Author Affiliations
Abstract
Department of Physics, University of Science and Technology of China, Hefei 230026
Multimode dispersion is the main obstacle for high bandwidth in multimode optical fiber (MMF) communication system. Mode selection is an effective method to oppress multimode dispersion. We propose and investigate a kind of polymer optical fiber polished coupler. Beam propagation method (BPM) is employed to calculate the coupling coefficient of transmission modes in MMF coupler, and an output pattern from coupling branch is obtained. Analysis and experiment show that this coupler can select certain modes by changing polished depth, contact area, and intersection angle of two branches, which means that the device can be employed both as a mode selector and a sensor. In addition, simulation shows that five times bandwidth enhancement may be realized by selecting modes with the polymer fiber polished coupler.
多模塑料光纤 耦合器 模式选择 带宽 060.2310 Fiber optics 060.1810 Buffers, couplers, routers,switches, and multiplexers 230.1360 Beam splitters Chinese Optics Letters
2008, 6(1): 16