Next-Generation ROADM Employing Bandwidth-Adaptive Silicon-Photonic Filters for Flexible Drop Operation. - Yojiro Mori; Koh Ueda; Keijiro Suzuki; Hiroyuki Matsuura; Ken Tanizawa; Kazuhiro Ikeda; Shu Namiki; Hitoshi Kawashiwa; Ken-ichi Sato (OFC, 2018)