Abstract
In optical communication systems, the fibre cable plays a vital role in carrying the optical signals from one equipment to another equipment. Active light systems may employ single mode and multimode fibres for the transmission of optical signals. An inherent disadvantage highly noticeable in either case is the underutilization of optical fibre cables in terms of power transmission while coupling with the source. The efficiency of coupling between semiconductor lasers and single mode optical fibres can be greatly increased by a micro lens of an appropriate focal length being fabricated at the front-end of the up tapered fibre. This proposed structure is realised by the simulation work, and it shows the effect of input power coupling efficiency from source to wave guide, measured by optical field propagation. Ordinary fiber, up-tapered fiber and this proposed Microlens integrated up-tapered fiber were taken for our analysis and this proposed work exhibit better coupling efficiency than the previous structures. This work focuses and investigates the feasibility of integrating an optic micro lens, compatible with the size of the up- tapered optic fibre to increase the coupling efficiency.
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