PMD Compensation/mitigation techniques for high-speed optical transport. - Henning Bülow; Chongjin Xie; Axel Klekamp; Xiang Liu; Bernd Franz (Bell Labs Tech. J., 2009)

Mode Group Division Multiplexing in Graded-Index Multimode Fibers. - Bernd Franz; Henning Bülow (Bell Labs Tech. J., 2013)

High Speed Data Transmission over GI-MMF Using Mode Group Division Multiplexing. - Bernd Franz; Liaquat Ali; Laurent Schmalen; Wilfried Idler (CoRR, 2015)