieved at optimum condition. After that, in the year 2017, Hasan et al reported a hybrid core microstructure fiber [15] which offered low bending loss of 5.24 ×10 −13 cm −1 at 1 THz and low dispersion of 0.33 ps/ THz/ cm over a wide frequency ranging from 0.9 to 1.6 THz. Nevertheless, the EML is 0.08 cm -1 at 1 THz which is slightly higher and will restrict the long distance communication.…”

Design and Electromagnetic Analysis of Microstructured Holey Optical Fibres with Stepwise Random-Air-Hole Distributions in Concentric Cladding Layers

“…Because of its unique structure, which is different from those of the conventional step-index or graded-index fibres, the PCF or MHOF can provide propagation properties not easily attainable from conventional fibres [11][12][13][14]. For example, the MHOF can be designed to be single-mode over the entire wavelength range of interest in optical communications, provide small and nearly constant dispersion over a wide wavelength range, or be a highly nonlinear optical fibre [9,11].…”