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Design and Analysis of Single Mode Photonic Crystal Fibers with Zero Dispersion and Ultra Low Loss

Kumar P., Tripathy A., Roy J. S.

International Journal of Electronics and Telecommunications

2018

Vol. 64, No. 4

541--546

PCFs (Photonic Crystal Fibers) with ‘T’ – shaped core have been proposed in this paper. ‘T’ –shaped core PCF structures have been analyzed using two different background materials: silica and lead silicate. A total of 360° rotation at an interval of 90° has been introduced in the design of PCF structures. PCF structures A, B, C and D with rotation of 0°, 90°, 180° and 270° have silica as wafer. Similarly PCF structures E, F, G and H with similar rotation have lead silicate as background material. Numerical investigations shows structures ‘D’, ‘F’, ‘G’ and ‘H’ to have anomalous dispersion. PCF structures ‘F’, ‘G’, and ‘H’ have reported birefringence of the order of 10⁻². Besides, other PCF structures report birefringence of the order of 10⁻³. Ultra low confinement loss has been observed in all the investigated PCF structures. Moreover, splice loss observed by the structure is very low. Large mode area has been shown by all the designed PCF structures.

Process optimisation of the arc fusion splicing different types of single mode telecommunications fibres

Ratuszek M., Zakrzewski Z., Majewski J., Ratuszek M. J.

Opto-Electronics Review

2000

Vol. 8, No. 2

161-170

Calculation method and coefficient values of the GeO₂ dopant diffusion from the core to the cladding of spliced fibres in splicing temperature have been presented. Accepting different diffusion models, the intermediate area dimensions for various splicing parameters were calculated. A correlation between intermediate area parameters and splice loss of single mode fibres of different types including those designed for WDM has been discovered. The analysis and usage of one-way OTDR measurement of splice losses of fibres with essential differences in cores diameters and numerical aperture has been presented. There also has been presented the influence of these parameters on one-way OTDR measurement of loss of splices of joined fibres.