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.
© 2002 Optical Society of America
Byeong Ha Lee, Joo Beom Eom, Jinchae Kim, Dae Seung Moon, Un-Chul Paek, and Gil-Ho Yang, "Photonic crystal fiber coupler," Opt. Lett. 27, 812-814 (2002)