Abstract

Optimization of the bandwidth of a 2 km 50 μm multimode fiber at 850 nm is investigated theoretically and experimentally by steering a single spot, or two in antiphase spots across the core of the fiber in two dimensions using a ferroelectric liquid-crystal-based spatial light modulator. This method not only allows an optimal offset launch position to be chosen <i>in situ</i> but can also characterize the geometry and position of the core, identify defects, and measure the maximum differential mode delay. Its ability to selectively excite specific mode groups is also of relevance to mode-group division multiplexing.

© 2011 IEEE

Modified twin-spot launching: an improved launching technique for enhancing data rates in multimode fiber

Thomas Joseph and Joseph John
Appl. Opt. 56(4) 838-846 (2017)

Holographic mode-selective launch for bandwidth enhancement in multimode fiber

Angela Amphawan
Opt. Express 19(10) 9056-9065 (2011)

Optically powered radio-over-fiber system based on center- and offset-launching techniques using a conventional multimode fiber

Hayao Kuboki and Motoharu Matsuura
Opt. Lett. 43(5) 1067-1070 (2018)

Variable spatial pattern probe based on offset launch of multimode waveguide for optogenetics

Na Dong, Weifeng Jiang, and Xiaohan Sun
Opt. Express 24(10) 10921-10930 (2016)

Hollow-core conjoined-tube fiber for penalty-free data transmission under offset launch conditions

Xiaocong Wang, Dawei Ge, Wei Ding, Yingying Wang, Shoufei Gao, Xin Zhang, Yizhi Sun, Juhao Li, Zhangyuan Chen, and Pu Wang
Opt. Lett. 44(9) 2145-2148 (2019)