Demonstration of the highly reliable Hikari router network based on a newly developed disjoint path selection scheme. - Satoru Okamoto; Eiji Oki; Katsuhiro Shimano; Akio Sahara; Naoaki Yamanaka (IEEE Commun. Mag., 2002)

Highly-Reliable and Fast M: N End-to-End Restoration Scheme for Photonic IP Networks. - Wataru Imajuku; Yoshiaki Sone; Naohide Nagatsu; Akio Sahara; Yoshihiro Takigawa (IEICE Trans. Commun., 2005)

Proposal of a simple CD roadm with contention-free add/drop function. - Ayako Iwaki; Akio Sahara; Mitsunori Fukutoku (APCC, 2015)

Proposal of a Simple Ultra-Low Contention CD ROADM. - Ayako Iwaki; Akio Sahara; Mitsunori Fukutoku (IEICE Trans. Commun., 2016)