Taper Fused Fiber Bundle src='/images/tex/32230.gif' alt='1times 4'> Coupler for High Power Splitting

摘要

The first experimental demonstration of a all-fiber power splitter capable of high-power operation is presented. The splitter, prepared by fused taper technique and fusion splicing technique, consists of one input fiber with a core diameter of (NA) and four output fibers with a core diameter of (NA). The device was tested at a laser power up to 166 W and it achieves a low excess loss of 0.56 dB and an excellent uniformity of less than 0.3 dB in port-to-port power splitting ratio. The results of theoretical simulation by the 3-D beam propagation method show that the performance of this splitter could be optimized further through modifying structure parameters.