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Dispersion-shifted dual-shape core fibers. Optimization based on spot size definitions

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3 Author(s)
Tewari, R. ; Dept. of Phys., Indian Inst. of Technol., New Delhi, India ; Pal, B.P. ; Das, U.K.

Design features, for very low bend and splice losses, in dispersion-shifted dual-shape core (DSC) single-mode fibers are obtained in terms of characteristic mode spot sizes W¯ responsible for splice loss, and W responsible for bend loss. Dual-shape core fiber designs are given with W¯/W lying between 1.16 and 1.33 while maintaining the mode spot size between 4 and 5 μm at the operating wavelength of 1550 nm. With this design goal it is shown that bending loss would be lower in a step-index than in a graded-index DSC fiber. Further, conventional single clad step-index or triangular-index dispersion-shifted fibers are seen to have higher bending loss than well-designed DSC fibers

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Lightwave Technology, Journal of  (Volume:10 ,  Issue: 1 )