Abstract
In this article, the effect of strain on mode field diameter (MFD) and effective area (Aeff) in a modern multilayer WII type single mode optical fiber is investigated. The modal analysis of the fiber structure is based on linear polarized (LP) approximation method. The simulation results depict that both mode field diameter and effective area grow as a result of increment in tensile strain. The overall effect is observed in a slight rise in quality factor (Qf) of the fiber. Likewise, enlargement in amplitude of compressive strain leads to decrement in MFD and Aeff. However, among the optical and geometrical parameters of the fiber structure, Δ has the most considerable impact on both MFD and Aeff variation whilst R1 shows the least effect. In other words, any shift in the value allocated to Δ results in substantial change in the MFD and Aeff alteration due to strain. To eliminate this effect, the higher amounts for Δ are preferable which is related to the layering structure of the WII type optical fiber.
Highlights
Optical Fibers have revolutionized the telecommunications industry and have played a major role in the advent of the information age
This dimensionless factor determines the trade-off between mode field diameter, which is an indicator of bending loss and effective area, which provides a measure of signal distortion owing to nonlinearity [4]
We present modal analysis based on linearly polarized approximation (LP) for the WII type triple clad single mode optical fiber illustrated in Figure 1 [13]
Summary
Optical Fibers have revolutionized the telecommunications industry and have played a major role in the advent of the information age. The data transmission in different modes contributes to the dispersive nature of optical fiber negatively and results in inter-modal cross talk. This effect limits modulation bandwidth and data transmission capacity of optical fiber link. A suitable optical fiber should hold a small pulse broadening factor (small dispersion and dispersion slope), as well as small nonlinearity (large effective area) and low bending loss (small mode field diameter) for long distance transmission, especially when repeaters cannot be used [3]. The work reported in this article studies the dependence of the MFD and effective area of the WII-type single mode optical fiber on environmental factor of strain.
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