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Lensed photonic crystal fiber obtained by use of an arc discharge.
Kong, Gyeong-Jun,Kim, Jinchae,Choi, Hae-Young,Im, Joo Eun,Park, Byung-Hyuk,Paek, Un-Chul,Lee, Byeong Ha Optical Society of America 2006 Optics letters Vol.31 No.7
<P>A lensed photonic crystal fiber (PCF) is proposed as an effective element for an optical free-space interconnector. By simultaneously forming a beam-expansion region and a focusing lens on a single piece of PCF, effective coupling between PCFs could be achieved. A long working distance of up to 1 mm with wide longitudinal and lateral tolerances was measured. The optical characteristics of the lensed PCFs and the connectors made from them are analyzed experimentally and theoretically.</P>