光学学报, 2005, 25 (6): 743, 网络出版: 2006-05-22
单模与多模光纤耦合器的光束合波
The Combination of Beams between Single-Mode and Multimode Fibers in Fused Coupler
摘要
现有的光纤耦合器在作为分波器使用时具有较低的插入损耗,在作为合波器时插入损耗较大,为实现低损耗合波目的,提出一种由单模与多模光纤共同构成的混合型光纤耦合器。利用耦合波方程理论分析其工作原理,计算机模拟其耦合过程。采用熔锥法制作工艺,完成单模与多模光纤耦合器的制作,实验结果与理论模拟相吻合;该器件单模到多模光纤的耦合效率、多模到多模光纤的耦合效率均在90%以上,实现了两路光束的功率合波。作为低插入损耗合波器件可广泛应用于光通信以及双包层光纤激光器抽运光的注入。
Abstract
As a splitter, the common fiber coupler has a low insert loss, while as a combiner it exhibits high loss. In order to obtain the combining beams with low insert loss, a new configuration coupler is presented, which is consituted with a single-mode fiber and a multimode fiber. The working principle is theoretically analyzed by the coupling wave equation and the coupling procedure is simulated by the computer. The coupler was made with a single-mode fiber and a multimode fiber by fused-taper technology. The result agreed well with the simulating drawing. The combining of two beams is realized. The coupling ratio of each arm is more than 90%. As a combiner, with low insert loss, this component could be used in optical communication and double cladding fiber laser to improve coupling efficiency of pumping light.
柳春郁, 余有龙, 高应俊. 单模与多模光纤耦合器的光束合波[J]. 光学学报, 2005, 25(6): 743. 柳春郁, 余有龙, 高应俊. The Combination of Beams between Single-Mode and Multimode Fibers in Fused Coupler[J]. Acta Optica Sinica, 2005, 25(6): 743.