Mode-field converting fibre fabricated from a side-hole fibre

Mode-field converting fibre fabricated from a side-hole fibre

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A new mode-field converting fibre has been fabricated from a side-hole fibre with a circular core. An elliptical core of the mode-field converting fibre was realised by heating the side-hole fibre from the side to collapse the holes. Transmission loss of the mode-field converting fibre was < 0.1 dB. Coupling efficiency between an LD with an aspect ratio of 3.75 and the mode-field converting fibre was as high as 71.7%.


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