Abstract
We present new type of silica graded index laser-optimized multimode optical fibers (LOMF) with extremely enlarged core diameter up to 100 μm and “typical” “telecommunication” cladding diameter 125 μm. This optical fiber was designed for harsh environment Gigabit onboard cable systems and industrial networks. It differs by special optimized graded refractive index profile, providing low differential mode delay (DMD) for selected guided modes. We present some results of tests, performed for manufactured pilot 520 m length of described LOMF 100/125, concerned with its geometry properties as well as key transmission parameters—attenuation and DMD map.
Highlights
At the present time, high bit rate networks are based on single-mode optical fibers.Nowadays, laser-excited optical signal transmission technique over large core silica optical fibers is widely applied in various applications
We demonstrate some results of tests, performed for manufactured pilot 520 m length of described laser-optimized multimode optical fibers (LOMF) 100/125, concerned with its geometry properties as well as key transmission parameters—attenuation and differential mode delay (DMD) map
J=1 where td(j) is desired value of delay for j-th guided mode LPlm(j) been computed at corresponding optimization step; tREF is some reference value of mode delay, which is utilized for DMD diagram equalization; M is the total number of selected guided modes transferring laser-excited optical signal with normalized amplitude not less than Aj > 0.1 and core power not less than Pco ≥ 0.5
Summary
High bit rate networks are based on single-mode optical fibers. Onboard and industrial cable systems operate in harsh environmental conditions: high-dense mounting space, vibrations, dust suspending in the air, etc., the greater fiber core diameter, the more total network reliability From this point of view, silica optical fibers with extremely enlarged great core diameter have some advantages: (a) large core optical fiber provides immunity to bend loss (especially in comparison with standard single-mode optical fibers of ITU-T Rec. G.652) [1,3,6,7,8,9] while (b) fiber optic connections of this type MMFs are less insensitive to vibrations and (c) to contamination of fiber optic connector ferrule end; (d) silica core an silica cladding provide lower loss (more than 1 order) in comparison with polymer or plastic core/cladding optical fibers. We demonstrate some results of tests, performed for manufactured pilot 520 m length of described LOMF 100/125, concerned with its geometry properties as well as key transmission parameters—attenuation and DMD map
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