title: Photonic crystal fiber coupler.
abstract: Fiber couplers made with photonic crystal fibers (PCF) are reported. Two types of PCF were fabricated by means of stacking a group of silica tubes around a silica rod and drawing them. The fiber couplers were made by use of the fused biconical tapered method. With a fiber that had five hexagonally stacked layers of air holes, a 33/67 coupling ratio was obtained, and with a one-layer four-hole fiber, a 48/52 coupling ratio was obtained. The fabrication processes and the characteristics of the PCFs and the PCF couplers are presented.
authors.forename: Byeong Ha
authors.initials: BH
authors.lastname: Lee
authors.forename: Joo Beom
authors.initials: JB
authors.lastname: Eom
authors.forename: Jinchae
authors.initials: J
authors.lastname: Kim
authors.forename: Dae Seung
authors.initials: DS
authors.lastname: Moon
authors.forename: Un-Chul
authors.initials: UC
authors.lastname: Paek
authors.forename: Gil-Ho
authors.initials: GH
authors.lastname: Yang